Enter your battery size, efficiency, and electricity rate to see cost per charge, per mile, and versus a gas car.
Home charging is almost always cheaper per mile than gasoline, though public fast-charging rates can approach or exceed gas cost per mile depending on your area.
Because electricity is priced per kWh and gasoline per gallon, the fairest comparison is cost per mile, which normalizes both to the same unit of travel. Home charging overnight, especially on a time-of-use off-peak rate, is typically 60-70% cheaper per mile than gasoline — pair this with the charging time calculator to see the full picture.
Usually yes, often 2-3× the home electricity rate, since fast-charging networks price in equipment and demand-charge costs — home charging remains the cheapest option when available.
If your solar system already covers the cost, marginal charging cost from panels can approach zero, though it's worth accounting for the system's own payback separately.