Massachusetts home charging cost for the 2027 Rivian R1S Quad (22in)

At Massachusetts's residential electricity rate of 30.06¢/kWh, a 2027 Rivian R1S Quad (22in) (rated 44.4 kWh per 100 miles by the EPA) costs $13.34 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. Charging at home is cheaper than gas here: 16.7% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2027 Rivian R1S Quad (22in) costs roughly $2,001 a year to charge at home in Massachusetts, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $402 a year.

Cost of a full charge

Covering the 2027 Rivian R1S Quad (22in)'s EPA-rated 374-mile range takes about 166 kWh, which costs about $49.88 at Massachusetts's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 19,660 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Quad (22in) alone ranks 348 of 400 models for efficiency; Massachusetts alone ranks 49 of 51 states for electricity price.

Before you install a home charger in Massachusetts

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

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.