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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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    the rating of the main fuse should be less than the current carrying capacity of the cables. in other words the income should be restricted by the local fuse rating the as there is same size fuse if not bigger at the substation. There is no electronics involved to restrict the supply apart than protection units.

     

    On papers you should be able to have 7kW charger. Not sure what is the procedures with the DNO.  But telling them will be beneficial to upgrade the local power system if they find their utilisation plan won't hold for the local demand. 

     

    For easy comparison electric heaters are high in power demand but they work part of the hour not full hour like car chargers. That what makes DNO worry about EVs as they consume their peak demand for long period of time.

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  • 0

    the rating of the main fuse should be less than the current carrying capacity of the cables. in other words the income should be restricted by the local fuse rating the as there is same size fuse if not bigger at the substation. There is no electronics involved to restrict the supply apart than protection units.

     

    On papers you should be able to have 7kW charger. Not sure what is the procedures with the DNO.  But telling them will be beneficial to upgrade the local power system if they find their utilisation plan won't hold for the local demand. 

     

    For easy comparison electric heaters are high in power demand but they work part of the hour not full hour like car chargers. That what makes DNO worry about EVs as they consume their peak demand for long period of time.

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