How many amps do I need?

Chargers run for hours, so electrical code limits them to 80% of the breaker rating:

40 A breaker	32 A · 7.7 kW · 24–30 mi per hour
50 A breaker	40 A · 9.6 kW · 30–37 mi per hour
60 A breaker	48 A · 11.5 kW · 36–45 mi per hour

A 40 A charger on a 50 A breaker suits most drivers. Check your car’s limit in the home charger calculator, and always use a licensed electrician.

Last reviewed September 2026.