Short answer: Level 1 (a regular 120-volt outlet) adds about 5 miles of range per hour, or roughly 40 miles overnight. Level 2 (240 volts) adds about 25 miles per hour, or a full battery overnight for most cars, according to the DOE’s Alternative Fuels Data Center. If you drive under about 40 miles a day and can plug in every night, Level 1 may be all you need.
Side by side
| Level 1 | Level 2 | |
|---|---|---|
| Power source | Standard 120 V outlet | 240 V circuit (like a dryer) |
| Power | about 1.9 kW | 2.9-19.2 kW (most home units up to 7.2 kW) |
| Range added per hour | about 5 miles | about 25 miles |
| Range added in 8 hours overnight | about 40 miles | about 180 miles |
| Equipment cost | Often included with the car | Hardware about $420-$700 |
| Installation | None if you have a nearby outlet | Electrician; a dedicated 40-60 amp circuit |
Figures from the AFDC and DOE Energy Saver; hardware prices from Jouleio (June 2026).
Which one do you need? A quick test
- Find your daily miles. Check your car’s trip meter for a typical week and divide by 7.
- Find your plug-in hours. How many hours is the car parked at home each night? Say 10 hours.
- Multiply: Level 1 gives about 5 miles × 10 hours = 50 miles a night.
- Compare. If your daily miles are comfortably below that number, Level 1 works. If not, or if you often take long trips back to back, get Level 2.
Also consider winter: cold weather can cut range a lot, which raises the energy you need to put back each night. See how much range EVs lose in winter.
When Level 2 is worth it
- You drive more than about 40-50 miles a day.
- Two EVs share one driveway.
- You’re on a time-of-use plan and want to finish charging inside a short cheap window.
- You want a full battery for surprise road trips.
Level 1 tips
- Use a dedicated outlet in good condition; avoid extension cords unless the carmaker approves a heavy-duty one.
- Have an electrician check older outlets that get warm. Hours of continuous load are harder on a circuit than a toaster.
- Cold weather slows Level 1 charging because some energy goes to warming the battery.
Cost to charge is the same per kWh
Level 1 and Level 2 cost about the same per kWh at home; Level 2 is a little more efficient, but the bill difference is small. What changes your cost is the electricity rate and when you charge. Our guide to home charging costs shows the math, and EV charger installation costs covers Level 2 setup.
FAQ
Is there a federal tax credit for a home charger? No longer. The 30C credit doesn’t apply to property placed in service after June 30, 2026 (IRS). Check your utility for rebates.
What is Level 3? DC fast charging at public stations, up to 500 kW, adding 100-200+ miles in about 30 minutes. It’s not installed at homes.
Does my car limit the speed? Yes. The car’s onboard charger caps Level 2 power; a 48-amp charger won’t help a car that accepts only 32 amps.