Charging a 2027 Rivian R1S Performance (20in AT) at home in Maryland

At Maryland's residential electricity rate of 21.27¢/kWh, a 2027 Rivian R1S Performance (20in AT) (rated 49.8 kWh per 100 miles by the EPA) costs $10.6 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 33.8% cheaper per mile than gasoline in Maryland — charging at home is cheaper than gas here.

What a year of driving costs

Maryland owners putting 15,000 annual miles on a 2027 Rivian R1S Performance (20in AT) spend about $1,590 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $813 saved annually, at this mileage.

What one full charge costs

At Maryland's rate, fully covering this 2027 Rivian R1S Performance (20in AT)'s 329-mile EPA range costs about $34.87 (164 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Performance (20in AT) in Maryland ranks 18,012 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Performance (20in AT) ranks 386 of 400 EV models for raw efficiency, and Maryland ranks 39 of 51 for cheapest residential electricity.

Next step: home charger installation

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.

Line up a few Maryland electrician quotes for Level 2 install before you commit either way.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Maryland's 21.27¢/kWh compares? The guide to charging cost by state ranks every state side by side.