How to Prepare Your Home and Garage for an Electric Vehicle

Level 1 EV Chargers

With a Level 1 charger, one end of the cable plugs into your electric vehicle’s charge port. The other end plugs into an ordinary home 120 V outlet.

A Level 1 charger comes as part of most EV packages, so there is nothing extra that you need to purchase. Most garages already have a 120 V outlet. If one needs to be installed, the cost ranges from $130 to $300.

Level 1 chargers are the slowest type of EV charger, charging at a rate of about 2 to 5 miles per hour.

A short overnight charge of eight hours takes the vehicle to 40 miles. A 12-hour charge gives the vehicle a 60-mile range. Since most U.S. work commutes are less than 30 minutes one-way, that’s sufficient to get to work and back, even without a mid-day charge.

Level 2 EV Chargers

With a Level 2 charger, one end of the cable plugs into the electric vehicle’s charge port. The other end is hardwired into the home’s pre-installed EVSE wall station. The EVSE is powered by a 240/208 V outlet. In some cases, the other end of the cord plugs directly into the 240 V outlet, minus the wall station.

Level 2 EV chargers charge at a rate of about 10 to 20 miles per hour. That’s more than enough to charge up for the following day at work. Given that the median range for most EVs is over 250 miles, 10 hours on a Level 2 charger is enough for most trips.

Most EVs use a J1172 or J-plug for Level 2 charging; Tesla doesn’t have this direct option, but it does sell a J1772 and CHAdeM0 adaptor, which can cost from $150 to $200.

A Level 2 EV charger requires either a hardwired electrical connection or a NEMA 14-50 outlet on a dedicated circuit. Many EV chargers up to 40 A service utilize the plug-in connection type and can be installed by the homeowner.

What About Level 3 DC Fast Chargers?

Using 480 V power, DC Fast Chargers can charge up an EV at a rate that adds up to 10 miles more per minute of charging time. Infrastructure challenges still make residential Level 3 charging impossible.

EV Charger Costs

For Level 1 electric vehicle charging, the cost to install a charging station ranges from free to around $300. Most garages already have a 120 V outlet installed. If not, a qualified electrician can install one for up to $300. If you are handy, you can install your own 120 V outlet for less than $50.

For Level 2 EV charging at home, expect to pay at least $1,500 to $1,800 for a bundled package, including the charger and electrical installation.

A 240 V, 40 A Level 2 EV charging station, attached to a NEMA 14-50 outlet with a 20-foot cord J1772 cable, starts at about $200 to $400. This type of charging station is not Wi-Fi-equipped and it has no permanent wall station. Models with Wi-Fi and a wall-mounted station cost from $500 to $800.

Garage Space Considerations

The electric vehicle charger should preferably be installed on the same side of the vehicle’s charge port and as close as possible.

• Place the EV charger within 15 to 20 feet of the vehicle’s charge port. EV cords can be as long as 25 feet, with 18 to 20 feet being the norm.
• The EV charger and the 240 V outlet should be within about 3 to 4 feet of each other.
• The charger should be at least 18 inches off of the garage floor, preferably between 42 and 48 inches high.
• Make sure that the charger is within range of your home’s local Wi-Fi network or is able to access cellular communications.
• For two EVs in the same two-car garage, mount the EV charger on a wall between the two vehicles for equal access by both vehicles.

Safety Considerations

Unless you are experienced at working inside electric service panels and adding circuits, it’s usually best to have an electrician add the 240 V outlet.

Contact an experienced electrician if you want to hardwire the EV charger. Hardwiring means that you wire the charger directly into the electrical system rather than plugging it into a 240 V outlet.

How to Install an EV Charger

For Level 1 EV charging, simply connect the cord provided by the vehicle manufacturer to a 120 V wall outlet in the garage. For Level 2 EV charging, install a 240 V outlet near the intended location of the EVSE.

1. Apply For Permits

   To install a 240 V outlet in the garage or on the side of the house, first obtain a permit from your local permitting office. A plan review may be required.

2. Install 240 V Circuit Breaker

   A double circuit breaker configuration needs to be installed in two adjacent open slots of the electric service panel. After installing the circuit breakers, turn the breakers to the OFF position.

3. Run Electric Cable to EV Charger Location

   For 32 A or 40 A service, install 8 AWG cable to the circuit breaker. The cable can be hidden in the walls and ceiling of the garage. If the cable will be exposed on the surfaces, it must be contained within metal or PVC conduit.

   Tip

   For increased 48 A service, use the thicker 6 AWG cable. EVSEs in the 48 A and greater range may not have a plug-in option and must be hardwired only.

4. Install 240 V Outlet

   Install the 240 V outlet within a few feet of the intended charger location.

5. Attach Mounting Bracket to the Stud

   Attach the electric vehicle charger’s mounting bracket directly to a stud on the garage wall.

6. Turn on EVSE

   Plug the wall station into the outlet. Turn on the double circuit breakers on the electric service panel.

7. Attach Cable Holder (Optional)

   Some EV chargers have a cable holder that must be installed separately. Other chargers may have a built-in cable holder.