Question 1

What is time-of-use pricing for EV charging?

Accepted Answer

Time-of-use (TOU) pricing is a utility billing structure where electricity costs more during high-demand periods (typically 4-9 PM on weekdays) and less during off-peak hours (nights and weekends). For EV owners who charge overnight, TOU plans can reduce charging costs by 30-60% vs flat-rate electricity pricing. Most major utilities in California, the Northeast, and Pacific Northwest offer TOU plans.

Question 2

When is the cheapest time to charge an EV?

Accepted Answer

The cheapest time to charge an EV is typically between 11 PM and 6 AM on a TOU rate plan. Off-peak rates commonly range from $0.05-0.10/kWh in states like California (E-ELEC rate), Colorado, and Texas. Some utilities also offer super-off-peak rates on weekends as low as $0.03-0.05/kWh.

Question 3

How much can I save with time-of-use EV charging?

Accepted Answer

A driver adding 1,000 miles per month at 3.5 miles/kWh (286 kWh/month) saves $14-43/month by switching from a $0.20/kWh flat rate to a $0.10/kWh off-peak TOU rate, or $170-520 per year. In high-rate states like California, savings can exceed $700/year for high-mileage drivers.

EV Time-of-Use Charging Savings Calculator