Every EV. One question: will your panel handle the charger?

EV Charger Compatibility FAQ

The questions EV shoppers ask before buying about home charging and panel capacity.

Which EVs need a panel upgrade to charge at home?

Almost no EV requires a panel upgrade in and of itself, what matters is your home's existing electrical load and the charger amperage you pick. A 24A or 32A charger fits most 200A panels and many 100A panels. A 48A charger is more demanding and may require a service upgrade if your panel is already loaded.

How fast does my EV charge on Level 2?

Level 2 charging speed depends on the lower of (a) your charger amperage and (b) the car's onboard charger rating. Most modern EVs accept 7.7 to 11.5 kW (32 to 48A); some accept 19.2 kW (80A) but rarely on home installs. Each car page on this site shows the maximum Level 2 rate and how long a full charge takes.

Does Tesla need a special charger?

Tesla vehicles use either NACS (newer) or the Tesla-proprietary plug (older). The Tesla Wall Connector is one option, but any NACS or J1772-with-adapter charger will work. The panel-capacity question is identical to any other EV, driven by the charger amperage, not the brand.

How do I pick the right size charger for my EV?

Right-size the charger to (a) your panel's spare capacity and (b) how many miles you drive per day. A 24A charger adds ~18 miles/hour and is enough for most drivers charging overnight. A 48A charger is twice as fast but often pushes a panel into needing an upgrade. The calculator and each car page show the recommended size for your driving habits.

Do older EVs have different charging needs than new ones?

Yes, older EVs (early Leafs, e-Golfs, i3s) often have onboard chargers limited to 3.3 to 6.6 kW (14 to 28A), which means a smaller charger is fine. Newer EVs commonly accept 11.5 kW (48A). Each car page shows the specific Level 2 maximum for that model.