2026 Rivian R1S All-Terrain Dual Max (20in): home charging cost in Maryland

A 2026 Rivian R1S All-Terrain Dual Max (20in) draws 43.2 kWh per 100 miles per the EPA; at Maryland's 21.27¢/kWh residential rate that's $9.19 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: 42.6% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S All-Terrain Dual Max (20in) charged at home in Maryland costs about $1,379/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,024 a year.

What one full charge costs

A 2026 Rivian R1S All-Terrain Dual Max (20in) needs roughly 159.9 kWh to reach its EPA-rated 370-mile range, which runs about $34.02 at 21.27¢/kWh in Maryland.

2026 Rivian R1S All-Terrain Dual Max (20in) in Maryland, ranked

This combination ranks 16,621 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S All-Terrain Dual Max (20in) alone ranks 333 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. At 21.27¢/kWh, Maryland sits in the middle of the national range — the guide to why charging cost varies by state shows where.