Charging a 2026 Rivian R1S Performance Dual Large (22in) at home in South Carolina
A 2026 Rivian R1S Performance Dual Large (22in) draws 39.5 kWh per 100 miles per the EPA; at South Carolina's 16.04¢/kWh residential rate that's $6.33 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 60.5% cheaper per mile than gasoline in South Carolina — charging at home is much cheaper than gas here.
Annual cost, at 15 thousands miles a year
South Carolina owners putting 15,000 annual miles on a 2026 Rivian R1S Performance Dual Large (22in) spend about $950 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,453 saved annually, at this mileage.
Filling up the 2026 Rivian R1S Performance Dual Large (22in), in dollars
At South Carolina's rate, fully covering this 2026 Rivian R1S Performance Dual Large (22in)'s 329-mile EPA range costs about $20.83 (129.9 kWh) — the energy the EPA test actually used, not the battery's rated size.
Where this ranks
Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Performance Dual Large (22in) in South Carolina ranks 10,806 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Performance Dual Large (22in) ranks 251 of 400 EV models for raw efficiency, and South Carolina ranks 27 of 51 for cheapest residential electricity.
Getting set up to charge a 2026 Rivian R1S Performance Dual Large (22in) at home
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.