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400kW charger - how many of these on a typical local network ?

Discussion in 'Electrics UK' started by SimonH2, 16 Dec 2018.

  1. reds42

    reds42

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    The calculation is on how much extra generation is needed to replace diesel with electric to run cars, not on how that extra generation is created.
     
  2. Harry Bloomfield

    Harry Bloomfield

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    Why do you think the differential between daytime rates and E7 has been gradually eroded away over recent years? Its because there is no longer the mass surplus of supply that there once was, so probably less surplus than you imagine.
     
  3. JohnD

    JohnD

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    i don't need to imagine.
     
  4. JohnD

    JohnD

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    ha ha!

    It's almost as if I already knew that!
     
  5. reds42

    reds42

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    The government should forget HS2 and spend the money upgrading the grid for the inevitable increase in demand, and incentivise more the adoption of relativley cheap renewable supply such as solar on peoples houses.

    I should add I am not a raving eco warrior, but can see the future of transport will inevitably become much more electric based. Recent electric cars ranges would easily cover my usage paterns, and I would seriously consider buying one in the next few years.
     
  6. Harry Bloomfield

    Harry Bloomfield

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    The surplus you mention, includes all possible capacity, a lot of which is expensive capacity they want to avoid using except if they have to - the result is the expensive E7 rates. Idea is to deter E7 customers, ask JohnW2. If lots of people buy EV's, then the E7 rate will increase, possibly to more than the daytime rates. Nights are when surplus power is used to recharge storage systems, to cope with the peak demands.

    Ideal for generation is all of the big generation stations running flat out 24/7, plus all solar and wind generation being consumed.
     
  7. JohnD

    JohnD

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    And yet there is still a dip in demand, so slack capacity exists

    Not ideal to have no reserves
     
  8. Harry Bloomfield

    Harry Bloomfield

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    Wind only generates, when there is wind, solar only generates when there is solar. Between times, they have to have conventional capacity. The rub is that conventional capacity costs a lot of money to have as back up for when solar and wind fail to provide. Some of the conventional needs days to get up to speed so it can generate useful power, so it has to be kept ticking over, doing nothing much but absorb money.

    I am a raving eco warrior, but I am also an engineer who understands some of the problems involved. I use buses where I can, walk and limit car use to distances. I would love an electric car, but one would not be practical except as a replacement for walking and bus journeys.
     
    Last edited: 9 Jul 2019
  9. reds42

    reds42

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    When you have large scale numbers of cars able to feed into the grid it will smooth out some of the highs and lows.

    But I accept we need more base supply to. I'd be quite happy for new build nuclear supply to be added (admitidly others wouldnt).
     
  10. JohnW2

    JohnW2

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    The calculation you previously posted was, but the message to which I was replying merely quoted the relative fuel->wheels efficiency of electric and petrol/diesel vehicles.

    Kind Regards, John
     
  11. JohnW2

    JohnW2

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    Indeed. With my previous supplier (E.ON), the advantage of E7 reduced dramatically in April of last year (having been pretty constant for several years prior to that), and was going to reduce considerably more in April of this year had I stayed with them. However, by changing supplier (in April of this year) I have regained at least some of the 'E7 advantage' ...

    upload_2019-7-9_17-18-46.png

    Kind Regards, John
     
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  12. ban-all-sheds

    ban-all-sheds

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    And solar panels on people's houses are going to be how much use for overnight charging of EVs?

    Or, indeed, how much use for charging at any time of day between, say, the beginning of November and the end of February, coincidentally a period where people will be more inclined to use their car instead of walking/cycling/waiting for a bus?
     
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  13. JohnD

    JohnD

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    Windpower is a bigger than solar now, and still seen as a terrific moneymaker for the companies building offshore. It's half the cost of nukes. It's almost always blowing somewhere, day and night. But yes, there are periods of prolonged calm.

    I don't believe that domestic solar is a viable business proposition.

    I'm disappointed that the UK is not making progress with tidal.
     
  14. reds42

    reds42

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    Merely an example source, not to be taken as an exhaustive list.

    Ballpark 10% extra generation needed from the grid to replace petrol/diesel use in cars is entirely doable and not the orders of magnitude greater production needed suggested earlier in the thread.
     
  15. reds42

    reds42

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    The green lobby would never let tidal barriers be built for ecological reasons which is a shame.

    We have a lot of rough seas but wave power generation also seems impractical at the moment.
     
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