Charging a 2026 Mercedes-Benz EQS 580 4matic at home in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2026 Mercedes-Benz EQS 580 4matic's EPA-rated 35.6 kWh/100mi against that and 100 miles costs $5.11, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 68.1% cheaper per mile than gasoline in Washington — charging at home costs a fraction of what gas would here.

What a year of driving costs

Washington owners putting 15,000 annual miles on a 2026 Mercedes-Benz EQS 580 4matic spend about $767 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,636 saved annually, at this mileage.

What one full charge costs

At Washington's rate, fully covering this 2026 Mercedes-Benz EQS 580 4matic's 371-mile EPA range costs about $18.96 (132.2 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 2026 Mercedes-Benz EQS 580 4matic in Washington ranks 5,080 for cost savings versus gas — 1 being the best deal nationally. Separately, the Mercedes-Benz EQS 580 4matic ranks 160 of 400 EV models for raw efficiency, and Washington ranks 15 of 51 for cheapest residential electricity.

Before you install a home charger in Washington

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 Washington electrician quotes for Level 2 install before you commit either way.

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Washington's 14.35¢/kWh rate ranks 15 of 51 states; the state rate guide lays out the full spread.