$15.55full charge
The i4 eDrive40 (81 kWh) costs about $15.55 to charge fully at Minnesota's average home rate of 17.45¢/kWh, including ~10% charging loss (89.1 kWh from the wall). That is $4.67 per 100 miles.
EIA residential average, Minnesota, 2026-07 (latest in this book). EIA weekly retail regular, Minnesota, week of Oct 5, 2026.
At 1,000 miles a month and 30 mpg, home charging costs $46.69 and the gas car costs $140.00. The EV saves $93.31 a month at $4.200/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.