Charging a 2026 Rivian R1S Quad Max (20in AT) at home in Oklahoma

A 2026 Rivian R1S Quad Max (20in AT) draws 50.1 kWh per 100 miles per the EPA; at Oklahoma's 13.37¢/kWh residential rate that's $6.7 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 58.2% cheaper per mile than gasoline in Oklahoma — charging at home is much cheaper than gas here.

2026 Rivian R1S Quad Max (20in AT): yearly cost in Oklahoma

Oklahoma owners putting 15,000 annual miles on a 2026 Rivian R1S Quad Max (20in AT) spend about $1,005 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,398 saved annually, at this mileage.

Cost of a full charge

At Oklahoma's rate, fully covering this 2026 Rivian R1S Quad Max (20in AT)'s 325-mile EPA range costs about $21.77 (162.8 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 2026 Rivian R1S Quad Max (20in AT) in Oklahoma ranks 12,169 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Quad Max (20in AT) ranks 392 of 400 EV models for raw efficiency, and Oklahoma ranks 5 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.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Oklahoma is one of the cheapest states for home electricity — the guide to why the cost varies so much by state covers what drives that.