- Level 1 uses a regular 120-volt outlet and adds roughly 5 miles of range per hour, according to the Alternative Fuels Data Center.
- Level 2 uses a 240-volt circuit and adds roughly 25 miles of range per hour on a typical 7.2 kW home unit.
- Level 2 installation should be done by a licensed electrician, and permits are often required.
- Charging on off-peak or EV rates can cut your home charging cost substantially.
The charging levels at a glance
| Level 1 | Level 2 (home) | DC fast charging | |
|---|---|---|---|
| Voltage | 120 V | 240 V (208 V in many commercial buildings) | High-voltage DC |
| Typical power | About 1.4–1.9 kW | Most home units around 7.2 kW; up to about 11.5 kW | 50 kW and up |
| Approximate range per hour | About 5 miles | About 25 miles at 7.2 kW | Much faster; public stations only |
| Where | Any suitable outlet | Garage, driveway, carport | Highway and public sites |
Range figures come from the US Department of Energy's Alternative Fuels Data Center and vary by vehicle efficiency, battery temperature and the car's onboard charger. In the UK, Europe and Australia, standard household voltage is around 230–240 V, so a basic plug-in charger is faster than a North American Level 1, and dedicated home chargers typically deliver around 7 kW on a single-phase supply.
Is Level 1 enough?
For many drivers, yes. The Alternative Fuels Data Center notes that many drivers can meet daily needs with the Level 1 cord that comes with the car, as long as there is a suitable outlet nearby. Twelve hours of Level 1 charging adds about 60 miles, more than most people's daily driving.
Level 1 works best if you drive under about 40 miles a day, park at home for 10 or more hours overnight, and have a plug-in hybrid or a modest EV battery. It struggles in very cold weather, when the car uses some power to warm the battery, and for drivers with long commutes or large trucks and SUVs.
Use a dedicated outlet in good condition, not an extension cord. A worn outlet can overheat under hours of continuous load. Have an electrician check it if you are unsure.
Worked example: daily charging time and cost
Say you drive 40 miles a day in an EV that uses 0.30 kWh per mile. Charging is not perfectly efficient; assume about 10% is lost between the wall and the battery.
Energy needed: 40 miles × 0.30 kWh = 12 kWh into the battery ÷ 0.90 = 13.3 kWh from the wall
Level 1 time (12 amps × 120 V = 1.44 kW): 13.3 ÷ 1.44 = about 9.2 hours
Level 2 time (7.2 kW): 13.3 ÷ 7.2 = about 1.9 hours
Cost at a standard rate of $0.17/kWh, close to the 2025 US residential average reported by the Energy Information Administration: 13.3 × $0.17 = $2.26 a day, or 13.3 × 365 = 4,855 kWh × $0.17 = about $825 a year.
Cost at an off-peak rate of $0.10/kWh: 4,855 × $0.10 = about $486 a year, a saving of roughly $340.
Level 1 and Level 2 cost about the same per kWh; Level 2 can be slightly more efficient because charging finishes faster. The bigger lever is when you charge. Read more about time-of-use rates, and compare driving costs in our guide to EV vs gas costs. Our EV cost calculator runs these numbers for your car and rate.
Installing a Level 2 charger
Level 2 charging requires a dedicated 240-volt circuit. This is not a DIY job. A licensed electrician should assess your panel, pull any required permits and install the circuit, and many jurisdictions require an inspection. The Alternative Fuels Data Center notes that local codes apply and some areas require a site plan to be approved first.
Circuit size and charging power
EV charging is a continuous load, so electrical codes in North America generally limit the charger to 80% of the circuit's rating.
| Circuit breaker | Max continuous charging current | Power at 240 V |
|---|---|---|
| 40 A | 32 A | About 7.7 kW |
| 50 A | 40 A | About 9.6 kW |
| 60 A | 48 A | About 11.5 kW |
Bigger is not always better. Your car's onboard charger caps the rate it can accept, and most households only need a few hours of Level 2 charging per night. A 40-amp circuit is plenty for many drivers and reduces the chance of needing a costly panel upgrade.
What drives installation cost
- Panel capacity: an electrician will do a load calculation. Older or smaller services may need an upgrade, which is often the largest cost.
- Distance: long wire runs from the panel to the parking spot add material and labor.
- Load management: smart chargers or load-management devices can share capacity with other appliances and sometimes avoid a panel upgrade.
- Hardwired vs plug-in: hardwired units avoid the wear issues of high-current outlets and are often recommended.
Hardware commonly costs from a few hundred dollars to around a thousand. Installation ranges from a few hundred dollars for a short, simple run to several thousand when a panel or service upgrade is needed. Prices vary widely by region, so get more than one quote. You can request free quotes from local installers.
Charger features worth paying for
- Safety certification: choose equipment listed by a recognized testing laboratory.
- Scheduling: lets you charge only during off-peak hours, though most cars can do this too.
- Cable length: make sure it reaches your charge port wherever you park.
- Outdoor rating: needed for driveways and carports.
- Utility program eligibility: some utilities offer rebates or special rates only for approved networked chargers.
Incentives
The US federal tax credit for home charging equipment does not apply to equipment placed in service after June 30, 2026, but many utilities, states and provinces still offer rebates or EV-specific rates. See our incentives page for current programs. Pairing EV charging with rooftop solar can lower your cost per mile further.
For more detail, see the Alternative Fuels Data Center's guide to charging at home.
Frequently asked questions
Can I install a Level 2 charger myself?
No. It involves a new high-current 240-volt circuit, and mistakes can cause fires or shocks. Use a licensed electrician, who can also handle permits and inspection.
Can I charge from a dryer outlet?
Some people use a shared or switched setup, but a dryer outlet and an EV charger should never run at once on the same circuit without proper load management. Ask an electrician to assess the safest option.
Should I charge to 100% every night?
Many manufacturers recommend a daily limit below 100% for some battery types, with full charges reserved for long trips. Check your vehicle's guidance.
Do I need Level 2 for a plug-in hybrid?
Usually not. Plug-in hybrid batteries are small enough that Level 1 typically refills them overnight.
Run your own numbers
Plug your bill, prices and climate into our free ev vs gas cost calculator — every assumption is editable.
This guide is general information, not financial, tax or engineering advice. Prices and incentives change — confirm with qualified local professionals and official program sources. See our methodology and disclosures.