Today I charged my car using spare solar power with a Zappi charger

Discussion in 'Hybrid, PHEV & EV Electric Cars Forum' started by Stuart Wright, Sep 23, 2017.

  1. Stuart Wright

    Stuart Wright
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    Yes, we had a Zappi charger installed yesterday which can charge either
    • like a normal charger (up to 7kw), or
    • using as much solar power as it can to supplement charging, or
    • using just solar power.
    So the car is left plugged in all day and if it's sunny enough to generate 1.4 kilowatts more than we are using in the house, the car charges.
    Note that the minimum power the car can take when charging is set at 1.3 to 1.4 kilowatts by the charging standard. So we have to be generating 1.4kw (the minimum the car will take) + 1.3kw (the average we use when the house is 'ticking over') = about 2.8kw and then the car will start charging.
    As soon as someone puts the kettle on, of course, the house takes it all and the system (house + car) will either draw more power from the grid as needed or pause car charging until there is enough power.
    It's tremendously clever.

    still.jpg

    Video coming soon.
    zappi | myenergi
     
  2. IronGiant

    IronGiant
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    I'm impressed. Not sure it would work here as we never have more than 1kW spare solar, but it looks like the way to go if you have a big array. Have you replaced your existing point or is that an additional one?

    Do you have your EV now then?
     
  3. Alan CD

    Alan CD
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    At a guess it would require an 18 solar panel array to generate 3.8kW.

    ...Something like that - quite big and would need a lot of roof space.
     
  4. Speed

    Speed
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    18 panels? Seems a bit much for 3.8kW. Don't get me wrong I know very little about the technical ins and outs of Solar PV but in Roberts Tesla Powerwall 2 video he has a 16 panel 5.5kW PV setup. Which replaced his existing 14 panel 2.2kW PV setup installed back in 2011. So I'm thinking things have moved on quite considerably and the roof space to generate X kW has gone down.
     
  5. outoftheknow

    outoftheknow
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    The panels used to be 250W (edit - and around 180W before that) and now you can get 330W. Then the size of the array is not necessarily the power you get from it. At peak power you will get close to the rated power but it is a ramped build up and then fade off over the day.

    You will get 3.8 kW twice on a perfect sunny day - once on the way up and once on the way down :)

    You still need a lot of roof for 13-16 panels.
     
  6. IronGiant

    IronGiant
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    I don't think Stuart is short on roof space. Ours is a 2.2kW array. I think or hope the set up only switches to the car at 1.4kW out of choice and that it can be set at at any level you desire? Is that correct @Stuart Wright ? I would like to be able to set it so that it switched to charging whenever any excess solar was available (while accepting that some of it will be coming from the grid).
     
  7. Stuart Wright

    Stuart Wright
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    We don't have a big array - just a bog standard 16 panel 4kw system.
    Added a second charge point in the hope we will need both at some point. Well, we will, won't we.
    Yes, our car arrived on the 15th.
    Ioniq EV delivered - nearly ran out of battery...
     
  8. IronGiant

    IronGiant
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    4kW is big for some people :D
     
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  9. Stuart Wright

    Stuart Wright
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    Fair enough, but since beyond 4kW the FIT drops, that's the standard size.
     

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