Where do these SMA fault codes come from?

Compiled from publicly available SMA inverter and battery documentation and field references, then rewritten for the trade. Wattbench is independent and not affiliated with SMA.

Which of these can I clear on site?

Some clear on their own once grid or environmental conditions return to normal. Anything involving DC isolation, AC switching, wiring or opening the unit is licensed electrical work. Isolate safely, follow AS/NZS 5033 and AS/NZS 3000 procedure and use appropriate PPE before touching a live system.

The exact code isn't listed. Why not?

Firmware and model variants differ, and manufacturers revise their code tables. We document the most common ones; for a variant that isn't here, check the unit's current manual or the manufacturer's service portal.

How current is this reference?

This reference was last reviewed on 2 August 2026. We revise entries when the underlying manufacturer documentation changes.

Inverter Fault Library

SMA Error Codes

SMA event-code reference with source-linked remedies for Australian Sunny Tripower X models and explicit boundaries around older Sunny Boy and mixed-family records.

Sources listedReviewed August 2026Source: SMA manuals & field referencesOur methodology

Manufacturer: SMA
Codes documented: 36
Source: SMA manuals & field references
Scope: Reference only

To keep this library for use without a signal, save the Inverter recovery pack. Unsaved, the fault finder still identifies these codes offline, but the fixes are only on this page.

36 of 36 codes

About this fault librarySources · scope

A reference compiled by Wattbench from SMA documentation. SMA reports faults as numbered event codes on the inverter display or in Sunny Portal / SMA 360°. Source-linked homeowner and installer remedies are reviewed for the Australian Sunny Tripower X 12/15/20/25 (STP12-50–STP25-50) family. Other grouped Sunny Boy and earlier-family records remain searchable reference and do not inherit Tripower X applicability. Safety: owners should record the event and stop at safely visible conditions. DC/AC switching, wiring, insulation tests, protected parameters and opening equipment are licensed-installer tasks.

Key takeaways

36 SMA fault and alarm codes, documented for the trade.
Compiled from published documentation and field references; Wattbench is independent and not affiliated with SMA.
Codes involving DC/AC isolation, wiring or opening the unit are licensed electrical work. Isolate safely and follow AS/NZS procedure.

Resolution text is manufacturer/service context, not permission for an owner to perform electrical work. Stop at visible observations unless the exact product instructions identify an owner control. Isolation, configuration, testing, opening equipment and wiring are for an appropriately licensed worker and, where required, an SAA-accredited person. Where a card says Product fit is unknown, treat it as brand-level guidance and confirm the exact model, role, regional variant, firmware and current manual before acting.

