What it costs to charge a 2026 Rivian R1S All-Terrain Tri Max (20in) in Massachusetts

A 2026 Rivian R1S All-Terrain Tri Max (20in) draws 49.8 kWh per 100 miles per the EPA; at Massachusetts's 30.06¢/kWh residential rate that's $14.98 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 6.5% cheaper per mile than gasoline in Massachusetts — charging at home costs a little less than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2026 Rivian R1S All-Terrain Tri Max (20in) in Massachusetts runs about $2,247 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $156 saved annually, at this mileage.

Filling up the 2026 Rivian R1S All-Terrain Tri Max (20in), in dollars

$49.29 — that's what Massachusetts's 30.06¢/kWh rate puts on the 164 kWh a 2026 Rivian R1S All-Terrain Tri Max (20in) needs for its full 329-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S All-Terrain Tri Max (20in) in Massachusetts ranks 20,018 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Tri Max (20in) ranks 388 of 400 EV models for raw efficiency, and Massachusetts ranks 49 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 Massachusetts before deciding.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Massachusetts has some of the highest residential electricity rates in the country — see the guide to why the cost varies so much by state for the full picture.