Before you spend big,know when it pays back.
Solar subsidy & payback calculator for India, all 36 states & UTs
Honest, source-backed payback calculators for India's big-ticket energy decisions. No inflated savings, no lead-selling, just the math, and where it comes from.
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- States & UTs
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- Max subsidy
- 0 yrs
- Panel life
Not in India? We cover three markets, each with local rates, incentives & rules.
India calculators
Calculate the next bill-saving decision
A visitor who starts with solar can continue into EV, battery, heat-pump, and appliance payback without leaving the platform.
EV vs petrol
Compare an electric car with a petrol car using Indian fuel prices, home charging, public charging, and your annual kilometres.
Open calculatorHome battery storage
Estimate whether a lithium home battery pays back from solar self-use, backup value, and avoided evening grid use.
Open calculatorHeat pumps
Compare a heat-pump water heater with a normal electric geyser using Indian electricity tariffs and household hot-water demand.
Open calculatorEfficient appliances
Estimate payback from upgrading ACs, refrigerators, fans, geysers, and lighting to efficient star-labelled appliances.
Open calculatorOne question, many purchases
"…but when does it pay for itself?"
We answer it one category at a time, starting where the subsidy money is biggest.
Rooftop Solar
Subsidy, net cost & payback, state by state
- ✓36 states & UTs covered
- ✓₹78,000 max central subsidy
- ✓Typical payback 4-6 years
EV vs Petrol
Compare petrol cost, charging cost, and EV premium
- ✓Home vs public charging
- ✓Annual fuel saving
- ✓Shareable result link
Inverter & Battery
Backup power that actually makes financial sense
- ✓Storage value per unit
- ✓Backup value
- ✓Simple payback
Heat Pumps
Heat-pump water heater vs electric geyser
- ✓COP math
- ✓Old vs new running cost
- ✓Net install cost
Efficient Appliances
5-star AC, heat pump, LED, worth the premium?
- ✓BEE label kWh/year
- ✓Old vs new running cost
- ✓Upgrade premium payback
Why this site exists
Most solar sites want your phone number. We want you to do the math.
Jump straight in
Most-used tools
Solar subsidy & payback calculator
Enter your bill, get size, subsidy & payback.
Solar loan EMI calculator
The ~7% PM Surya Ghar loan, monthly cost.
EV vs petrol calculator
Charging vs petrol cost, premium payback.
Home battery calculator
Storage, backup value, and payback.
Heat-pump calculator
Heat-pump water heater vs geyser.
Efficient appliances calculator
BEE label kWh/year savings.
Your state's rules
All 36 states & UTs, tariffs, top-ups, DISCOMs.
System prices by size
1kW to 10kW, cost, subsidy, roof space.
Numbers you can actually trust
Every figure traces to a stated assumption and an official source, government portals, regulators, and published tariff orders. We publish our formulas, date-stamp our data, and link you to the official portal where you actually apply. We don't sell leads or take installer commissions.
Learn before you buy