Solar calculator: how much solar does your home need?
Enter your monthly units or your electricity bill (up to ₹2,00,000) and get your recommended system size, panels, roof space, inverter and yearly savings.
Your Home Energy Profile
Adjust consumption units or monthly bill amount to compute your custom rooftop sizing.
Quick household presets
₹
Units
Type any amount, or drag the slider.
₹360₹3.5k₹6.8k₹10k
Recommended system capacity
3.8 kW
Powers 100% of ~400 units/month requirement
Estimated Daily Consumption13.3 kWh/day
Estimated Annual Generation4,891 kWh
Approximate Panels Needed7 Panels
Estimated Roof Space Needed323 sq.ft (30 m²)
Recommended Inverter5.0 kW Single/Three-Phase
Estimated Annual Savings₹35,215/yr
Modules7 x 550W Modules
View engineering calculation formula
- Daily consumption
- 13.3 kWh/day
- Peak sun hours
- 4.3 hrs
- Performance ratio
- 82%
- Daily ÷ (sun hours × ratio)
- 3.8 kWp
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