101 · 102 · 103 · 105
Grid voltage / impedance too high
The grid voltage or grid impedance at the inverter's connection point is too high, so it disconnects.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 101 · 102 · 103 · 105: Grid voltage / impedance too high
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
Usually a network issue rather than a faulty inverter. Confirm the country dataset is correct and the grid voltage is in range; if it's frequently high, contact your installer or network operator. It self-restores when voltage returns to range.
Guided path
Qualified person
Separates a connection-point voltage the network operator owns from an inverter fault SMA Service owns.
Step 1
Establish whether the grid voltage at the inverter's connection point stays inside the permissible range.
Check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 101 · 102 · 103 · 105
Establish whether the grid voltage at the inverter's connection point stays inside the permissible range.
Check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
It goes outside the permissible range because of local grid conditions — Contact the grid operator. The manual puts the next move with them: the operator has to agree either to an adjustment of the voltage at the feed-in point, or to a change of the monitored operating limits.
It stays permanently inside the permissible range and the event is still displayed — Contact SMA Service. The manual documents no further on-site step once the connection-point voltage is confirmed in range.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
202 · 203 · 205
Grid disconnected / voltage too low
The grid has been disconnected, the AC cable is damaged, or the grid voltage is too low.
Show documented next stepHide detail for 202 · 203 · 205: Grid disconnected / voltage too low
Documented next step
Check the AC circuit breaker / main switch is on and the grid is present. If the grid is fine and it persists, have an installer inspect the AC cable and connections.
301
10-minute average voltage out of range
The ten-minute average grid voltage is outside the permissible range.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 301: 10-minute average voltage out of range
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
Monitor the grid voltage during operation. If it's persistently out of range due to local conditions, contact your network operator.
Guided path
Qualified person
The same fork as events 101–105, but measured while the inverter is feeding in, because the trigger is a ten-minute average.
Step 1
Measure during feed-in, not at rest — the event trips on a ten-minute average.
During the feed-in operation, check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 301
Measure during feed-in, not at rest — the event trips on a ten-minute average.
During the feed-in operation, check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
It goes outside the permissible range because of local grid conditions — Contact the grid operator. The manual requires their agreement either to an adjustment of the voltage at the feed-in point, or to a change of the monitored operating limits.
It stays permanently inside the permissible range and the event is still displayed — Contact SMA Service. The manual documents no further on-site step once the connection-point voltage is confirmed in range.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
302
Power reduced: high AC voltage
The inverter has reduced its output because the grid voltage is high (Volt-Watt response, to support grid stability).
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 302: Power reduced: high AC voltage
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
Expected behaviour when grid voltage is high, not a fault. If it happens often it's costing you generation. Your network voltage is high; contact your installer or network operator.
Guided path
Qualified person
Volt-Watt derating: whether it is frequent enough to take to the network operator, and what the manual allows once they answer.
Step 1
Establish how often the grid voltage fluctuates and how often this event appears.
If possible, check the grid voltage and observe how often fluctuations occur.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 302
Establish how often the grid voltage fluctuates and how often this event appears.
If possible, check the grid voltage and observe how often fluctuations occur.
Fluctuations occur frequently and this message is displayed often — Establish whether the network operator will approve a change to the inverter's operating parameters.
Fluctuations are occasional and the message is rare — The manual attaches its next step to frequent fluctuations only and documents none for this case. What the event describes is the inverter reducing its power because grid voltage is too high, to keep the grid stable.
Establish whether the network operator will approve a change to the inverter's operating parameters.
Contact the grid operator and request approval to change the operating parameters of the inverter.
The grid operator gives approval — Discuss any changes to the operating parameters with SMA Service before making them.
The grid operator does not give approval — The manual makes the parameter change conditional on the operator's approval and documents no alternative, so its procedure ends here.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
401 · 404
Islanding / frequency change
A stand-alone (islanded) grid or a very large change in grid frequency was detected.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 401 · 404: Islanding / frequency change
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
Usually a short-term grid event that self-clears. If it recurs, have your installer check the grid connection for frequency fluctuations.
Guided path
Qualified person
The two checks the manual sets after a stand-alone grid or a very large frequency change — the utility grid first, then the connection's short-term frequency.
Step 1
Rule out the utility grid itself before looking at the connection.
Make sure there is no power outage or work being done on the utility grid and contact a grid operator if necessary.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 401 · 404
Rule out the utility grid itself before looking at the connection.
Make sure there is no power outage or work being done on the utility grid and contact a grid operator if necessary.
Look at the grid connection for the condition the event names — a very large change in frequency.
Check the grid connection for significant short-term frequency fluctuations.
The frequency check is done and the event still recurs — This entry's corrective measures end with the frequency check. It documents no next step for what that check finds, and names no service contact here.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
501
Grid frequency out of range
The power frequency is outside the permissible range.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 501: Grid frequency out of range
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
Monitor the frequency. If fluctuations are frequent, common on a backup generator, contact your network operator.
Guided path
Qualified person
Grid frequency out of range: whether it is frequent enough to take to the network operator, and what the manual allows once they answer.
Step 1
Establish how often the grid frequency fluctuates and how often this event appears.
If possible, check the grid frequency and observe how often fluctuations occur.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 501
Establish how often the grid frequency fluctuates and how often this event appears.
If possible, check the grid frequency and observe how often fluctuations occur.
Fluctuations occur frequently and this message is displayed often — Establish whether the network operator will approve a change to the inverter's operating parameters.
Fluctuations are occasional and the message is rare — The manual attaches its next step to frequent fluctuations only and documents none for this case. What the event describes is the grid frequency falling outside the permissible range and the inverter disconnecting from the utility grid.
Establish whether the network operator will approve a change to the inverter's operating parameters.
Contact the grid operator and request approval to change the operating parameters of the inverter.
The grid operator gives approval — Discuss any changes to the operating parameters with SMA Service before making them.
The grid operator does not give approval — The manual makes the parameter change conditional on the operator's approval and documents no alternative, so its procedure ends here.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
507
Power reduced: high AC frequency
