1. Lock the product identity
Start with the manufacturer, full model number and power class. A family datasheet may cover several variants in adjacent columns. Match the quote, datasheet, module label and design record; do not carry a value from a neighbouring model.
2. Read the rating conditions
Module nameplate values at Standard Test Conditions (STC) use 1,000 W/m² irradiance, 25 °C cell temperature and air mass 1.5. STC supports comparison under a common reference; it does not promise that output on a roof.
- Pmax: maximum power for the selected model at the stated condition.
- Voc and Isc: open-circuit voltage and short-circuit current used in limit checks.
- Vmp and Imp: voltage and current at the maximum-power point.
- Power tolerance: the manufacturer's permitted nameplate variation. Record it exactly rather than assuming it is positive-only.
- NMOT or NOCT table: if supplied, read its printed test conditions. Do not treat it as a site forecast.
3. Carry temperature into the design
Datasheets normally state temperature coefficients for power, voltage and current. Use the exact coefficient, unit and reference condition printed for that model. Cold cells can increase open-circuit voltage; hot cells change operating voltage and power. Apply the site's documented design temperatures and the required design method rather than a generic technology range.
Then verify the complete string against the inverter's MPPT window, start voltage, maximum input voltage, current and power limits, plus any other applicable system limit. A calculator result remains an estimate until the design inputs and requirements are checked.
4. Check the mechanical schedule
- dimensions, mass and approved clamping or mounting zones;
- front and rear mechanical load ratings and the conditions attached to them;
- maximum system voltage and overcurrent-protection rating;
- cable length, conductor size and the exact connector manufacturer and type;
- junction-box and enclosure ratings; and
- any environmental qualification relevant to the site.
Do not translate “compatible” connector wording into permission to mate unlike products. Follow the exact equipment and installation requirements.
5. Separate qualification, listing and site suitability
IEC 61215 covers design qualification and type approval for terrestrial PV modules. IEC 61730 covers module safety qualification. These are not substitutes for the Australian product-list check or for a site-specific compliant design.
For an Australian SRES installation, the Clean Energy Regulator requires the installed PV module and inverter models to appear on the approved product lists, and the components must be commissioned before their listing expiry. Check the live list against the complete model number.
6. Open the warranty documents
A module can have a product warranty for materials or workmanship and a separate performance warranty describing an output floor over time. Compare the actual warranty documents for:
- the covered model and warranty start date;
- the output curve or stated floor;
- exclusions and required records;
- repair, replacement, refund or pro-rata remedy; and
- labour, freight, removal and reinstallation costs.
A duration or degradation figure from another product family is not evidence for this module.
Fast handover record
Save the exact datasheet and warranty revision used for design, the current approved-list check, the module label photo and the final string schedule. That makes later commissioning, fault-finding and warranty work traceable.