EV charger panel fit check
Before buying a Level 2 charger, check whether your existing electrical panel has the spare capacity. This tool estimates your available headroom and whether a 240-volt charger fits without a service upgrade.
How it works
- Estimates your home's existing electrical demand.
- Compares it against your panel’s usable capacity (the 80% continuous rule).
- Tells you the largest charger amperage your panel can likely support.
What changes your result
- Your panel's service rating (100A vs 200A) and existing loads
- Whether big loads like AC, an electric range or dryer run at the same time
- The charger amperage you want — 32A versus 48A changes the headroom needed
- Whether load management or a lower-amp charger is an option
Frequently asked questions
Can my electrical panel handle an EV charger?
Many can. A 200-amp service often has spare capacity for a 40–48 amp charger, while a 100-amp panel may be tight depending on existing loads. This check estimates your headroom; an electrician confirms it with a full load calculation.
Do I need a panel upgrade for a Level 2 charger?
Not always. If your panel lacks headroom, a load-management device or a lower-amperage charger can often avoid a costly upgrade. Run the full load calculator to see your numbers before assuming you need a new service.
What circuit does a Level 2 charger need?
A dedicated 240-volt circuit, commonly 40–60 amps, on its own breaker. The breaker and wire must be sized to at least 125% of the charger’s continuous current — the breaker & wire calculator handles this.