The inverter has reduced its output because the grid frequency is too high, to support grid stability.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 507: Power reduced: high AC frequency
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
A grid-side condition, not an inverter fault. If possible, check the grid frequency and observe how often fluctuations occur. If they are frequent and this message is displayed often, contact the grid operator and request approval to change the inverter's operating parameters; if they approve, discuss any change with SMA Service first.
Guided path
Qualified person
Frequency derating: whether it is frequent enough to take to the network operator, and what the manual allows once they answer.
Step 1
Establish how often the grid frequency fluctuates and how often this event appears.
If possible, check the grid frequency and observe how often fluctuations occur.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 507
Establish how often the grid frequency fluctuates and how often this event appears.
If possible, check the grid frequency and observe how often fluctuations occur.
Fluctuations occur frequently and this message is displayed often — Establish whether the network operator will approve a change to the inverter's operating parameters.
Fluctuations are occasional and the message is rare — The manual attaches its next step to frequent fluctuations only and documents none for this case. What the event describes is the inverter reducing its power because grid frequency is too high, to keep the grid stable.
Establish whether the network operator will approve a change to the inverter's operating parameters.
Contact the grid operator and request approval to change the operating parameters of the inverter.
The grid operator gives approval — Discuss any changes to the operating parameters with SMA Service before making them.
The grid operator does not give approval — The manual makes the parameter change conditional on the operator's approval and documents no alternative, so its procedure ends here.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
601
Excess DC in grid current
The inverter detected an excessively high proportion of direct current in the grid current.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 601: Excess DC in grid current
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
A licensed installer should verify the event, grid-current condition and current country dataset against the STPxx-50 event manual. Do not raise a monitoring threshold without the required network approval; escalate a recurring event to SMA service.
Guided path
Qualified person
Separates a one-off DC-in-grid-current trip from a recurring one, which is the only case this entry escalates.
Step 1
Check the connection for direct current, then settle whether this is a one-off or a pattern — the entry only escalates the pattern.
Check the grid connection for direct current.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 601
Check the connection for direct current, then settle whether this is a one-off or a pattern — the entry only escalates the pattern.
Check the grid connection for direct current.
The message is displayed frequently — Contact the grid operator and check whether the monitoring threshold on the inverter can be raised.
It has appeared once, or only occasionally — This entry's corrective measures are the direct-current check above and, for a message displayed frequently, the grid operator. It documents no further step for an isolated occurrence.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
701
Frequency not permitted
The grid frequency is not within the permissible range. The inverter has disconnected from the utility grid.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 701: Frequency not permitted
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
A licensed installer should check the AC wiring from the inverter to the feed-in meter and, if possible, check the grid frequency and observe how often fluctuations occur. If they occur frequently and this message is displayed often, request the grid operator's approval to change the inverter's operating parameters; if they approve, discuss any change with SMA Service first, as the STPxx-50 event entry sets out.
Guided path
Qualified person
Checks the AC wiring to the feed-in meter first, then the same frequency-fluctuation and operator-approval sequence as event 501.
Step 1
Start with the wiring, which is this entry's first corrective measure.
Check the AC wiring from the inverter to the feed-in meter.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 701
Start with the wiring, which is this entry's first corrective measure.
Check the AC wiring from the inverter to the feed-in meter.
Establish how often the grid frequency fluctuates and how often this event appears.
If possible, check the grid frequency and observe how often fluctuations occur.
Fluctuations occur frequently and this message is displayed often — Establish whether the network operator will approve a change to the inverter's operating parameters.
Fluctuations are occasional and the message is rare — The manual attaches its next step to frequent fluctuations only and documents none for this case. What the event describes is the grid frequency falling outside the permissible range and the inverter disconnecting from the utility grid.
Establish whether the network operator will approve a change to the inverter's operating parameters.
Contact the grid operator and request approval to change the operating parameters of the inverter.
The grid operator gives approval — Discuss any changes to the operating parameters with SMA Service before making them.
The grid operator does not give approval — The manual makes the parameter change conditional on the operator's approval and documents no alternative, so its procedure ends here.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
901
Grounding (PE) connection missing
The protective-earth (grounding) conductor is not correctly connected.
Show documented next stepHide detail for 901: Grounding (PE) connection missing
Documented next step
An electrical-safety fault. Have a licensed electrician or installer check the earth connection against the installation manual. Don't keep resetting it.
1001
Line and neutral swapped
The L (active) and N (neutral) connections are swapped.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 1001: Line and neutral swapped
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave AC, PV and earthing wiring and isolators untouched, and contact the installer. Wiring and insulation checks require a licensed worker.
Installer remedy
A wiring fault. Have your installer correct the L and N connections per the installation manual.
Guided path
Qualified person
The two AC-connection checks the manual sets before a transposed active/neutral becomes an SMA Service call.
Step 1
Work the AC connection from the inverter outwards, then re-read the event.
Check the AC wiring from the inverter to the feed-in meter.
Check the AC voltages on the inverter connection.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 1001
Work the AC connection from the inverter outwards, then re-read the event.
Check the AC wiring from the inverter to the feed-in meter.
Check the AC voltages on the inverter connection.
The message is still displayed after both checks — Contact SMA Service. The manual gives no third on-site check for this event.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
1101
Installation error
A second line conductor is connected to N.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 1101: Installation error
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave AC, PV and earthing wiring and isolators untouched, and contact the installer. Wiring and insulation checks require a licensed worker.
Installer remedy
A licensed installer should connect the neutral conductor to N. The STPxx-50 event entry records that a second line conductor is connected to N.
Guided path
Qualified person
The single corrective measure the manual gives when a second line conductor is on N — no fork, because the entry has none.
Step 1
A second line conductor is connected to N.
Connect the neutral conductor to N.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 1101
A second line conductor is connected to N.
Connect the neutral conductor to N.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
1302
Waiting for grid voltage
L or N is not connected (or an AC conductor is damaged), often simply a mains outage.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 1302: Waiting for grid voltage
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
