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Frequently Asked Questions
Why is a wallbox the least disruptive installation?
Because the hard parts already exist.
A wall, a bay and a nearby board.
No excavation and no foundation.
Often a short cable run.
A morning's work rather than a project.
Does three phase make any car charge faster?
Only a car built to take it.
The vehicle's on-board charger decides.
A single phase car uses one phase and ignores the rest.
It draws the same as it would on a single phase unit.
With no fault anywhere.
What happens if the house is already near its limit?
The main trips at the worst moment.
Cooking and charging overlap in the evening.
A sensor on the incoming tails prevents it.
The unit then throttles itself instead.
Slow all night beats off altogether.
Tethered lead or a socket?
A lead is quicker in the rain.
A socket suits more than one vehicle.
It also keeps the cable indoors and dry.
A lead is exposed and eventually damaged.
Houses usually take the lead, shared parking the socket.
Can a wallbox go on an outside wall?
Yes, given the right sealing rating.
Driving rain and sun both matter.
So does a screen a person can read outdoors.
Height keeps the connector clear of splashing.
And out of casual reach.
Does a wallbox need its own protective device?
It needs earth fault protection suited to direct current.
A vehicle can leak unidirectional current.
Ordinary devices are blinded by that.
Some units include the protection internally.
Others require it upstream.
Is one unit enough for two cars at a house?
Usually, if they are parked overnight.
Six hours restores a normal day's driving.
Two cars in turn still finish before morning.
A second unit halves the shared supply anyway.
Unless the supply was upgraded first.