2026 Rivian R1S All-Terrain Tri Max (20in): home charging cost in South Carolina

In South Carolina, home electricity runs 16.04¢/kWh — put a 2026 Rivian R1S All-Terrain Tri Max (20in)'s EPA-rated 49.8 kWh/100mi against that and 100 miles costs $7.99, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 50.1% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S All-Terrain Tri Max (20in) charged at home in South Carolina costs about $1,199/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,204 a year.

Cost of a full charge

A 2026 Rivian R1S All-Terrain Tri Max (20in) needs roughly 164 kWh to reach its EPA-rated 329-mile range, which runs about $26.3 at 16.04¢/kWh in South Carolina.

2026 Rivian R1S All-Terrain Tri Max (20in) in South Carolina, ranked

This combination ranks 15,055 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S All-Terrain Tri Max (20in) alone ranks 388 of 400 models for efficiency; South Carolina alone ranks 27 of 51 states for electricity price.

Next step: home charger installation

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.

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

Where these figures come from

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.