If there's a power cut, it clears when supply returns. Otherwise check the AC main switch is on and the breaker hasn't tripped; if it persists, have an installer check the AC conductors.
Guided path
Qualified person
The manual's full connection sequence, including its fork on the earthing system — a different neutral-to-earth limit for TN-C and for TT.
Step 1
Confirm supply actually reaches the inverter and that it is configured for this grid.
Ensure that the miniature circuit breaker is switched on.
Ensure that the correct country data set has been configured in the inverter.
Ensure that the AC connection at the inverter and at the point of interconnection is correctly executed. Repair or replace defective terminal points and fuses.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 1302
Confirm supply actually reaches the inverter and that it is configured for this grid.
Ensure that the miniature circuit breaker is switched on.
Ensure that the correct country data set has been configured in the inverter.
Ensure that the AC connection at the inverter and at the point of interconnection is correctly executed. Repair or replace defective terminal points and fuses.
Compare what the inverter sees with what the sub-distribution sees.
Ensure that the AC voltage at the AC connection of the inverter and in the sub-distribution is in the permissible range. There should only be a few volts of difference between the values.
For three-phase inverters, perform the measurements for all connection line conductors.
Identify the earthing arrangement — the manual sets a different neutral-to-earth limit for each one it covers.
Establish which earthing system the inverter is connected to.
Permitted grid configurations: the inverter is approved for operation in TN-C, TN-S, TN-C-S and TT grids. Operation in IT or Delta IT grids is not permitted.
TN-C system — Measure neutral against protective earth on a TN-C system.
TT system — Measure neutral against protective earth on a TT system.
TN-S or TN-C-S system — The manual approves this earthing system, but its neutral-to-earth limits do not reach it.
IT or Delta IT system — The manual does not permit operation of this inverter in IT or Delta IT grids, and this entry's corrective measures give no step for one.
Measure neutral against protective earth on a TN-C system.
If the inverter is connected to a TN-C system, ensure that the voltage between N and PE is less than 0.3 V.
Measure neutral against protective earth on a TT system.
If the inverter is connected to a TT system, ensure that the voltage between N and PE is less than 10 V.
The manual approves this earthing system, but its neutral-to-earth limits do not reach it.
This entry states a neutral-to-earth limit for a TN-C system and for a TT system, and gives no figure for a TN-S or TN-C-S system — nor does any other page of the manual.
The measurements that follow are stated without reference to the earthing system, so continue with them.
Check each line conductor against protective earth, then against neutral.
Ensure that the voltage between the line conductor and protective conductor is the same as the mains voltage and in the permissible range. For three-phase inverters, perform the measurements for all connection line conductors.
Ensure that the voltage between the line conductor and neutral conductor is the same as the mains voltage and in the permissible range. For three-phase inverters, perform the measurements for all connection line conductors.
Close out on the installation's earthing.
Ensure that all grounding measures are correctly executed.
If necessary, check that the neutral point grounding of the system transformer is correct.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
1501
Reconnection fault (country dataset)
A changed country dataset or parameter value doesn't match local requirements.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 1501: Reconnection fault (country dataset)
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and leave protected settings and self-test controls to the responsible installer. Contact the installer if the event blocks operation or repeats.
Installer remedy
The responsible installer should verify the Australian country dataset and protected parameter state against the STPxx-50 manual. Use authorised credentials only for an approved change; do not alter grid settings merely to clear the event.
Guided path
Qualified person
The single configuration check the manual documents for a reconnection fault — no fork, because the entry has none.
Step 1
Check the configured country data set against what this connection requires.
Ensure that the country data set has been configured correctly.
To do this, select the parameter Set country standard and check the value.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 1501
Check the configured country data set against what this connection requires.
Ensure that the country data set has been configured correctly.
To do this, select the parameter Set country standard and check the value.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
3301 · 3302 · 3303
Unstable operation (low DC)
There isn't enough power at the DC input for stable operation.
Show documented next stepHide detail for 3301 · 3302 · 3303: Unstable operation (low DC)
Documented next step
Often just low light, shading, or snow on the array. Check the panels are clear and the array is error-free; if it persists in good sun, contact your installer.
3401 · 3402 · 3407
DC over-voltage
Over-voltage at the DC input. This can destroy the inverter.
Show documented next stepHide detail for 3401 · 3402 · 3407: DC over-voltage
Documented next step
Switch off the DC isolator and contact your installer immediately. The DC input voltage is above the inverter's maximum. The string is likely sized too long and must be corrected by a professional before reconnection.
3501
Insulation failure (ground fault)
A ground fault / low insulation resistance detected on the DC (PV) side, safety-critical, and common in wet weather.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 3501: Insulation failure (ground fault)
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave AC, PV and earthing wiring and isolators untouched, and contact the installer. Wiring and insulation checks require a licensed worker.
Installer remedy
A licensed installer should follow the STPxx-50 event procedure to locate and rectify the PV insulation or residual-current cause under safe isolation. Clear the event only after the fault is corrected; do not transfer a Sunny Boy reset instruction to this Tripower X record.
Guided path
Qualified person
The manual's insulation-failure sequence, with its two ground-fault tests — string-to-earth voltage, then insulation resistance — each of which stops the walk when it finds one, ending with SMA Service if the error persists.
Step 1
Establish how often the event occurs and when, because that sets the conditions every measurement below has to be taken under.
Check the frequency and duration of the event message in the inverter's user interface or in the Sunny Portal.
The measurements listed below should be performed under the same ambient conditions and at the same time of day as when the error occurred — ideally while an event message is active.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 3501
Establish how often the event occurs and when, because that sets the conditions every measurement below has to be taken under.
Check the frequency and duration of the event message in the inverter's user interface or in the Sunny Portal.
The measurements listed below should be performed under the same ambient conditions and at the same time of day as when the error occurred — ideally while an event message is active.
Establish whether module electronics sit between the array and the measurements.
Establish whether module electronic components, such as SunSpec-compatible module disconnectors, are present.
Module electronic components are present — Keep the module electronics' signal up while you measure.
There are no module electronic components — Confirm the strings are reading the way the design says they should before drawing anything from a fault measurement.
Keep the module electronics' signal up while you measure.
If module electronic components, such as SunSpec-compatible module disconnectors, are present, an additional device is required to maintain the SunSpec PLC signal.
Confirm the strings are reading the way the design says they should before drawing anything from a fault measurement.
Verify through measurement of the open-circuit voltage of the PV strings that the measured values correspond to the system design and prevailing irradiation conditions.
Measure each string against protective earth — the first of the entry's two ground-fault tests.
