2026 Rolls-Royce Spectre Black Badge (23"), ID Charging Cost

Charging a 2026 Rolls-Royce Spectre Black Badge (23 inch Wheels) at home in Idaho

A 2026 Rolls-Royce Spectre Black Badge (23 inch Wheels) draws 48.3 kWh per 100 miles per the EPA; at Idaho's 12.8¢/kWh residential rate that's $6.18 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 61.4% cheaper per mile than gasoline in Idaho, charging at home is much cheaper than gas here.

2026 Rolls-Royce Spectre Black Badge (23 inch Wheels): yearly cost in Idaho

Idaho owners putting 15,000 annual miles on a 2026 Rolls-Royce Spectre Black Badge (23 inch Wheels) spend about $927 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,476 saved annually, at this mileage.

What one full charge costs

At Idaho's rate, fully covering this 2026 Rolls-Royce Spectre Black Badge (23 inch Wheels)'s 251-mile EPA range costs about $15.51 (121.2 kWh), the energy the EPA test actually used, not the battery's rated size.

2026 Rolls-Royce Spectre Black Badge (23 inch Wheels) in Idaho, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rolls-Royce Spectre Black Badge (23 inch Wheels) in Idaho ranks 10,270 for cost savings versus gas, 1 being the best deal nationally. Separately, the Rolls-Royce Spectre Black Badge (23 inch Wheels) ranks 380 of 400 EV models for raw efficiency, and Idaho ranks 3 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.

Ask a licensed Idaho electrician to quote the install before this math becomes a real decision.

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset, see the methodology guide. Idaho is one of the cheapest states for home electricity, the guide to why the cost varies so much by state covers what drives that.