Charging a 2026 Audi Q4 45 e-tron at home in California

A 2026 Audi Q4 45 e-tron draws 29.4 kWh per 100 miles per the EPA; at California's 33.17¢/kWh residential rate that's $9.75 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 39.1% cheaper per mile than gasoline in California — charging at home is cheaper than gas here.

Annual cost, at 15 thousands miles a year

California owners putting 15,000 annual miles on a 2026 Audi Q4 45 e-tron spend about $1,463 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $940 saved annually, at this mileage.

What one full charge costs

At California's rate, fully covering this 2026 Audi Q4 45 e-tron's 288-mile EPA range costs about $28.09 (84.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Audi Q4 45 e-tron in California ranks 17,189 for cost savings versus gas — 1 being the best deal nationally. Separately, the Audi Q4 45 e-tron ranks 48 of 400 EV models for raw efficiency, and California ranks 50 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 California 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. California has some of the highest residential electricity rates in the country — see the guide to why the cost varies so much by state for the full picture.