Free, accurate calculators for solar, EVs, heat pumps, and home batteries. Powered by 2026 rates, rebates, and real utility data — no email required.
Trusted by homeowners comparing quotes. Built by energy nerds. Updated quarterly with new incentives.
Each calculator uses your location, utility rate, and real 2026 incentive data. Results in under a minute.
Find out the true payback period and 25-year profit of rooftop solar, after state incentives and your utility's net-metering policy.
Calculate →5-year total cost of ownership: fuel, maintenance, insurance, depreciation — compare any EV vs any gas car.
Calculate →See annual savings versus gas or oil heat, and whether the 2026 HEAR/HOMES rebates make the switch worth it.
Calculate →How many kWh of battery do you actually need for backup, solar shifting, or time-of-use arbitrage?
Calculate →Average U.S. household fuel savings from switching from a gas car to an EV at 12,000 mi/yr.
Typical heating-cost reduction when swapping oil/propane for a modern cold-climate heat pump.
Typical solar payback in sunny states with net metering. Panels last 25-30 years.
State + federal rebates still available on heat pumps and home electrification in 2026.
Most "savings calculators" are built by solar installers or car dealers. Their numbers are designed to get you to pick up the phone. Ours aren't.
We pull public utility data, real installation costs, and current 2026 incentive rules so you can compare apples to apples. Every assumption is editable. Every output is sourced.
If you end up wanting quotes from real installers after running the numbers, we'll connect you with a few vetted partners — but only after you've seen the math yourself.
They use published utility rate tables, the latest federal/state incentive schedules, and installation costs pulled from industry reports (NREL, SEIA, EIA). Your quote will vary — but our payback estimates are within ±15% of what installers quote, based on our benchmarking against 200+ real quotes.
No. We don't require email to use the calculators. If you opt into "get quotes from installers," we share your info only with the 2-3 installers you approve — never a broker network.
Yes, though the federal residential solar tax credit stepped down at the end of 2025. State incentives, utility rebates, and the Inflation Reduction Act's HEAR/HOMES heat-pump rebates remain through 2032. Our calculators auto-adjust to your location.
Utility rates and incentives are refreshed quarterly. Car/equipment models are updated as manufacturers publish new ranges and efficiency specs.