A Level 1 EV Charger is the simplest and most accessible way to charge an electric vehicle.
Although slower than Level 2 chargers, Level 1 charging remains important for EV drivers with short daily commutes,
plug-in hybrids (PHEVs), or limited ability to upgrade home electrical systems.
A Level 1 EV Charger uses a standard household 120-volt AC outlet (North America). It is typically included when you purchase a new EV or PHEV.
Level 1 charging operates at low power, but it is extremely convenient because it requires no installation and works in virtually any residential setting.
Technical Specifications
Parameter
Typical Value
Voltage
120V AC
Current
10–16A
Power Output
1.2–1.9 kW
Connector
SAE J1772 (Tesla requires adapter)
Charging Speed
~3–5 miles of range per hour
2. How Fast Is Level 1 Charging?
Level 1 charging is not fast, but it is sufficient for many EV drivers. Average charging speed:
1 hour of charging → 3–5 miles of range
10 hours overnight → 30–50 miles
This is why Level 1 charging is particularly effective for commuters, PHEV owners, and households with predictable daily driving habits.
3. Who Should Use a Level 1 Charger?
Drivers traveling less than 25–30 miles per day
PHEV owners with smaller battery packs
Renters or apartment residents who cannot install Level 2
Drivers needing a low-cost backup charging option
4. Advantages of Level 1 EV Chargers
Universally available – any standard outlet works.
No installation cost – plug-and-charge.
Gentle on batteries due to low charging current.
Low electrical load – suitable even for older homes.
5. Limitations of Level 1 Charging
Very slow for large EV battery packs
Not ideal for high daily mileage or multiple drivers
Outlet condition must be safe and stable
Shared circuits may overload during charging
6. Safety Considerations
Use a Dedicated Outlet
Avoid sharing the circuit with appliances such as space heaters, microwaves, or refrigerators.
Inspect the Outlet and Plug
Look for signs of:
Heat or discoloration
Loose plug connection
Damaged insulation
Avoid Extension Cords
EV charging draws continuous power for hours. Extension cords introduce voltage drop and overheating risks.
Keep Cable Elevated
Prevent the cable from sitting in water or being crushed by doors or vehicles.
Level 1 charging is very safe when the outlet, wiring, and equipment are in good condition.
7. When Should You Upgrade to Level 2?
You drive more than 30 miles per day
You own a long-range EV (60–120 kWh battery)
You need faster turnaround between trips
You share the vehicle with multiple drivers
Level 2 charging dramatically reduces charging time. But if your daily mileage is low, Level 1 may still serve you well at zero installation cost.
8. Frequently Asked Questions (FAQ)
Can Level 1 charge any EV?
Yes. Every EV sold today supports Level 1 AC charging.
Is Level 1 safe overnight?
Yes, provided the outlet and EVSE are in good condition.
Does Level 1 damage the battery?
No. Low-current AC charging is gentle and beneficial for long-term battery health.
Shop Level 1 & Level 2 EV Chargers
Looking for Level 1 or Level 2 chargers for your home garage? Explore well-reviewed EV chargers here:
