Energy & Solar Calculators
Work out what rooftop solar would really save on your own DISCOM's tariff, with the PM Surya Ghar subsidy, state top-ups and a 25-year cash flow.
- Solar ROI Calculator IndiaEnter your electricity bill and state to see the rooftop system you need, your PM Surya Ghar subsidy, payback period and 25-year return.
- Pune Solar Calculator (MSEDCL)Rooftop solar payback for Pune and the rest of MSEDCL's Maharashtra, on the FY 2026-27 MERC slabs, wheeling charge and 16% duty.
- Bangalore Solar Calculator (BESCOM)Rooftop solar payback for Bangalore homes on BESCOM's flat KERC tariff, fixed charge per kW and this year's true-up charge.
- Delhi Solar Calculator (TPDDL)Rooftop solar payback for North Delhi homes on Tata Power-DDL, with the Delhi top-up, generation incentive and 200-unit subsidy.
- Delhi Solar Calculator (BSES Rajdhani)Rooftop solar payback for South and West Delhi homes on BSES Rajdhani, with the Delhi top-up, generation incentive and BRPL's PPAC.
- Uttar Pradesh Solar Calculator (UPPCL)Rooftop solar payback for Lucknow, Noida and the rest of Uttar Pradesh, with the UPNEDA top-up of ₹15,000 a kW on UPPCL's slabs.
- Chennai Solar Calculator (TNPDCL)Rooftop solar payback for Chennai and Tamil Nadu on TNPDCL's bi-monthly slabs, with the state's free units taken into account.
- Hyderabad Solar Calculator (TGSPDCL)Rooftop solar payback for Hyderabad on TGSPDCL, where crossing 200 units a month moves every unit to a dearer table.
- Rajkot Solar Calculator (PGVCL)Rooftop solar payback for Rajkot and Saurashtra on PGVCL, using Gujarat's strong sunshine, the FPPPA charge and 15% duty.
- Jaipur Solar Calculator (JVVNL)Rooftop solar payback for Jaipur on JVVNL, with Rajasthan's ₹17,000 top-up and some of India's strongest sunshine.
- Kerala Solar Calculator (KSEB)Rooftop solar payback for Kerala on KSEB, where crossing 250 units a month moves every unit to a flat, higher rate.