EVSE (EV Charger)
Electric Vehicle Supply Equipment: the wall box everyone calls a charger. Technically the charger lives inside the car; the EVSE is the smart, safety-interlocked power delivery between your panel and the vehicle.
The distinction explains real behavior: the EVSE negotiates with the car over the connector's pilot signal, telling it the maximum current available, and the car's onboard charger converts AC to DC for the battery. That is why the same wall unit charges different cars at different speeds, and why a 48-amp EVSE on a car with a 32-amp onboard charger delivers 32.
Residential EVSE decisions reduce to three: amperage (16 – 80 amps, with 40 – 48 the sweet spot), hardwired versus plug-in (hardwired is cleaner and required above 48 amps), and smart features (scheduling for off-peak rates, load sharing for two-EV homes). The connector question resolved itself: NACS (the Tesla plug) is becoming the North American standard, with adapters bridging the transition.
Talking to a contractor about this?
Run the project past a licensed electrical pro first. Calls are answered around the clock and routed to a pro serving your area.
- Hardwired vs Plug-In EVSE : The two ways to connect a home EV charger: hardwired directly into the circuit, or plugged into a NEMA 14-50 outlet.
- Smart Panel : An electrical panel with metering and software on every circuit (Span, Leviton, Schneider Pulse): see what each circuit uses live, control loads remotely, and orchestrate solar, battery and EV charging.
- Low-Voltage Wiring : The 12 – 24-volt systems running alongside house wiring: doorbells, thermostats, landscape lighting, network cable, security sensors.