Bottom line: EV chargers are continuous loads, so the circuit is typically sized at 125% of the configured charging current. Always follow the charger manual and local code; have a licensed electrician verify the final breaker, wire, and settings.
Quick recommendation#
| Decision point | Recommendation |
|---|---|
| Common breaker sizes | A 32A charger commonly uses a 40A circuit, a 40A charger commonly uses a 50A circuit, and a 48A charger commonly uses a 60A circuit. The charger must be configured so its continuous output matches the circuit. |
| Why 125% matters | EV charging is treated as a continuous load because it can run for hours. That is why the circuit is larger than the charging current. A breaker is not a speed setting; it protects the circuit. |
| What to confirm in the quote | Ask the electrician to document breaker size, wire type and gauge, charger output setting, permit status, and whether any load-management equipment is required. |
How to choose#
- Start with the electrical panel and parking location before choosing a charger.
- Match charger amperage to the circuit your electrician can safely install.
- Use smart scheduling when your utility offers time-of-use or EV-specific rates.
- Keep receipts, model numbers, permits, and installation records for rebates or tax paperwork.
Recommended next steps#
Run the charger finder, compare current top picks, and get an installation quote that documents circuit size, charger output, permits, and any panel work. If the installation is expensive, compare a lower-amperage setting or load-management option before approving a panel upgrade.