Indicative rooftop solar planning
Rooftop Solar Size & Savings Calculator
Estimate solar capacity from monthly electricity use, sun hours, performance ratio, roof area and user-entered tariff.
Your result
Enter measured or nameplate values to calculate.
- Usage-matched capacity
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- Roof-area limit
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- Indicative generation
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- Approx. panel count
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- Energy-value ceiling
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Method
Usage-matched kW = monthly kWh ÷ (30 × peak-sun-hours × performance ratio). Roof limit and panel count are shown separately; savings cannot exceed entered grid-energy value.
Important limits
Indicative only. Do not hard-code subsidy, export credit or price. Shading, orientation, structural capacity, inverter limits, DISCOM rules and site survey can change the result.