Massachusetts home charging cost for the 2027 Rivian R1S Quad (20in AT)

In Massachusetts, home electricity runs 30.06¢/kWh — put a 2027 Rivian R1S Quad (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. Charging at home costs a little less than gas here: 6% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

At fueleconomy.gov's default of 15,000 annual miles, the 2027 Rivian R1S Quad (20in AT) costs roughly $2,259 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 $144 a year.

What one full charge costs

Covering the 2027 Rivian R1S Quad (20in AT)'s EPA-rated 325-mile range takes about 162.8 kWh, which costs about $48.95 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 20,024 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Quad (20in AT) alone ranks 390 of 400 models for efficiency; Massachusetts alone ranks 49 of 51 states for electricity price.

Getting set up to charge a 2027 Rivian R1S Quad (20in AT) at home

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

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.