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

A 2027 Rivian R1S Quad (22in) draws 44.4 kWh per 100 miles per the EPA; at Maryland's 21.27¢/kWh residential rate that's $9.44 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 41.1% 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 $1,416 a year to charge at home in Maryland, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $987 a year.

Filling up the 2027 Rivian R1S Quad (22in), in dollars

Covering the 2027 Rivian R1S Quad (22in)'s EPA-rated 374-mile range takes about 166 kWh, which costs about $35.3 at Maryland's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

Where this ranks

This combination ranks 16,879 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; Maryland alone ranks 39 of 51 states for electricity price.

Before you install a home charger in Maryland

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 Maryland 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. Curious how Maryland's 21.27¢/kWh compares? The guide to charging cost by state ranks every state side by side.