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Energy Production
Year-1 and lifetime kWh.
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Solar calculators
Sizing, production, cost, payback, batteries and incentives, each with the formula shown.
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How Many Solar Panels Do I Need
Panels, system kW and roof area from usage.
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Battery Bank Size Calculator
Off-grid battery bank from daily use, autonomy, and discharge depth.
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Solar System Size Calculator
Size a solar array from your usage and sun hours.
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Solar Panel Payback Calculator
Net cost, year-1 savings, payback, levelized cost of energy, and a loan or lease comparison.
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