Massachusetts home charging cost for the 2026 Rivian R1S Dual Max (20in)

In Massachusetts, home electricity runs 30.06¢/kWh — put a 2026 Rivian R1S Dual Max (20in)'s EPA-rated 42 kWh/100mi against that and 100 miles costs $12.62, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is cheaper than gas here: 21.2% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Rivian R1S Dual Max (20in) costs roughly $1,893 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 $510 a year.

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

Covering the 2026 Rivian R1S Dual Max (20in)'s EPA-rated 380-mile range takes about 159.5 kWh, which costs about $47.94 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 19,343 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Max (20in) alone ranks 298 of 400 models for efficiency; Massachusetts alone ranks 49 of 51 states for electricity price.

Next step: home charger installation

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.