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Design and verify
Calculators, worksheets and references for equipment, strings, cables, batteries and grid constraints.
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Calculators and worksheets15
Solar System Size CalculatorTurn your daily energy use, location-specific sun hours and entered system losses into an indicative array size and panel count.Solar Payback CalculatorEstimate annual savings and payback period from system cost, generation, self-consumption, electricity rate and feed-in tariff.Solar Panel Power Density CalculatorFrom rated power and module dimensions, compute power density in W/m², module efficiency and panels needed per kilowatt.Single or Three-Phase Supply CheckUse visible main-switch or meter clues to identify a likely single- or three-phase supply without opening the switchboard.
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Solar STC Certificate Estimate (Australia)Estimate certificate count and an entered gross value from system size, zone rating, deeming years and certificate price.Battery STC & WA Rebate CheckEstimate battery STCs from the compliance-certification date and capacity, with a conditional WA programme amount for Synergy or Horizon Power areas.Solar Cable Voltage Drop CalculatorWork out voltage drop on a DC string or single-phase AC run from the entered length, current, conductor size, voltage and material.Roof Direction & Pitch CheckRecord a roof's direction and pitch, then read source-backed generation-timing guidance without an invented yield percentage.DC:AC Ratio (Inverter Load Ratio) CalculatorCalculate the ratio of entered array DC capacity to inverter AC rating, without prescribing an unsupported design band.Battery Backup Runtime CalculatorEstimate how long a battery can support a nominated essential load from usable capacity, backup reserve and conversion efficiency.AC Voltage Rise WorksheetCompare two entered voltage readings and document the rise in volts and percentage without applying a compliance verdict.Battery Charge-Time & Surplus PlannerEstimate energy needed and charge time from usable capacity, starting and target state of charge, surplus power and entered efficiency.Essential Load ScheduleTurn entered continuous loads and daily run-times into a simple backup power and energy schedule.Three-Phase Load Balance WorksheetCompare entered phase currents, identify the highest and lowest phase, and quantify the spread without asserting a compliance limit.Module & Inverter Compatibility WorksheetCompare entered string voltage and current against documented inverter input limits at the design conditions you supply.
Guides and references22
Network connection authoritiesOfficial Australian distributor connection pages for live approval and settings verification.HJT Solar Technology, ExplainedHow heterojunction cells use passivating contacts, what the architecture can support, and which exact-module figures installers must verify.Solar Cell Busbars & Multi-Busbar DesignHow fingers and collectors balance shading and resistance, why conductor count is not a quality score, and what installers should verify.AC vs DC Solar PanelsTrace conversion, MPPT, monitoring and battery coupling through string, optimiser and microinverter designs before choosing an architecture.
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Solar Panel Orientation & TiltA field workflow for matching azimuth and tilt to shade, interval load, tariffs, export limits, storage and the usable roof.How to Read a Solar Panel DatasheetVerify exact module identity, rating conditions, electrical and mechanical limits, approvals and warranty documents without borrowing generic figures.TOPCon Solar Cells, ExplainedHow TOPCon's tunnel-oxide passivating contact works, why it became mainstream, and which module-level figures installers must verify.Bifacial Solar Panels, ExplainedHow rear irradiance, bifaciality and array geometry affect output and current, and what installers must verify before relying on a gain estimate.LFP vs NMC: Home Battery ChemistryA field-safe comparison of LFP and NMC that separates chemistry tendencies from the exact product, warranty, installation and support evidence that decides suitability.Solar Export Limiting, ExplainedHow to read an Australian connection approval, distinguish fixed, zero and flexible export arrangements, and capture evidence without guessing network settings.Virtual Power Plants (VPP), ExplainedHow to separate VPP capability, enrolment and live dispatch, compare contract terms, and triage unexpected battery behaviour without changing settings blindly.Microinverters vs String InvertersCompare exact microinverter and string-inverter designs across MPPT allocation, shade, monitoring, failure boundaries and service access.Module and Inverter CompatibilityA complete compatibility check covering cold Voc, MPPT operation, current, parallel strings, connectors and exact model documentation.Battery Backup Architecture and Essential LoadsHow energy, power, transfer equipment and backed-up circuits combine to determine real outage behaviour.AS/NZS 5033Installation and safety requirements for photovoltaic (PV) arrays: DC-side layout, isolation, maximum array voltage, earthing and signage.AS/NZS 4777.1Installation requirements for grid-connected energy systems via inverters.AS/NZS 3000The Wiring Rules: the overarching standard for the safety of electrical installations.AS/NZS 3008.1Selection of cables: current-carrying capacity (ampacity) and voltage-drop sizing for conductors.AS/NZS 5139Safety of battery systems used with power conversion equipment: installation, location, and protection of battery energy storage.IEC 61215Design qualification and type approval for crystalline-silicon terrestrial PV modules: performance and durability testing.IEC 61730 (Parts 1 & 2)Photovoltaic module safety qualification: construction requirements and safety testing.AS/NZS 4509Stand-alone power systems: design and installation of off-grid systems.