The most expensive surprise in a home EV charger install is not the charger. It is finding out your electrical panel does not have room for it. A service upgrade can cost more than the charger itself.
This calculator runs a simplified version of the load calculation electricians use for existing homes, then tells you the largest charger your panel can likely support and which of the chargers I have reviewed fit.
EV Charger Panel Check
Can your electrical panel handle an EV charger?
Answer a few questions about your home to see how fast a charger your panel can likely support, and which chargers fit.
This estimate uses a simplified version of the NEC 220.83 load calculation for existing homes. It’s a starting point, not a permit document. Have a licensed electrician confirm before you install. You’ll also need two free breaker slots, and the charger’s breaker must be rated at 125% of its amps (a 48A charger needs a 60A breaker). Range estimates assume about 3.3 miles per kWh, which is on the efficient end. Bigger EVs like trucks and SUVs add less range per hour.
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