2027 Rivian R1T Premium (20in AT): home charging cost in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2027 Rivian R1T Premium (20in AT)'s EPA-rated 44.4 kWh/100mi against that and 100 miles costs $5.68, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 64.6% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 Rivian R1T Premium (20in AT) charged at home in Idaho costs about $852/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,551 a year.

What one full charge costs

A 2027 Rivian R1T Premium (20in AT) needs roughly 128.2 kWh to reach its EPA-rated 289-mile range, which runs about $16.41 at 12.8¢/kWh in Idaho.

How this compares nationally

This combination ranks 7,801 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T Premium (20in AT) alone ranks 343 of 400 models for efficiency; Idaho alone ranks 3 of 51 states for electricity price.

Before you install a home charger in Idaho

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

Line up a few Idaho electrician quotes for Level 2 install before you commit either way.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. 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.