kWh Index

Rolls-Royce charging at home

6 charging at home listed under Rolls-Royce.

ModelkWh/100miCosts to run
2024 Spectre41.48 (41.48–45.46 across 2 configurations)$7.61 per 100 miles
2024 Spectre Black Badge43.17 (43.17–45.88 across 2 configurations)$7.92 per 100 miles
2025 Spectre43.65 (43.65–47.84 across 2 configurations)$8.00 per 100 miles
2026 Spectre43.65 (43.65–47.84 across 2 configurations)$8.00 per 100 miles
2025 Spectre Black Badge45.43 (45.43–48.28 across 2 configurations)$8.33 per 100 miles
2026 Spectre Black Badge45.43 (45.43–48.28 across 2 configurations)$8.33 per 100 miles

Computed from electricity at 18.34¢/kWh, the EIA average for US in June 2026. A kilowatt-hour is 3412 BTU. This is a rate times a rating, not a prediction of your bill.

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Source: fueleconomy.gov, published by the U.S. Department of Energy and the U.S. EPA. Public domain. Consumption is the EPA’s combined figure; real-world consumption varies with speed, temperature and terrain.