Query EV charging point installation

Ectophile

ElefantEd said:

Grey_Critic said:

There are various problems with HOME chargers - one is they have had to reduce the voltage otherwise they can trip out.

Why would a home charger reduce the voltage? And how - I very much doubt that the unit has a transformer in it?

They will reduce the current to avoid overheating, a sensible precaution, though with a properly installed set up (cables of the correct diameter for example) I doubt this would kick in very often.

The voltage in high voltage DC chargers at public charging points does reduce as the battery becomes fuller (usually becomes noticeable after about 80% charge) but that's a different issue.

I think "they" means your local DNO.  Electricity supplies in this country are meant to be 230V with a tolerance of +10% or -6%.  So 253V down to 216V.

But so much local infrastructure was installed before anyone had heard of solar panels or EV chargers.  It's not unknown for the supply voltage to go out of range, particularly on a sunny day when all the solar panels are pushing current the "wrong way" through the local substation transformer..