Before you spend big on an energy upgrade, know when it pays back.
Honest, source-backed payback calculators for life's big energy decisions: solar, EVs, batteries, heat pumps, and efficient appliances, tuned to real prices, incentives, and grid rules.
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Two minutes, zero commitment
How it works
Pick the decision
Solar, EV, battery, heat pump, or appliances, each with its own inputs and formula.
Choose your market
India, the US, and the UK use different prices, incentives, and grid rules.
See the verdict
Get annual savings, payback, 5-year net, 10-year net, and a shareable result link.
The idea in one picture
Every calculator answers the same buying question.
What do I pay upfront, what do I save each year, how long until it pays back, and what is the net result after 5 or 10 years? Solar, EVs, batteries, heat pumps, and appliances all fit that model.
Each market still gets local rules and local prices, but the user experience stays simple: change the assumptions, read the verdict, and share the result.
Upfront cost
Quote, premium, installed cost, grants, or rebates.
Annual benefit
Fuel saved, power shifted, efficient kWh, or lower heating cost.
Payback years
How long before the annual benefit recovers the upfront spend.
Net result
5-year and 10-year outcome so the answer is not just a headline.
Three markets, one method
Choose your country
Subsidies, export rules, and prices are completely different in each market, so each gets its own data and its own math.
India
- -Solar subsidy, loan EMI, and state-level payback
- -EV, battery, heat-pump, and appliance calculators
- -India defaults tuned to local tariffs and incentives
United States
- -Solar payback after the residential credit expired
- -EV, battery, heat-pump, and appliance calculators
- -State-level rates, sun, and net-metering context
United Kingdom
- -Solar with 0% VAT, self-consumption, and SEG exports
- -Battery, EV, heat-pump, and appliance payback
- -UK defaults tuned to local tariffs and supplier rules
One platform for the whole energy stack.
Start with any decision, then compare the next upgrade without learning a new tool.
Built to be checked
Why you can trust the numbers
We don't sell your details
No sign-up, no quotes marketplace, no lead-selling. The calculator is the product, and it's free.
Sources on every page
MNRE & DISCOMs in India, EIA & DSIRE in the US, Ofgem & HMRC in the UK, cited where the numbers appear.
Current rules, not old ones
No expired incentives: US solar assumes no federal residential credit after 2025, and UK solar has no net metering.
Computed, not typed
Every table, chip, and worked example on the site is calculated from the datasets at build time.
Two minutes can save years of regret.
Pick your market, choose the purchase, and see the payback before you talk to a vendor.