$21.43full charge
The Solterra Limited (75 kWh) costs about $21.43 to charge fully at District of Columbia's average home rate of 25.98¢/kWh, including about 10% charging loss (82.5 kWh from the wall). That is $7.44 per 100 miles.
EIA residential average, District of Columbia, 2026-08 (latest in this book). No District of Columbia gasoline series, so this uses PADD 1B regular, week of Oct 19, 2026.
At 1,000 miles a month and 30 mpg, home charging costs $74.42 and the gas car costs $143.73. The EV saves $69.31 a month at $4.312/gal. Both miles and mpg are editable on the calculator.
The listed DC fast-charge time is 10–80% in 28 min (estimate) at up to 150 kW. A full home charge is a different session. This page prices the energy from the wall, not how long a Level 2 charger takes.
This page uses the residential rate. Public fast-charging prices are a separate scenario and are not included.