Can your panel handle an EV charger?

A rough NEC-style estimate. Pick your panel size, check your big loads, and see whether a 40 A or 48 A charger fits — or whether load management beats a panel upgrade.

Main panel size 200 A

Major existing loads (check all that apply)

Charger you want 48 A (60 A breaker)

This is an estimate, not an electrician

Real load calculations follow NEC Article 220 and account for demand factors, square footage, and which loads run simultaneously. This tool uses a conservative simplification. Always have a licensed electrician do the official load calculation before buying — but this tells you which conversation you're walking into.

If the numbers don't fit, you have two outs before a $1,500–$3,000 panel upgrade: a lower-amperage charger (40 A is plenty overnight), or a charger with dynamic load management like theEmporia Pro, which charges at full speed only when the house has headroom.