Can my panel handle an EV charger?
Answer it in one minute, before paying for an electrician visit. Pick your country first.
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How this calculator works
For US homes it uses the NEC 220.83 method, the same load calculation an electrician performs for an existing dwelling. Your general loads count at 100% for the first 8 kVA and 40% after that. Heating or cooling counts in full. The EV charger counts in full because it is a continuous load.
For UK homes it assesses your main fuse. A standard 7.4 kW charger draws 32 amps continuously. Homes with a 60 amp fuse and an electric shower usually need a load-managing charger. Most modern UK chargers include a CT clamp that pauses charging when the house is busy, which often avoids a fuse upgrade entirely.
What the results mean
A pass means a charger of that size likely fits your existing supply. It does not replace a proper assessment. In the US, the charger circuit needs a breaker rated 125% of the charging current, so a 48 amp charger needs a 60 amp breaker and thick wire. In the UK, your installer notifies the DNO and checks your earthing arrangement. Budget $500 to $2,000 in the US or roughly 800 to 1,200 pounds in the UK for a straightforward installation.
This tool gives a planning estimate using standard methods and typical appliance ratings. It is not an electrical assessment. Always have a licensed or qualified electrician confirm before installing equipment.