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Cart before the horse? (EV charging)

AncientMariner

Am looking at replacing our 1999 diesel engined car ideally with an EV.

Would obviously want to charge with a 7 kW unit so the question is would our existing Grey Series 7 II b cutout with an 80A fuse fitted be capable of 7 kW or only 3.6 kW. 

So before I even look at a car, I really need to know.  Emailed SP Energy Systems “Getting Connected” and get the reply, “Please be advised that when your installer submits the notification form for the charger, the property will be surveyed and anything required will be carried out as part of that.”  Ok then, I buy the car and then find out that I can only charge at the 3.6kW rate. I could of course have a charging point fitted first, but then would not be able to claim any subsidy or dealer offer.

Clive

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    Anyway, I have just put my clamp amp-meter set to MAX on a meter tail and if its battery holds out, I hope to see a max demand.  Which I think will be lower than I perhaps expected.

    Your meter will presumably show instantaneous maximum demand - whereas the fuse (and cables) are really only interested in thermally equivalent currents over a significant time (say tens or minutes or hours) - so the situation is likely to be a lot less worrying than even the clamp meter suggests.

       - Andy.

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    Anyway, I have just put my clamp amp-meter set to MAX on a meter tail and if its battery holds out, I hope to see a max demand.  Which I think will be lower than I perhaps expected.

    Your meter will presumably show instantaneous maximum demand - whereas the fuse (and cables) are really only interested in thermally equivalent currents over a significant time (say tens or minutes or hours) - so the situation is likely to be a lot less worrying than even the clamp meter suggests.

       - Andy.

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