EV charger guides

Choosing a level. ENERGY STAR's threshold is about 40 miles a day, and the Level 1 cordset that came with the car costs nothing. Read the comparison guide before the shopping guide — this is the step that saves the most money.

Checking the panel. AFDC notes some homes have insufficient capacity for Level 2 but a qualified electrician can add circuits. Get this assessed in person before you buy hardware, because it can add $1,500 to $4,000.

Permitting and installing. AFDC states installations must comply with local and state codes, that permits may be required, and that in many areas a site plan must be approved first. Use a certified electrical contractor and safety-certified equipment — ENERGY STAR warns that not everything on sale is certified.

Cutting the running cost. AFDC's worked example: 10.7 cents per kWh and 27 kWh per 100 miles gives about 3 cents a mile, or roughly $6 to fully charge a 200-mile EV. Actual cost depends on your rate, and AFDC notes some utilities offer residential time-of-use rates or other incentives for charging equipment owners. Ask yours — shifting charging to off-peak hours is often the largest single lever on your bill.

How to choose

Read the level comparison before shopping units

The most expensive charger is the one you didn't need. ENERGY STAR's 40-mile threshold settles most cases.

Get a written panel assessment

It's the input that decides both the charger and the budget.

Call the building department yourself

Which permit, what fee, is a site plan required, how many inspections, which NEC edition. Five minutes, and it holds your contractor to a standard.

Ask your utility about EV rates the same week

AFDC notes some utilities offer time-of-use rates for charging equipment owners. Enrolling can matter more to your bill than which charger you bought.

Consult the vehicle manufacturer's guidance

AFDC recommends checking manufacturer specifications on required charging equipment before buying equipment or electrical services.