We'll estimate a starting system size based on your bill — you can still adjust the slider below.
Estimates only, based on typical Chennai pricing and generation assumptions. Actual cost, subsidy eligibility, and savings depend on your roof, shading, and consumption pattern — get a free site survey for exact numbers.
How This Calculator Works
Move the slider to any system size between 1kW and 10kW, or enter your average monthly electricity bill and click "Suggest Size" to get a starting point. The calculator then shows you:
- Estimated system cost — based on typical Chennai market pricing for that capacity
- PM Surya Ghar subsidy amount — using the official government subsidy slabs
- Net cost — what you'd actually pay after subsidy
- Estimated monthly savings — based on typical Chennai solar generation and electricity tariff assumptions
- Payback period — roughly how long until your savings cover your net cost
PM Surya Ghar Subsidy Slabs Used in This Calculator
| System Size | Subsidy Amount |
|---|---|
| Up to 1 kW | ₹30,000 |
| Up to 2 kW | ₹60,000 |
| 3 kW and above | ₹78,000 (maximum residential subsidy) |
Good to know: This tool gives you a fast, indicative estimate to help you plan — it isn't a substitute for a site survey. Your actual roof area, shading, structural condition, and household consumption pattern all affect the right system size and true cost, and only a proper survey can confirm those.
Frequently Asked Questions
How accurate is this solar subsidy calculator?
This calculator gives indicative estimates based on typical Chennai pricing and generation assumptions. Your actual cost, subsidy eligibility, and savings depend on your roof condition, shading, electricity tariff slab, and a proper site survey. Use it to get a ballpark figure, then request a free survey for exact numbers.
What subsidy amount will I actually receive?
Under the PM Surya Ghar Muft Bijli Yojana, residential systems receive ₹30,000 for 1kW, ₹60,000 for 2kW, and ₹78,000 for systems of 3kW and above — this ₹78,000 is the maximum residential subsidy regardless of how much larger the system is.
How is the payback period calculated?
Payback period is estimated by dividing your net cost after subsidy by your estimated annual savings from reduced electricity bills. This calculator uses an indicative generation and tariff assumption for Chennai; your actual payback period depends on your real consumption pattern and how much surplus power you export via net metering.
What system size is right for my home?
A rough starting point is your average monthly electricity bill, which this calculator uses to suggest a system size. But the right size ultimately depends on your available roof area, shading, and household consumption pattern — a free site survey gives you an exact recommendation.
Want these numbers confirmed for your actual roof? Book a free site survey with Arka Solar Energy — no obligation.