2027 Rivian R1S Premium (20in): home charging cost in Maryland

A 2027 Rivian R1S Premium (20in) draws 42.9 kWh per 100 miles per the EPA; at Maryland's 21.27¢/kWh residential rate that's $9.12 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: 43.1% less than gas per mile, here specifically.

2027 Rivian R1S Premium (20in): yearly cost in Maryland

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 Rivian R1S Premium (20in) charged at home in Maryland costs about $1,368/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,035 a year.

Cost of a full charge

A 2027 Rivian R1S Premium (20in) needs roughly 128.6 kWh to reach its EPA-rated 300-mile range, which runs about $27.36 at 21.27¢/kWh in Maryland.

How this compares nationally

This combination ranks 16,514 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium (20in) alone ranks 314 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.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. At 21.27¢/kWh, Maryland sits in the middle of the national range — the guide to why charging cost varies by state shows where.