Charging

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This topic contains 67 replies, has 16 voices, and was last updated by  reboot 1 week, 1 day ago.

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  • #44222

    Rwc13
    Participant

    Hi

    We live in Portugal and have just purchased a 10k kms 2014 Zoe to use as a local runaround. The car came with the type2 to type 2 cable and the Renault supplied 2 pin wall socket to type2 cable.

    Our house here as a 3 phase mains supply with 30amps per phase. I have been charging the car for the last few days from the 2 pin wall socket in the garage.

    However, I have now read that a normal wall socket should be used just for “emergencies” and that I should install a proper EV wall charger. Does this apply in my case with a 3 phase 30amps per phase mains supply?

    I know very little about electrical systems beyond how to replace a plug.

    Thanks in advance for your advice.

    #44227

    Trevor Larkum
    Keymaster

    You should be able to install a charge point fine – either a standard one that just sits on one of the 3 phases and charges at 7kW or, for more money, one that uses all 3 phases at 22kW.

    #44232

    Rwc13
    Participant

    Thanks for this Trevor. I spoke to an electrician here today who confirmed all you have said, although the 3 phase is at the other end of the house so will mean running the cable quite some distance to where the car will be charged. So, since we will only use the car for daily local journeys, I think we will be more than happy to charge overnight at 7kw with a standard charger.

    However, I also asked about the “dangers” of charging overnight with the Renault 2 pin to type 2 cable. He couldn’t see any dangers at all, and indicated the only downside was slower charging if we are using a significant amount of the supply capacity elsewhere in our home. At night, when we charge the Zoe, there is almost zero other capacity usage so this really should not be an issue.

    I asked specifically about the risk of overheating and he said the circuit protection here should prevent that.

    If this is correct, then I would probably just charge this way for the time being. As I said, we will only charge at night and probably only every 2 or 3 days based on current usage. Do you see any flaw with this?

    Robert

    #44233

    mikep
    Participant

    Just a bit of nit picking for Rwc13, 10k kms? k is kilo meaning thousand, this gives you 10 thousand thousand metres. In the metric system km is a symbol, there is no plural. I think what you mean is 10 000 km.
    On the 2 pin charging, surely you mean 3 pin, live, neutral and earth? If you have no earth I’m not sure the car would charge.
    I ran a 3 phase 16 mm2 cable down to my garage, 60 m from the house and put in a 3 phase 22 kW charger that turns on automatically when EDF changes to the cheap night rate.

    #44235

    Rwc13
    Participant

    Not sure how any of that is helpful, but guess it wasn’t intended to be…..

    The question was, if I am happy to charge slowly overnight, is there any real danger in using the supplied mains plug to type 2 charging cable supplied by Renault with the car on a regular basis? We typically do no more than 30 kms in a day, so charge to full in 3-5 hours every other night. Are the suggested “dangers” of charging from the mains socket real or just a ploy beyond faster charging to market the sale of wall boxes (as my electrician here seemed to indicate).

    I also read in a scientific report that faster charging degrades the batteries faster……..of course that too may be hokum.

    #44236

    mikep
    Participant

    Robert, I’m still not sure what you mean by 2 pin charging? I’m sure slow charging is fine, I occasionally use the 220 V cable when I want to charge during the peak rate period as my 400 V wallbox only works during reduced rate periods. You will find that the range becomes more accurate when the battery is less than 50%, I reset the trip meter every charge and use that initially. In summer I usually get 160-180 km on a 100% battery, probably 120-130 km in winter running the heat. I only recharge when necessary. You can always use a public charge station, most are 22 kW chargers.

    #44238

    Trevor Larkum
    Keymaster

    @rwc13 I think concerns about charging with the ‘occasional’ cable are valid, but some people exaggerate them. The issue is that you are passing a lot of current – typically 10Amps (about the same as a kettle) – for a very long period of time. If there is any point in the circuit where there is a poor connection, e.g. where you plug in, or poor quality wiring then there is a real chance of it getting hot and – at least potentially – starting a fire. During the middle of a charge you should check the plug and socket, and the wall above them assuming that’s the route of the cable, to ensure they are no more than warm. If they have got hot – and in some places I’ve plugged in they have – then I would stop. I don’t think circuit protection would operate until after a problem has occurred, if then.

    @mikep, Rwc mentions he’s in Portugal so I assume a 2 pin cable would be standard there.

    #44261

    reboot
    Participant

    As Trevor has pointed out, how does the car see an Earth connection with only two pins? Would an RCD operate on an earth leakage basic?

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