The formula
Miles ÷ 100 × kWh per 100 miles × your rate. EPA energy figures already include charging losses.
An example
A car using 30 kWh per 100 miles, driven 1,000 miles a month, uses 300 kWh. At 18¢ that is $54 a month. A 30 mpg gas car over the same miles, at $4.20 a gallon, burns $140 of gas.
Your state matters
Home rates run from 12.7¢ in Nevada to 47.2¢ in Hawaii. Put in your state, or look up your rate on your bill.
Pay less
- Ask your utility about a time-of-use or EV rate. Charging late at night can cost much less.
- Set the charge schedule in the car, so you don't have to remember.
- Ask about utility rebates for a charger.