Start With Your Electricity Bill
To calculate your ideal rooftop solar plant size, review your electricity bills from the past 12 months to determine your average monthly consumption in units (kWh).
Quick Rule of Thumb:
- 1 kW of solar in Maharashtra produces approximately 4 to 4.5 units per day (about 120–135 units per month).
- If your monthly consumption is:
- 150–200 units: A 2 kW system is ideal.
- 300–400 units: A 3 kW system will virtually wipe out your electricity bills.
- 500–700 units: A 5 kW system is recommended.
Space and Roof Considerations
A 1 kW solar plant requires approximately 80 to 100 square feet of shadow-free rooftop space. High-rise elevated structures can also be installed to preserve terrace utility for family events and gardening.
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