4 Daughters Electric sizes home EV chargers in Gilbert to the lower of two limits: your car's onboard charger and your panel's spare capacity. A 48-amp charger does nothing extra if your car only accepts 32 amps, and it can't go in at all if your service can't feed it. Match the charger to reality, not the spec sheet.
Start with your car, not the charger
Every EV has an onboard charger that caps how fast it accepts AC power. Many popular EVs top out around 32 to 48 amps of Level 2 charging; some accept less. Buying a 48-amp wall charger for a car that only accepts 32 does not charge it faster — the car sets the ceiling. So step one is checking your vehicle's onboard charging rate. For most households, even 32 amps easily refills a daily commute overnight.
Then check your panel's headroom
A Level 2 charger is a heavy continuous load, and a 48-amp charger needs more spare panel capacity than a 32-amp one. In older Gilbert homes with 125- or 150-amp service already running two ACs and electric water heating, the difference can decide whether you need a panel upgrade or not. Sometimes dialing the charger to a sensible amperage avoids an upgrade entirely — a real cost saving.
The Arizona garage factor
Our garages get brutally hot in summer, and heat matters for a continuous load. Proper wire sizing already accounts for temperature, but it's a reason not to over-spec on a whim and to have the circuit installed correctly for the conditions. A charger running at its rated current for hours in a 110°F garage is exactly why the circuit must be sized right, not just "big enough."
A simple way to decide
- Look up your EV's max onboard AC charging rate (amps or kW).
- Pick a charger that meets — not wildly exceeds — that rate.
- Let us run a load calculation to confirm your panel supports it.
- Set the charger's amperage to what your car and panel both allow.
Let the numbers decide
We'll match the charger and circuit to your specific car and service so you get full charging speed without overpaying or overloading. See EV charger installation for the process, and call (480) 896-0325 before you buy hardware.