Estimate solar output, system size, panel quantity, savings and payback using editable assumptions. These tools are designed for Australian conditions and let you replace every important default with your own figures.
Solar savings calculator
Estimate annual generation, bill savings and simple payback.
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Solar system size calculator
Estimate a suitable solar size from daily electricity usage and location.
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Solar panel calculator
Estimate panel quantity, actual array size and approximate roof area.
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Solar output calculator
Estimate daily, monthly and annual solar generation by Australian location.
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Solar payback calculator
Test simple payback and long-term gross savings assumptions.
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Using solar calculators well
Start with your actual electricity usage and current tariff. Treat production and savings separately: generation depends on system size and location, while financial value depends heavily on self-consumption, export rates and installed cost.