EV Home Charger Load Compatibility Checker
Will my home take an EV charger? A real headroom check against what the rest of the house already draws, not just whether there is a spare slot in the panel.
Your electrical panel
The number printed on the big switch at the top of the panel
A
Advanced / Custom Input — my panel
Overrides the amps above. Leave at 0 to use the breaker rating.
kVA
Some authorities want a margin left unused.
%
Filled in from your country.
V
What the house already uses
This fills in a typical existing demand. Change it below if you know the real number.
The most the house draws at once, not the monthly total
kW
Advanced / Custom Input — existing loads
From the utility or a smart meter. The most accurate figure there is. Leave at 0 to skip.
kW
%
The charger you want
Bigger is not always better — see the overnight range table in the result
A
It throttles the charger when the house is busy, instead of upgrading the service
Advanced / Custom Input — the charger
What the load-management device limits the charger to.
A
%
VA
Where the code lets a managed charger count at less than nameplate.
%
Your cars
nos
Cheaper to lay the conduit once
nos
Used for the overnight range table
Advanced / Custom Input — my cars
kWh
Lower is more efficient.
kWh/100km
Some energy is lost as heat in the charger and battery.
%
h
The installation
Along the route the cable will take, not straight through the wall
m
A garage consumer unit counts
Advanced / Custom Input — installation cost
Spare way in the existing panel, short run.
Result
Fill in your panel, your loads and the charger, then press “Check if it fits”.
Estimate only — verify with a licensed electrician/engineer and your local code authority before final installation.