Level 2 charger power specifications have gotten complicated with all the different amperages and claims flying around. As someone who installs these systems throughout the Pacific Northwest, I learned everything there is to know about what Level 2 chargers actually deliver. Today, I’ll share it all with you.
AC vs DC at Level 2
Probably should have led with this section, honestly — Level 2 chargers are AC, not DC. They deliver alternating current at 240 volts to your vehicle, which converts it to DC internally using the car’s onboard charger.
Power Levels Explained
That’s what makes Level 2 specifications endearing to us efficiency types — the math is straightforward:
- 240V × 32A = 7.7kW (most common home installation)
- 240V × 40A = 9.6kW
- 240V × 48A = 11.5kW (maximum typical residential)
What Limits Your Speed
Your car’s onboard charger caps how fast it can accept power. A vehicle with a 7.2kW onboard charger can’t use all the power from an 11.5kW charging station. Check your vehicle’s specifications before investing in maximum-power home equipment.
The Practical Answer
A 32-amp (7.7kW) charger handles most daily driving needs with overnight charging. Higher power installations help if you drive extensively or have a vehicle with a high-capacity onboard charger.
