Solar Roof Top Calculator
Find out what size solar panel system you need to zero out your electricity bill, how much roof space it takes, and the estimated cost.
By Monthly Bill (₹)
By Monthly Units (kWh)
Solar Expert Tips
1
The 4-Unit Rule
In most parts of India, a 1 Kilowatt (1 kW) solar system generates an average of 4 units (kWh) of electricity per day over the course of a year.
2
Space Requirements
Modern polycrystalline or mono PERC panels require roughly 100 square feet of shadow-free rooftop space per 1 kW of installed capacity.
3
Net Metering
With an On-Grid system, you export excess power to the grid during the day and import at night. You only need to generate enough to match your total 24-hour usage to get a zero bill.