$19.31full charge
The Q4 e-tron Premium 45 (82 kWh) costs about $19.31 to charge fully at Maryland's average home rate of 21.41¢/kWh, including ~10% charging loss (90.2 kWh from the wall). That is $6.71 per 100 miles.
EIA residential average, Maryland, 2026-07 (latest in this book). No Maryland gasoline series, so this uses PADD 1B regular, week of Oct 5, 2026.
At 1,000 miles a month and 30 mpg, home charging costs $67.05 and the gas car costs $145.43. The EV saves $78.38 a month at $4.363/gal. Both miles and mpg are editable on the calculator.
The listed DC fast-charge time to 80% is 28 minutes 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.