Showing United States · real 2026 prices
Charging your EV from rooftop solar is about the cheapest way to fuel a car. See what charging from your own panels saves each year — versus the grid and versus fuel.
Adjust to match your setup.
Estimate only. "Fuel cost" values solar charging at the feed-in credit you give up. Real savings depend on when you charge, your tariff and how much solar you can divert to the car.
Transparent math you can trust — every figure is yours to change.
We split your charging between solar and the grid by the percentage you set. Solar energy is valued at the feed-in (export) credit you give up by using it yourself; grid energy at your standard rate. The saving versus all-grid charging is what solar buys you, and payback divides your setup cost by that yearly saving. CO₂ counts only the grid-charged share. Defaults reflect current US figures — adjust them to your setup. Estimates only, not financial advice.
If you have rooftop solar, charging from it is the cheapest mile you'll ever drive — the value hinges on your net-metering deal.
Where utilities now pay a low export rate (as in California under NEM 3.0 and a growing number of states), using that daytime power to charge instead of exporting it is worth far more; where full retail net metering still applies, the gap is smaller but daytime charging still avoids buying grid power. With the US home rate averaging ~17–18¢/kWh and DC fast-charging at 35–60¢, self-generated solar at a few cents is unbeatable. Shifting charging into daylight hours — a home charger on a timer helps — maximizes the benefit.
