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EV charging provision as part of new build planning permission?

Former Community Member
Former Community Member
As per subject, I was asked this morning about the practicalities for EV provision by an electrician. Apparently, it has been stipulated as a condition of granting planning permission for some new build dwellings, so I asked for sight of this.


Whilst it is usual for the planning to seek comments from the water authority for sewage disposal, I doubt if the DNO has been consulted.


Has anyone else come across this?


Regards


BOD
  • 0
    Although, once this has happened to more than a small fraction of all houses in the street, the substation fuses and then the transformer will be next in line for improvement.
  • 0

    mapj1:

    Although, once this has happened to more than a small fraction of all houses in the street, the substation fuses and then the transformer will be next in line for improvement.




    Being more than a tad cynical - get it now whilst you can. It is certainly wise to make ample provision for one or more EVCPs per house - don't forget that two may be needed, or at least one which is rapid enough to be able to charge two vehicles in succession.

  • 0
    Yes that is OK if you are in the first few in an existing street. But for a new development it will be necessary to allow 10 kVA per property at least, and that will be very expensive, just how much are 1MVA transformers, HV lines, enclosure, etc. I would expect a 500 house development to need a few million spent, that is a lot per house which the developer will have to pay. Then they should also be charged for a few MVA of gas backup, a few more million, and a new EHV line to the town from the super-grid. A few more million. Those will be mighty expensive houses, which are soooooo-green.
  • 0
    Oh I forgot something. Then there is the air source heat pumps and their supply. Well a few more kVA per house assuming a COP of 3-4 and reasonable levels of insulation, ventilation heat exchangers, fans and all the other bits, at least another 20k per house! Then there is the operating costs, which will probably be at least 20p/unit unless the rest of us subsidise them, for green electricity. Is this really the green revolution, I think not because no one will be able to afford it.
  • Former Community Member
    0 Former Community Member
    Although it could be argued that a large estate with many EV's charging is also a very effective energy storage device


    It's probably not beyond the wit of man to set up a local wi-fi node that could be modulating (or even suspending) charge rate at times of peak consumption  - and a lot of fully or partly charged cars is also a pretty good tool for smoothing the local grid if all those Heat pumps are cracking away on a cold night


    Obvs as new builds they will have exemplary values of thermal insulation and airtightness so moving the energy from gas to a green(er) grid probably isn't as dramatic as might be first perceived.


    All do-able - but it does need a joined up approach to infrastructure planning over long timeframes.


    Of course, Coronavirus might just dip us into a dystopian world where the lucky few will be surviving on small gen sets looted from the tool hire companies and we'll be burning stacks of anything carbon based


    Regards


    OMS
  • 0
    From the WPD design document:
    https://www.westernpower.co.uk/downloads/3370


    3.0 LOAD ESTIMATES

    3.1 The after diversity maximum demand (ADMD) and the annual kWh consumption of each property can estimated using Table 1 and Table 2 respectively. The ADMD of a property is the maximum demand that is assumed at the time of highest demand on the substation or LV circuit.


    So for a three bedroom house with a heat pump and EV charging:


    Table 2

    Estimated After Diversity Maximum Demand  Values (kW) for Domestic Properties


    1.3+D+E


    D = 1.0 x total kW rating of the electric heating and electric water heating load. For existing connections add together the unrestricted and restricted units together.

    E = 0.5 x total kW rating of any electric vehicle charging points


    So what are the anticipated heating and EV charger loads for a three bedroom house?


    Andy Betteridge 



  • Former Community Member
    0 Former Community Member

    Sparkingchip:

    So what are the anticipated heating and EV charger loads for a three bedroom house?

     




     

    Well, as a first approximation, you could assume 3.6kW for the EVC and (assuming storage of Hot water not instantaneous) a heat pump rating of circa 12kW - allowing for a fairly low COP,  then about 4-5kW


    Regards


    OMS
  • 0
    So a standard 80-amp supply and it’s up the consumer to make it work?


    Andy Betteridge
  • 0
    How many people could afford the daily £60 to £70 electric bill that can be run up with a 80-amp rated electric supply?


    Andy Betteridge
  • Former Community Member
    0 Former Community Member
    How do you figure that out


    The car isn't constantly charging and will be cheaper than buying fuel


    The heat pump isn't constantly heating a house against minus 5C - I appreciate it's usually crap, but we do actually have a summer in the UK


    I'd imagine in a new build 3 bed, the house fuel and car fuel cists would be less than £2.5k/annum - so about £7 /day


    Regards


    OMS

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