Measure the voltage of each PV string between DC+ and PE, and between DC− and PE, using a suitable measuring device.
A stable voltage is measured that approximately equals the string voltage — This indicates a ground fault. Correct the ground fault on the relevant PV string and only then reconnect.
No stable voltage approximating the string voltage is measured — Measure insulation resistance — the entry's second ground-fault test.
Measure insulation resistance — the entry's second ground-fault test.
Checking the PV System for Ground Faults: the insulation resistance can only be measured with a suitable device for safe disconnection and short-circuiting of the PV modules. If no suitable device is available, the insulation measurement must not be carried out. Only use measuring devices with a DC input voltage range of 1000 V or higher.
Measure the insulation resistance of each PV string using an insulation resistance meter.
Ensure that the PV string is short-circuited during these measurements and that the maximum permissible system voltage of the PV modules is not exceeded.
The insulation resistance is too low — This indicates a ground fault. Correct the ground fault on the relevant PV string and only then reconnect.
The insulation resistance is not too low — Inspect the DC installation itself, which is where the entry's procedure ends.
Inspect the DC installation itself, which is where the entry's procedure ends.
Visually inspect the entire DC installation (PV modules, cables, plug connections, and any existing components such as module optimizers or disconnectors) to ensure there are no signs of damage, such as porosity, cracks, crushing, deformation, or discoloration.
Tip: Use an IR camera for support.
A component shows signs of damage — Replace or repair any defective components.
The whole DC installation inspects clean and the inverter still displays an insulation error — Checking the PV System for Ground Faults: if the inverter still displays an insulation error, contact SMA Service. The manual notes the PV modules might not be suitable for the inverter in the present quantity.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
3601
High leakage current
The leakage current of the inverter and the PV module is too high: there is a ground fault, a residual current or a malfunction. The inverter interrupts feed-in immediately after exceeding a threshold and reconnects automatically once the fault is eliminated.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 3601: High leakage current
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave AC, PV and earthing wiring and isolators untouched, and contact the installer. Wiring and insulation checks require a licensed worker.
Installer remedy
A licensed installer should check the PV system for ground faults, as the STPxx-50 event entry sets out. The inverter interrupts feed-in once the leakage current exceeds its threshold and reconnects automatically when the fault is eliminated.
Guided path
Qualified person
The manual's ground-fault procedure, which this entry points to: the equipment it requires, the string-by-string insulation measurement, and SMA Service if the insulation error persists.
Step 1
This entry's one corrective measure is the manual's ground-fault procedure, which names event 3601 among the events it serves.
Check the PV system for ground faults.
Checking the PV System for Ground Faults: if a ground fault occurs, parts of the system may still be live. Disconnect the product from voltage sources and ensure it cannot be reconnected before working on the device. Only touch the cables of the PV modules on their insulation, and do not touch any parts of the substructure or frame of the PV array.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 3601
This entry's one corrective measure is the manual's ground-fault procedure, which names event 3601 among the events it serves.
Check the PV system for ground faults.
Checking the PV System for Ground Faults: if a ground fault occurs, parts of the system may still be live. Disconnect the product from voltage sources and ensure it cannot be reconnected before working on the device. Only touch the cables of the PV modules on their insulation, and do not touch any parts of the substructure or frame of the PV array.
Confirm you have the equipment the procedure requires before measuring anything.
Checking the PV System for Ground Faults: the required equipment is a suitable device for safe disconnection and short-circuiting, and a measuring device for insulation resistance.
Only use measuring devices with a DC input voltage range of 1000 V or higher.
A suitable device for safe disconnection and short-circuiting of the PV modules is available — Set up for the measurement, in the procedure's order.
No suitable device for safe disconnection and short-circuiting is available — Checking the PV System for Ground Faults: if no suitable device is available, the insulation measurement must not be carried out. The procedure documents no other way to check this event.
Set up for the measurement, in the procedure's order.
Calculate the expected insulation resistance per string.
Disconnect the inverter from all voltage sources.
Install the short circuit device.
Connect the measuring device for insulation resistance.
Measure each string in turn and compare it with the value you calculated.
Short-circuit the first string.
Set the test voltage. The test voltage should be as close as possible to the maximum system voltage of the PV modules but must not exceed it (see datasheet of the PV modules).
Measure the insulation resistance.
Eliminate the short circuit.
Measure the remaining strings in the same manner.
A string's insulation resistance deviates considerably from the theoretically calculated value — There is a ground fault present in that string.
No string deviates considerably from its calculated value — Bring the inverter back and see whether the error stays.
There is a ground fault present in that string.
Do not connect PV strings with ground faults to the inverter.
Reconnect to the inverter only those strings from which the ground fault has been eliminated.
Bring the inverter back and see whether the error stays.
Reconnect all other strings to the inverter.
Recommission the inverter.
The inverter still displays an insulation error — Checking the PV System for Ground Faults: if the inverter still displays an insulation error, contact SMA Service. The manual notes the PV modules might not be suitable for the inverter in the present quantity.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
3701
Residual current too high
The inverter detected an excessive residual (earth-leakage) current, an electric-shock hazard.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 3701: Residual current too high
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave AC, PV and earthing wiring and isolators untouched, and contact the installer. Wiring and insulation checks require a licensed worker.
Installer remedy
A licensed installer should follow the STPxx-50 event procedure to locate and rectify the PV insulation or residual-current cause under safe isolation. Clear the event only after the fault is corrected; do not transfer a Sunny Boy reset instruction to this Tripower X record.
Guided path
Qualified person
Works the AC side first — supply voltages, neutral-to-earth, module frame earthing — before joining the same DC measurement sequence event 3501 uses.
Step 1
Start on the AC side: this entry's first checks are at the inverter's AC connection and at the sub-distribution.
Ensure that the AC voltage between L and N, L and PE, and N and PE at the AC connection of the inverter and in the sub-distribution is in the permissible range.
For three-phase inverters, perform the measurements for all connection line conductors.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 3701
Start on the AC side: this entry's first checks are at the inverter's AC connection and at the sub-distribution.
Ensure that the AC voltage between L and N, L and PE, and N and PE at the AC connection of the inverter and in the sub-distribution is in the permissible range.
For three-phase inverters, perform the measurements for all connection line conductors.
Measure neutral against protective earth.
Using a suitable measuring device, ensure that the voltage between N and PE is less than 10 V.
Close out the AC-side earthing before moving to the array.
Ensure that the module frame is correctly grounded.
Move to the DC side. From here the entry runs the same measurement sequence as event 3501.
Check the PV system for ground faults.
Establish how often the event occurs and when, because that sets the conditions every measurement below has to be taken under.
Check the frequency and duration of the event message in the inverter's user interface or in the Sunny Portal.
