$24.58full charge
The i5 eDrive40 (84 kWh) costs about $24.58 to charge fully at New Hampshire's average home rate of 26.60¢/kWh, including ~10% charging loss (92.4 kWh from the wall). That is $7.93 per 100 miles.
EIA residential average, New Hampshire, 2026-07 (latest in this book). No New Hampshire gasoline series, so this uses PADD 1A regular, week of Oct 5, 2026.
At 1,000 miles a month and 30 mpg, home charging costs $79.29 and the gas car costs $144.77. The EV saves $65.48 a month at $4.343/gal. Both miles and mpg are editable on the calculator.
The listed DC fast-charge time to 80% is 31 minutes at up to 205 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.