Charging a 2027 Rivian R1S Premium Long Range (22in) at home in Massachusetts

At Massachusetts's residential electricity rate of 30.06¢/kWh, a 2027 Rivian R1S Premium Long Range (22in) (rated 39.9 kWh per 100 miles by the EPA) costs $12.01 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 25.1% cheaper per mile than gasoline in Massachusetts — charging at home is cheaper than gas here.

What a year of driving costs

Massachusetts owners putting 15,000 annual miles on a 2027 Rivian R1S Premium Long Range (22in) spend about $1,801 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $602 saved annually, at this mileage.

Filling up the 2027 Rivian R1S Premium Long Range (22in), in dollars

At Massachusetts's rate, fully covering this 2027 Rivian R1S Premium Long Range (22in)'s 410-mile EPA range costs about $49.22 (163.7 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 2027 Rivian R1S Premium Long Range (22in) in Massachusetts ranks 19,021 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Premium Long Range (22in) ranks 264 of 400 EV models for raw efficiency, and Massachusetts ranks 49 of 51 for cheapest residential electricity.

Getting set up to charge a 2027 Rivian R1S Premium Long Range (22in) at home

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

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.