What it costs to charge a 2026 Rivian R1S Tri Max (22in) in Massachusetts

In Massachusetts, home electricity runs 30.06¢/kWh — put a 2026 Rivian R1S Tri Max (22in)'s EPA-rated 44.6 kWh/100mi against that and 100 miles costs $13.4, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 16.4% cheaper per mile than gasoline in Massachusetts — charging at home is cheaper than gas here.

2026 Rivian R1S Tri Max (22in): yearly cost in Massachusetts

Home charging this 2026 Rivian R1S Tri Max (22in) in Massachusetts runs about $2,010 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $393 saved annually, at this mileage.

Filling up the 2026 Rivian R1S Tri Max (22in), in dollars

$49.71 — that's what Massachusetts's 30.06¢/kWh rate puts on the 165.4 kWh a 2026 Rivian R1S Tri Max (22in) needs for its full 371-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Tri Max (22in) in Massachusetts ranks 19,681 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Tri Max (22in) ranks 356 of 400 EV models for raw efficiency, and Massachusetts ranks 49 of 51 for cheapest residential electricity.

Before you install a home charger in Massachusetts

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.

Line up a few Massachusetts electrician quotes for Level 2 install before you commit either way.

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.