charging noddy question 3kw/7kw selection

[smoothound]

Hi folks - sorry if this is a noddy question....

Does the EVSE/Car system automatically detect the max power availability at the socket you plug the supplied mobile EVSE into - and moderate the charging load accordingly?

So if you plug it into a 13A 240V socket (UK) (2.8kW) or equivalent, it detects and does not overload this with a 7kw or 11kw load?

Or, do you have to tell the system manually what supply to expect, by adjusting charging settings?

cheers

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[Midlifecrisis]

It does it automatically. You will get about 10Amps off a 3 pin plug so will charge at about 2.1kW (approx 94% efficiency - you lose a bit) and about 6.6kW off a 7kW charge point. Haven’t used anything more than this but the same principles should apply. I think DC charging is more efficient than AC I.e. you lose less

 

[ThePaddyWan]

The EVSE will typically be set based on the available power that is supplied by your outlet (or line). Some EVSE will let you additionally select the amperage you'd like it to provide to the car, for example my JuiceBox is plugged into a 50-amp 240V socket, but I set it to 32-amp (instead of 40-amp it is capable of). From there the EVSE will communicate with the onboard charger on the car, which will charge (convert AC to DC) based on the available power provided by the EVSE.

 

[smoothound]

It does it automatically. You will get about 10Amps off a 3 pin plug so will charge at about 2.1kW (approx 94% efficiency - you lose a bit) and about 6.6kW off a 7kW charge point. Haven’t used anything more than this but the same principles should apply. I think DC charging is more efficient than AC I.e. you lose less

Thanks M - very helpful

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