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

In Rhode Island, home electricity runs 29.45¢/kWh — put a 2026 Audi Q4 45 e-tron's EPA-rated 29.4 kWh/100mi against that and 100 miles costs $8.66, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 45.9% cheaper per mile than gasoline in Rhode Island — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Rhode Island owners putting 15,000 annual miles on a 2026 Audi Q4 45 e-tron spend about $1,299 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,104 saved annually, at this mileage.

Cost of a full charge

At Rhode Island's rate, fully covering this 2026 Audi Q4 45 e-tron's 288-mile EPA range costs about $24.94 (84.7 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 Audi Q4 45 e-tron in Rhode Island ranks 15,998 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 Rhode Island ranks 47 of 51 for cheapest residential electricity.

Before you install a home charger in Rhode Island

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 Rhode Island 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. Rhode Island 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.