Solar PV Panel Sizing Calculator India

Disclaimer: For estimation purposes only. Actual solar generation depends on site-specific shading, tilt, temperature and soiling. Dr Darla accepts no responsibility for decisions based on these estimates. Consult a certified solar installer.

Daily energy consumption

Daily electricity consumption10kWh/day

State (sets peak sun hours)

Peak sun hoursAuto-filled from state

Panel & system details

Panel wattage (Wp)

System efficiency (%)~75–85% typical

Panel area (m²)~2.0 m² for 400 Wp

System cost (₹/kWp installed)₹55,000–80,000 typical (2024)

Electricity tariff (₹/kWh)

Full breakdown

System size (kWp)
Daily load ÷ (Peak sun hours × System efficiency)

Panels needed
System kWp × 1000 ÷ Panel Wp — rounded up

Annual generation
System kWp × Peak sun hours × 365 × Efficiency

Annual savings
Annual generation × Electricity tariff

Payback period
Total system cost ÷ Annual savings

⚠ Peak sun hours and costs indicative as of 2024. Actual generation varies with shading, tilt and temperature.

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