2026 Rivian R1S Tri Max (22in): home charging cost in South Carolina

A 2026 Rivian R1S Tri Max (22in) draws 44.6 kWh per 100 miles per the EPA; at South Carolina's 16.04¢/kWh residential rate that's $7.15 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 55.4% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Tri Max (22in) charged at home in South Carolina costs about $1,072/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,331 a year.

Cost of a full charge

A 2026 Rivian R1S Tri Max (22in) needs roughly 165.4 kWh to reach its EPA-rated 371-mile range, which runs about $26.52 at 16.04¢/kWh in South Carolina.

2026 Rivian R1S Tri Max (22in) in South Carolina, ranked

This combination ranks 13,405 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Tri Max (22in) alone ranks 356 of 400 models for efficiency; South Carolina alone ranks 27 of 51 states for electricity price.

Before you install a home charger in South Carolina

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

Get quotes from local electricians for Level 2 charger installation in South Carolina before deciding.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. 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.