Rooftop Solar Savings Calculator
Model your KSEB telescopic bill, PM Surya Ghar subsidy, net-metering banking and loan EMI in real time. Adjust the sliders to see your payback and 25-year savings instantly.
1 · Household Consumption
Two seasons: normal months and a vacation cycle when extended family visits. KSEB bills every 2 months.
Non-telescopic cliff hit. Above 250 units/month (500 bi-monthly) every unit is billed at a flat penalty band — telescopic slab benefits are forfeited entirely.
Current KSEB bill — no solar
Energy charge + ₹150 fixed/cycle + 10% duty. Verify slab rates against your KSEB bill.
2 · Solar System
PM Surya Ghar subsidy auto-caps for 3 kW and above. Flat concrete roofs need an elevated frame to stay usable.
3 · SBI / Jan Samarth Loan
Concessional ~5.75% applies while principal stays under ₹2,00,000; larger systems shift to commercial tiers (~7.9%+).
Total repayment over 5 yr: ₹1,47,354 (principal ₹1,27,800 + interest ₹19,554). Longer tenure lowers the EMI but raises total interest.
Annual cash flow
EMI exceeds savings during repayment; flips positive once the loan closes.