The measurements listed below should be performed under the same ambient conditions and at the same time of day as when the error occurred — ideally while an event message is active.
Establish whether module electronics sit between the array and the measurements.
Establish whether module electronic components, such as SunSpec-compatible module disconnectors, are present.
Module electronic components are present — Keep the module electronics' signal up while you measure.
There are no module electronic components — Confirm the strings are reading the way the design says they should before drawing anything from a fault measurement.
Keep the module electronics' signal up while you measure.
If module electronic components, such as SunSpec-compatible module disconnectors, are present, an additional device is required to maintain the SunSpec PLC signal.
Confirm the strings are reading the way the design says they should before drawing anything from a fault measurement.
Verify through measurement of the open-circuit voltage of the PV strings that the measured values correspond to the system design and prevailing irradiation conditions.
Measure each string against protective earth — the first of the entry's two ground-fault tests.
Measure the voltage of each PV string between DC+ and PE, and between DC− and PE, using a suitable measuring device.
A stable voltage is measured that approximately equals the string voltage — This indicates a ground fault. Correct the ground fault on the relevant PV string and only then reconnect.
No stable voltage approximating the string voltage is measured — Measure insulation resistance — the entry's second ground-fault test.
Measure insulation resistance — the entry's second ground-fault test.
Checking the PV System for Ground Faults: the insulation resistance can only be measured with a suitable device for safe disconnection and short-circuiting of the PV modules. If no suitable device is available, the insulation measurement must not be carried out. Only use measuring devices with a DC input voltage range of 1000 V or higher.
Measure the insulation resistance of each PV string using an insulation resistance meter.
Ensure that the PV string is short-circuited during these measurements and that the maximum permissible system voltage of the PV modules is not exceeded.
The insulation resistance is too low — This indicates a ground fault. Correct the ground fault on the relevant PV string and only then reconnect.
The insulation resistance is not too low — Inspect the DC installation itself, which is where the entry's procedure ends.
Inspect the DC installation itself, which is where the entry's procedure ends.
Visually inspect the entire DC installation (PV modules, cables, plug connections, and any existing components such as module optimizers or disconnectors) to ensure there are no signs of damage, such as porosity, cracks, crushing, deformation, or discoloration.
Tip: Use an IR camera for support.
A component shows signs of damage — Replace or repair any defective components.
The whole DC installation inspects clean and the inverter still displays an insulation error — Checking the PV System for Ground Faults: if the inverter still displays an insulation error, contact SMA Service. The manual notes the PV modules might not be suitable for the inverter in the present quantity.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
3801 · 3802 · 3805
DC over-current
Over-current at the DC input; the inverter briefly interrupts feed-in.
Show documented next stepHide detail for 3801 · 3802 · 3805: DC over-current
Documented next step
If it's frequent, have your installer verify the PV array is correctly rated and wired (and check for a short circuit).
3901 · 3902
Waiting for DC start conditions
The conditions for feeding into the grid aren't yet met, typically insufficient irradiation.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 3901 · 3902: Waiting for DC start conditions
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Note the time and check only for safely visible shading or low light. If the event remains in good daylight, contact the installer; do not operate isolators.
Installer remedy
Normal early/late in the day. Make sure the array isn't covered or shaded; if it persists in good sun, contact your installer.
Guided path
Qualified person
Separates a start-up message higher irradiation clears from one that keeps recurring, which the manual answers differently in the morning and at medium irradiation.
Step 1
The feed-in conditions are not yet met. Rule out a covered array, then give it light.
Ensure that the PV module is not covered by snow or otherwise shaded.
Wait for higher irradiation.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 3901 · 3902
The feed-in conditions are not yet met. Rule out a covered array, then give it light.
Ensure that the PV module is not covered by snow or otherwise shaded.
Wait for higher irradiation.
If the message keeps coming back, when it appears decides which of the entry's two remedies applies.
Establish whether the message is displayed frequently in the morning, frequently with medium irradiation, or neither.
It is displayed frequently in the morning — Increase the voltage limit for starting grid feed-in: change the parameter Critical voltage to start feed-in. The manual gives no value for it.
It is displayed frequently with medium irradiation — Ensure that the PV module is correctly rated. Event 3901's entry adds "and wired"; event 3902's says correctly rated only.
It is not displayed frequently — For this case the entry's corrective measures are the cover and shading check and waiting for higher irradiation. It documents no further step and names no service contact.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
4301
Serial el.arc in String detected by AFCI mod.
The inverter's arc-fault circuit interrupter (AFCI) has detected a serial electric arc in the indicated string ("String N/A" if it could not be assigned) and interrupts feed-in. This is often caused by a defect in the series connection of the PV modules, especially at the PV connectors.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 4301: Serial el.arc in String detected by AFCI mod.
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave AC, PV and earthing wiring and isolators untouched, and contact the installer. Wiring and insulation checks require a licensed worker.
Installer remedy
A licensed installer should inspect the indicated PV string, or every string if none was identified: ensure no optimisers are installed at the PV modules (the arc-fault circuit interrupter is not designed for them), ensure any additional DC components are compatible and that only PV connectors of the same type and manufacturer are mated, and visually inspect the entire DC installation, replacing or repairing defective components. If the cause cannot be identified, SMA says to take the inverter out of operation until the investigation and corrective action are complete. If the AFCI with manual restart is activated, start the manual restart.
Guided path
Qualified person
The arc-fault entry's checks for the indicated string — optimizers, component compatibility, connector matching, then a visual inspection — and what the manual says when no cause is found.
Step 1
Settle which strings to work on. The manual says the PV system should immediately be inspected by qualified persons: recurring errors may damage neighbouring conductors and system components, and could even lead to uncontrolled electric arcs and fires.
Perform the following measures either for the indicated PV string or, if no string has been identified ("String N/A"), for all PV strings.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 4301
Settle which strings to work on. The manual says the PV system should immediately be inspected by qualified persons: recurring errors may damage neighbouring conductors and system components, and could even lead to uncontrolled electric arcs and fires.
Perform the following measures either for the indicated PV string or, if no string has been identified ("String N/A"), for all PV strings.
Rule out the installation conditions the entry names before inspecting for damage.
Ensure that there are no optimizers installed at the PV modules. The arc-fault circuit interrupter is not designed for operation with optimizers.
When using additional components in the DC installation, for example module switches, ensure compatibility.
Ensure that only PV connectors of the same type and from the same manufacturer are connected to each other.
Inspect the DC installation. The manual says the cause is often a defect in the series connection of the PV modules, especially at the PV connectors.
