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

In Massachusetts, home electricity runs 30.06¢/kWh — put a 2026 Rivian R1S Quad Max (20in AT)'s EPA-rated 50.1 kWh/100mi against that and 100 miles costs $15.06, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 6% cheaper per mile than gasoline in Massachusetts — charging at home costs a little less than gas here.

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

Massachusetts owners putting 15,000 annual miles on a 2026 Rivian R1S Quad Max (20in AT) spend about $2,259 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $144 saved annually, at this mileage.

Filling up the 2026 Rivian R1S Quad Max (20in AT), in dollars

At Massachusetts's rate, fully covering this 2026 Rivian R1S Quad Max (20in AT)'s 325-mile EPA range costs about $48.95 (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 Massachusetts ranks 20,026 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 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.

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

More on how this number was built

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