Charging an electric vehicle at home is routine for most owners, but a Level 2 charger draws a lot of power for hours at a time. Understanding a few basics helps you keep the setup safe for your household, your car and your garage.
Why Level 2 charging needs care
Level 2 chargers run on 240 volts, the same type of supply used by an electric dryer or range. Compared with a standard 120-volt household outlet, they deliver much more power. Power is measured in kilowatts (kW). A 9.6 kW charger draws far more current than a lamp or a kitchen appliance, and it may run for many hours in a row.
Because of this continuous load, electrical codes limit how much current a circuit can carry for long sessions. A continuous load may use at most 80% of the breaker rating. In practice, a 40-amp charger needs a 50-amp circuit, and a 48-amp charger needs a 60-amp circuit and must be hardwired.
Key safety habits
- Use a circuit that matches the charger's rating, and do not share it with other large loads.
- Plug only into an outlet that is in good condition, properly grounded and installed to code.
- Keep the charger and cable off the floor where water can collect, and away from heat sources.
- Look for warm plugs, discoloration, a burning smell or a buzzing sound. Stop charging and have the outlet checked if you notice any of these.
- Do not use extension cords or power strips with a charger.
Hardwired versus plug-in installs
A plug-in charger connects to a dedicated receptacle such as a NEMA 14-50, which is a 240-volt, 50-amp outlet. A hardwired charger is connected directly to the circuit. Hardwired work should be done by a licensed electrician. Local permits and inspection may apply, so check with your local building department before the work starts.
Everyday checks
Once a month, look over the cable, the plug and the connector for cuts, cracks, exposed wires or bent pins. Make sure the charger's housing is not damaged. If something looks wrong, stop using the charger until it has been inspected.
Smoke and fire awareness
Keep a working smoke alarm near the garage, and know where your breaker panel is. If an outlet or breaker trips repeatedly, do not keep resetting it. That is a sign the circuit needs attention from a qualified electrician.
How this applies to EVIQO chargers
All five EVIQO chargers are 240-volt Level 2 units with a 25 ft cable. The 40A plug-in and NEMA 14-50 models need a 50-amp circuit. The 48A models need a 60-amp circuit and are hardwired. The 40A (9.6 kW) plug-in or 48A (11.5 kW) hardwired J1772 model can be installed either way, so choose the option that matches the circuit you have, and have a licensed electrician confirm the installation.