Visually inspect the entire DC installation (PV modules, cables, plug connections, and any existing components such as module disconnectors) to ensure there are no signs of damage, such as porosity, cracks, crushing, deformation, or discoloration.
Tip: Use an IR camera for support.
A component shows signs of damage or is defective — Correct the fault, then restart, which is the entry's last corrective measure.
The cause of the error cannot be identified — The entry's corrective measures give no further check. Its explanation says that if it is not possible to identify the cause, the inverter should be taken out of operation until the investigation and corrective action can be completed. It names no service contact.
Correct the fault, then restart, which is the entry's last corrective measure.
Replace or repair any defective components.
If the arc-fault circuit interrupter (AFCI) with manual restart is activated, start the manual restart.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
6501 · 6502 · 6509
Over-temperature
The inverter has switched off (or derated) due to excessive temperature.
Show documented next stepHide detail for 6501 · 6502 · 6509: Over-temperature
Documented next step
Clear dust from the cooling fins and air ducts, ensure good ventilation, and keep the ambient temperature within limits (and the unit out of direct sun). If it persists, contact your installer.
6511
Self-diagnosis / Overtemperature
An overtemperature has been detected in the choke area.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 6511: Self-diagnosis / Overtemperature
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and check only for safely visible conditions, such as direct sun on the inverter or something obstructing its ventilation. Leave cleaning the cooling fins and air ducts to the installer, do not open the inverter, and contact the installer.
Installer remedy
A licensed installer should clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush, ensure the inverter has sufficient ventilation, and ensure it is not exposed to direct solar irradiation, as the STPxx-50 event entry sets out. The entry records an overtemperature in the choke area.
Guided path
Qualified person
The three cooling measures the manual gives for an overtemperature in the choke area — no fork, because the entry has none.
Step 1
An overtemperature has been detected in the choke area. Work through the entry's three measures.
Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush.
Ensure that the inverter has sufficient ventilation.
Ensure that the inverter is not exposed to direct solar irradiation.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 6511
An overtemperature has been detected in the choke area. Work through the entry's three measures.
Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush.
Ensure that the inverter has sufficient ventilation.
Ensure that the inverter is not exposed to direct solar irradiation.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
6512
Minimum operating temperature not reached
It's too cold. The inverter only resumes feed-in once the temperature reaches at least −25 °C.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 6512: Minimum operating temperature not reached
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
No action is normally required. Record the event and allow the inverter to resume when its operating temperature is reached.
Installer remedy
No action needed; it resumes automatically as the temperature rises.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
6602
Overvoltage grid (SW)
The effective value of the grid voltage is above the permitted voltage threshold values for a specified period of time (AF limit).
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 6602: Overvoltage grid (SW)
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and time, check only whether the property has grid supply, and allow the inverter to recover. If it repeats, contact the installer; do not change the country dataset or protected grid parameters.
Installer remedy
A licensed installer should check the grid voltage and the connection on the inverter. If the grid voltage is outside the permissible range because of local grid conditions, ask the grid operator whether the voltage can be adjusted at the feed-in point or whether changing the monitored operating limits would be acceptable, as the STPxx-50 event entry sets out.
Guided path
Qualified person
Checks the grid voltage and connection, then takes local grid conditions to the network operator with the two questions the manual sets.
Step 1
The grid voltage's effective value has stayed above the permitted threshold for a specified period (AF limit). Check it at the inverter.
Check the grid voltage and connection on the inverter.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 6602
The grid voltage's effective value has stayed above the permitted threshold for a specified period (AF limit). Check it at the inverter.
Check the grid voltage and connection on the inverter.
The grid voltage lies outside the permissible range due to local grid conditions — Ask the grid operator if the voltage can be adjusted at the feed-in point, or if it would be acceptable to change the monitored operating limits.
The grid voltage is not outside the permissible range due to local grid conditions — This entry's corrective measures are the voltage and connection check and, for local grid conditions, the grid operator. It documents no further step for this case and names no service contact.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
7001
Fault sensor interior temperature
A temperature sensor in the inverter is defective and the inverter interrupts the feed-in operation. The red LED on the inverter lights up.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 7001: Fault sensor interior temperature
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave the inverter, its isolators, wiring and settings untouched, and contact the installer.
Installer remedy
The STPxx-50 event entry states that the assembly or inverter needs to be replaced: a temperature sensor in the inverter is defective and the inverter interrupts feed-in.
Guided path
Qualified person
The one corrective measure the manual gives for this defective temperature sensor — no fork, because the entry has none.
Step 1
A temperature sensor in the inverter is defective and the inverter interrupts feed-in. The red LED on the inverter lights up.
The assembly or inverter needs to be replaced.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 7001
A temperature sensor in the inverter is defective and the inverter interrupts feed-in. The red LED on the inverter lights up.
The assembly or inverter needs to be replaced.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
7014
Fault boost converter temperature sensor
The event message names a fault in the boost converter temperature sensor. The entry's explanation states only that the fan is always on.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 7014: Fault boost converter temperature sensor
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave the inverter, its isolators, wiring and settings untouched, and contact the installer.
Installer remedy
Contact SMA Service, as the STPxx-50 event entry sets out. Its explanation records only that the fan is always on.
Guided path
Qualified person
The manual's one corrective measure for a boost converter temperature sensor fault is SMA Service — no fork, because the entry has none.
Step 1
The entry's explanation states only that the fan is always on.
Contact SMA Service.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 7014
The entry's explanation states only that the fan is always on.
Contact SMA Service.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
7015
Fault sensor interior temperature
A temperature sensor in the inverter is defective and the inverter interrupts the feed-in operation. The cause must be determined by SMA Service.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 7015: Fault sensor interior temperature
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave the inverter, its isolators, wiring and settings untouched, and contact the installer.
Installer remedy
Contact SMA Service, as the STPxx-50 event entry sets out: a temperature sensor in the inverter is defective, the inverter interrupts feed-in, and the cause must be determined by the Service.
Guided path
Qualified person
The manual's one corrective measure for this defective temperature sensor is SMA Service, which must determine the cause — no fork, because the entry has none.
Step 1
A temperature sensor in the inverter is defective and the inverter interrupts feed-in. The cause must be determined by the Service.
Contact SMA Service.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 7015
A temperature sensor in the inverter is defective and the inverter interrupts feed-in. The cause must be determined by the Service.
Contact SMA Service.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
7500 · 7501
Fan fault
A cooling fan is not functioning properly.
Show documented next stepHide detail for 7500 · 7501: Fan fault
Documented next step
Check the fan area for blockage. If the fan is faulty it needs service. Contact your installer or SMA Service.
7701 · 7702 · 7703
Grid relay defect
The grid disconnection relay is defective or failed its test.
Show documented next stepHide detail for 7701 · 7702 · 7703: Grid relay defect
Documented next step
A hardware fault. Contact SMA Service or your installer. If shown only occasionally, note whether it recurs.
7801
Fault overvoltage protector
One or more surge arresters have tripped, or one or more surge arresters or the telecommunication cable are not inserted correctly.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 7801: Fault overvoltage protector
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event, leave the inverter, its isolators, wiring and settings untouched, and contact the installer.
Installer remedy
A licensed installer should ensure the surge arrester and the telecommunication cable are inserted correctly and, if surge arresters have tripped, replace the tripped surge arresters with new surge arresters, as the STPxx-50 event entry sets out.
Guided path
Qualified person
Checks the surge arrester and telecommunication cable are seated, then replaces any surge arrester that has tripped.
Step 1
One or more surge arresters have tripped, or one or more surge arresters or the telecommunication cable are not inserted correctly. Check the seating first.
Ensure that the surge arrester and the telecommunication cable are inserted correctly.
What did you find?
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 7801
One or more surge arresters have tripped, or one or more surge arresters or the telecommunication cable are not inserted correctly. Check the seating first.
Ensure that the surge arrester and the telecommunication cable are inserted correctly.
Surge arresters have tripped — Replace the tripped surge arresters with new surge arresters.
No surge arrester has tripped — This entry's corrective measures are the seating check above and, for tripped surge arresters, their replacement. It documents no further step for this case and names no service contact.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
8003
Power reduced: temperature
The inverter has reduced output for more than ten minutes because of excessive temperature.
Show documented next stepHide detail for 8003: Power reduced: temperature
Documented next step
Clean the cooling fins and air ducts, ensure adequate ventilation, and keep the ambient temperature within the rated limit. If it recurs, contact your installer.
9002
Installer code invalid
The SMA Grid Guard code entered is incorrect, so the protected operating parameters stay locked.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 9002: Installer code invalid
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and leave protected settings and self-test controls to the responsible installer. Contact the installer if the event blocks operation or repeats.
Installer remedy
The responsible installer should verify the Australian country dataset and protected parameter state against the STPxx-50 manual. Use authorised credentials only for an approved change; do not alter grid settings merely to clear the event.
Guided path
Qualified person
The single corrective measure the manual gives for a rejected Grid Guard code — no fork, because the entry has none.
Step 1
The code entered was incorrect, so the operating parameters are still protected and cannot be changed.
Enter the correct SMA Grid Guard code.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 9002
The code entered was incorrect, so the operating parameters are still protected and cannot be changed.
Enter the correct SMA Grid Guard code.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
9003
Grid parameters locked
Changes to the grid parameters are now blocked (they require the Grid Guard code).
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 9003: Grid parameters locked
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and leave protected settings and self-test controls to the responsible installer. Contact the installer if the event blocks operation or repeats.
Installer remedy
The responsible installer should verify the Australian country dataset and protected parameter state against the STPxx-50 manual. Use authorised credentials only for an approved change; do not alter grid settings merely to clear the event.
Guided path
Qualified person
Who the manual allows to change locked grid parameters, and who it says to coordinate the change with — no fork, because the entry has none.
Step 1
Changes to the grid parameters are now blocked.
In order to be able to make changes to the grid parameters, you must be logged in as Administrator or Installer on the user interface.
All changes to grid-relevant parameters should be coordinated with the grid operator.
This is the end of the documented procedure for this code.
On this device only. Signed in? Account Jobs still work.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 9003
Changes to the grid parameters are now blocked.
In order to be able to make changes to the grid parameters, you must be logged in as Administrator or Installer on the user interface.
All changes to grid-relevant parameters should be coordinated with the grid operator.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff
9007
Self-test aborted
The inverter's self-test was terminated.
Product fit · Confirmed · Sunny Tripower X 12/15/20/25
Show field stepsHide field steps for 9007: Self-test aborted
Product fit
- Sunny Tripower X 12/15/20/25 · Three-phase string inverter
  Confirmed · STP12-50–STP25-50 · Firmware 2.06.04.R or later
Safe checks now
Record the event and leave protected settings and self-test controls to the responsible installer. Contact the installer if the event blocks operation or repeats.
Installer remedy
A licensed installer should ensure the AC connection is correct and the country dataset has been entered correctly, then restart the self-test, as the STPxx-50 event entry sets out.
Guided path
Qualified person
The two checks the manual sets before restarting an aborted self-test, and where its procedure ends if the self-test aborts again.
Step 1
Before restarting the self-test, check the two things the entry names.
Ensure that the AC connection is correct.
Ensure that the country data set has been entered correctly.
Saves selected answers, not proof of checks or completed work. Reopening starts at the first step; reassess safety and site conditions.
Every step and fork on one page for 9007
Before restarting the self-test, check the two things the entry names.
Ensure that the AC connection is correct.
Ensure that the country data set has been entered correctly.
Restart the self-test, which is the entry's last corrective measure.
Restart the self-test.
The self-test aborts again — This entry's corrective measures end with restarting the self-test. It documents no next step if the self-test aborts again and names no service contact here, and no other page of the manual gives a procedure for restarting it or for a repeat abort.
Remedy sourceSunny Tripower X events
Manufacturer / escalation handoff

Sources

ManufacturerSMA Sunny Tripower X (STPxx-50) event messages
ManufacturerSMA Australia: Sunny Tripower X 12/15/20/25
ManufacturerSMA Australia: AS/NZS 4777:2020 model and firmware requirements

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Good to know

Frequently asked

Where do these SMA fault codes come from?: Compiled from publicly available SMA inverter and battery documentation and field references, then rewritten for the trade. Wattbench is independent and not affiliated with SMA.
Which of these can I clear on site?: Some clear on their own once grid or environmental conditions return to normal. Anything involving DC isolation, AC switching, wiring or opening the unit is licensed electrical work. Isolate safely, follow AS/NZS 5033 and AS/NZS 3000 procedure and use appropriate PPE before touching a live system.
The exact code isn't listed. Why not?: Firmware and model variants differ, and manufacturers revise their code tables. We document the most common ones; for a variant that isn't here, check the unit's current manual or the manufacturer's service portal.
How current is this reference?: This reference was last reviewed on 2 August 2026. We revise entries when the underlying manufacturer documentation changes.

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