Most EV owners charge at home overnight. The choice is mostly about how fast you need to charge and whether you plug the charger in or hardwire it.
Level 1 vs Level 2: which do I need?
Level 1 uses a normal 120-volt outlet and the cord that comes with many EVs. It is slow, often only a few miles of range per hour, but it can be enough if you drive short distances. A dedicated outlet is best.
Level 2 uses a 240-volt circuit, like a dryer, and charges several times faster. Most home installs are Level 2.
What size circuit does a Level 2 charger need?
EV charging is a continuous load, so the circuit must be rated at least 125% of the charger's output:
| Charger output | Circuit breaker |
|---|---|
| 16 A | 20 A |
| 24 A | 30 A |
| 32 A | 40 A |
| 40 A | 50 A |
| 48 A | 60 A (hardwired) |
Many chargers can be set to a lower output to fit a smaller circuit or a tight panel. The wire size follows the breaker and the type of wire; see the wire size calculator.
NEMA 14-50 outlet or hardwired charger?
- Outlet (NEMA 14-50): lets you unplug and take the charger with you. Use a quality, industrial-grade receptacle; cheap ones can overheat under hours of charging. Under current code, a 240-volt outlet in a garage or outdoors needs GFCI protection, and some chargers nuisance-trip on GFCI breakers.
- Hardwired: no plug to wear out, allows 48-amp charging, and avoids the outlet GFCI issue. Most electricians prefer hardwiring for daily charging.
How much does a home EV charger install cost?
IES starting-at prices, with your charger, up to 25 feet from the panel:
- NEMA 14-50 outlet circuit: from $1,510
- Hardwired, 40 A charging (50 A circuit): from $1,610
- Hardwired, 48 A charging (60 A circuit): from $1,840
Longer runs, outside conduit, or a panel that needs more capacity add to the price. If you are not sure your panel has room, read Can my panel handle an EV charger?
About these prices: rough starting-at prices from the IES price book. The final price depends on what we find on site, your utility and your city or county. Estimates are free.
Common questions
What breaker size do I need for a 40 amp EV charger?
A charger that delivers 40 amps continuously needs a 50-amp circuit, because continuous loads are sized at 125%.
Does a NEMA 14-50 EV outlet need GFCI protection?
Under recent code editions adopted in California, 240-volt receptacles in garages and outdoors generally need GFCI protection. Hardwiring the charger avoids the receptacle requirement and possible nuisance trips.
Is Level 1 charging enough?
For short daily drives it can be. Level 1 adds only a few miles of range per hour, so most owners who drive more choose Level 2.
General information for California homes under the California Electrical Code (based on the NEC). Local rules and inspectors can vary. Not a substitute for an on-site inspection. Never work inside a panel, at the meter or on live circuits.