Charging a 2027 BMW i7 xDrive50 Sedan (20 inch All-Season Tires) at home in Maryland
At Maryland's residential electricity rate of 21.27¢/kWh, a 2027 BMW i7 xDrive50 Sedan (20 inch All-Season Tires) (rated 37.4 kWh per 100 miles by the EPA) costs $7.96 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 50.3% cheaper per mile than gasoline in Maryland — charging at home is much cheaper than gas here.
Annual cost, at 15 thousands miles a year
Maryland owners putting 15,000 annual miles on a 2027 BMW i7 xDrive50 Sedan (20 inch All-Season Tires) spend about $1,195 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,208 saved annually, at this mileage.
Cost of a full charge
At Maryland's rate, fully covering this 2027 BMW i7 xDrive50 Sedan (20 inch All-Season Tires)'s 354-mile EPA range costs about $28.19 (132.5 kWh) — the energy the EPA test actually used, not the battery's rated size.
How this compares nationally
Among all 20,400 state-and-model combinations this site tracks, charging a 2027 BMW i7 xDrive50 Sedan (20 inch All-Season Tires) in Maryland ranks 14,991 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i7 xDrive50 Sedan (20 inch All-Season Tires) ranks 204 of 400 EV models for raw efficiency, and Maryland ranks 39 of 51 for cheapest residential electricity.
Next step: home charger installation
Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.
Line up a few Maryland electrician quotes for Level 2 install before you commit either way.
More on how this number was built
The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Maryland's 21.27¢/kWh compares? The guide to charging cost by state ranks every state side by side.