$22.20full charge
The Q4 Sportback e-tron Premium Plus 55 (82 kWh) costs about $22.20 to charge fully at New Jersey's average home rate of 24.61¢/kWh, including about 10% charging loss (90.2 kWh from the wall). That is $8.84 per 100 miles.
EIA residential average, New Jersey, 2026-08 (latest in this book). No New Jersey 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 $88.44 and the gas car costs $143.73. The EV saves $55.29 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 at up to 175 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.