Charging a 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires) at home in South Carolina

At South Carolina's residential electricity rate of 16.04¢/kWh, a 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires) (rated 36.8 kWh per 100 miles by the EPA) costs $5.9 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 63.2% cheaper per mile than gasoline in South Carolina — charging at home is much cheaper than gas here.

What a year of driving costs

South Carolina owners putting 15,000 annual miles on a 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires) spend about $884 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,518 saved annually, at this mileage.

Cost of a full charge

At South Carolina's rate, fully covering this 2027 BMW i7 xDrive50 Sedan (21 inch Summer Tires)'s 364-mile EPA range costs about $21.46 (133.8 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 (21 inch Summer Tires) in South Carolina ranks 8,919 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i7 xDrive50 Sedan (21 inch Summer Tires) ranks 184 of 400 EV models for raw efficiency, and South Carolina ranks 27 of 51 for cheapest residential electricity.

Before you install a home charger in South Carolina

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.

Ask a licensed South Carolina electrician to quote the install before this math becomes a real decision.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 16.04¢/kWh, South Carolina sits in the middle of the national range — the guide to why charging cost varies by state shows where.