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Installing EV Charging Units in Petrol Stations

Roger B
Petrol stations have various strict requirements regarding their electrical installations for obvious reasons. How will adding a MW size supply for a few high power chargers be dealt with, separation? Will earth leakage currents be a problem? If I remember correctly the reason the canopys are so high is to move the lighting into a different zone.
  • Former Community Member
    0 Former Community Member
    In a conversation this evening with an ex DNO guy who's now HV freelance, the subject of EV came up and it would appear that the UK is following the Dutch way of the DNO providing a 3-phase cut-out to all new build (WPD are now implementing this where there is 3-wire 11 kV). The idea being is that one of the phases is for the standard domestic CU and if an EV charge point is required, it uses one or possibly two of the remaining phases and dedicated "CU" or "switch-fuse" with a bi-directional meter so that the vehicle battery can be used for peak lopping.


    It still doesn't resolve the problem of base load increasing faster than generating capacity though.......


    Regards


    BOD
  • 0
    My next car could be a M-B EQS (I wish). Although less powerful than the current top of the range, it will do 400 miles on a charge (more than my petrol motor car) and accelerate faster. Top speed is irrelevant in UK. The charging points will accept 3-phases, i.e 96 A or "100 mph" charging. So most days that would take no more than 20 minutes. Or charge weekly for an hour or two.


    I cannot see why any new supply would be single phase. The extra cost of three phases is very little, except that there would need to be a TPN DB and a lot of domestic installers are probably afraid of three phase.
  • Former Community Member
    0 Former Community Member
     it will do 400 miles on a charge (more than my petrol motor car) and accelerate faster. Top speed is irrelevant in UK.


    I ought to try and work out for every 0 to 60 in 5 seconds, by how many miles does that burst reduce the nominal range.......


    I've always been an acceleration addict (well apart from my first car, a 746 cc DAF, well it was the early 70's) and have been in several T**** cars and whilst I concede the acceleration is quicker than my present car, I found it, well, soulless and not at all engaging. Give me overdrive on 2nd, 3rd and 4th!


    Regards


    BAD
  • 0
    perspicacious:

    Give me overdrive on 2nd, 3rd and 4th!


    Regards


    BAD


    That would be a Triumph ?


  • 0
    perspicacious:

    I ought to try and work out for every 0 to 60 in 5 seconds, by how many miles does that burst reduce the nominal range.......


    Tesla Model S "Plaid" does 0 - 60 in 2 sec with 1000 bhp peak. So that is 750 kW for 2/3600 of an hour = 0.42 kWh. Ordinary Model S takes 3 sec with 670 bhp peak = 0.56 kWh.


    Range is about 400 miles with a 100 kWh battery so that is 0.25 kWh per mile.


    If the acceleration is linear, the average speed during the acceleration phase is 30 mph. In 2 sec that gets you 30 yards down the road, so I think that we can ignore that.


    So the answer is that each burst of 0 - 60 flat out loses a range of about 2 miles.


    I think that such fierce acceleration on the road would be as unpleasant as it would be dangerous.


  • 0
    I wonder about the future of Electric cars. Petrol and Diesel are on the decline. I have decided not to install a battery charger at the house or buy an electric car but wait a few more years. I think an alternative may be Hydrogen but that's too dangerous but what?. It's all about economics, there is no incentive to ditch electric cars at the present.

    Jaymack
  • Former Community Member
    0 Former Community Member
    That would be a Triumph


    Spot on Roger!


    A 1971 TR6 from 1976 to date


    Regards


    BOD
  • 0
    30000000 vehicles divided by 8000 filling stations = 3750 vehicles per filling station.


    Assume each vehicle is filled once a week and garages open 6.00am to 10.30 pm like our local supermarket filling station, that’s around about 37 vehicles  per hour visiting each of the garages.


    So does each garage need replacing with around 40 fast chargers or more?
  • Former Community Member
    0 Former Community Member
    Sparkingchip:

    30000000 vehicles divided by 8000 filling stations = 3750 vehicles per filling station.


    Assume each vehicle is filled once a week and garages open 6.00am to 10.30 pm like our local supermarket filling station, that’s around about 37 vehicles  per hour visiting each of the garages.


    So does each garage need replacing with around 40 fast chargers or more?


    It depends on what fraction of total EV charging happens in such locations. At the moment EV ownership is heavily biased towards people who are able to charge at home (have driveways, etc.), and such people might only use a public charge point a few times a year. I also expect fewer petrol-station-like "places you go to charge your car" and more slow charging in places you are already going (supermarkets, public car parks, etc). Motorway service stations will need significant numbers of high power chargers (and a new substation), but no-one who has a home charger stops at a rapid charger on their way home from work (as you might do to get petrol) unless they actually need to do so to get back.


    I'm not sure if anyone is currently collecting statistics on where most charging currently happens.


  • 0
    Isn’t OLEV collecting data from home EV chargers?

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