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Frequently Asked Questions
What actually limits how fast a vehicle charges?
The smallest of three numbers.
The unit's own rating.
The vehicle's on-board charger.
And the battery's acceptance at that moment.
A fast unit cannot lift a slow car.
Where is the charger in an AC charge point?
Inside the vehicle.
The wall unit only switches and meters.
It agrees a current limit and closes a contactor.
So two cars on identical units charge at different rates.
And neither unit is faulty.
Why is a DC cabinet so much bigger?
Because the conversion moved into it.
Rectifiers, filters and control gear take room.
They make heat, so they need fans.
Fans make noise, which planning notices.
And the whole assembly needs a serious supply.
Does every parking bay need its own unit?
Rarely, at a workplace or a home.
Cars are parked far longer than they charge.
Shared units and a rotation cover more bays.
Destination and transit sites are the exception.
There the vehicle leaves as soon as it is full.
How is a building's spare capacity established?
By measuring, not by adding up nameplates.
A logger on the incoming supply for a week.
The peak it records is the honest figure.
Design load calculations flatter the answer.
And the peak is what trips the main.
Will one connector type fit every vehicle?
No, and the split is geographic.
Markets standardised on different plugs.
AC and DC use different contacts on the same face.
Older vehicles carry older standards.
Adaptors are not a general answer.
What fails most often once a site is live?
The cable and the connector.
They are handled, dropped and driven over.
Electronics inside a sealed enclosure rarely fail first.
Nor does the contactor.
Which is why leads are stocked as consumables.
Is a home installation different in kind from a workplace one?
In scale and in obligation.
A house has one supply and one car.
A workplace has several vehicles and a duty of care.
Metering, access control and billing enter.
So does the question of who pays for the electricity.
Should the equipment be networked?
It depends who is paying.
A private unit needs no back office.
Shared or public use needs authorisation and records.
Networking also brings remote diagnosis.
And it brings a subscription and a dependency.
What has to be settled before any equipment is chosen?
How much power the site can spare.
How long vehicles actually stand there.
Where the cable routes will run.
Who is allowed to use it.
Equipment selection falls out of those four.