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Thread: Solar/fridge query

  1. #1

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    Solar/fridge query



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    We are finally getting our solar done.
    I was given two options of 100 w and 150 w obviously difference in price. our fridge runs off our battery so if I was going to go 150 watt as I feel it's way more than what we need anyway.
    My question is would I be able to leave my fridge running all the time even when parked up ?
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  2. #2

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    That’s a big question as there are lots of variables anyway such as size of fridge but mainly what season and where you are parked let alone the sum involved even if the solar was large enough. I mean electrical calculations and not money
    Last edited by silverweed; 26-09-2018 at 10:52.
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    Min id say would be 200w of panels and two 110 ah battery bank which should hold over night,but even at that you are on the fringe,double the above would be a better bet.
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  4. #4

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    It doesn't matter how many ways this solar thing has been explained to me I can't seem to get my head around it, it all seems so technical 😂
    I just thought as I would have power that I could leave things running/charging in between trips but of course your right lots depends on light/weather etc and the tree we park by won't help it's cause either.
    I suppose it will all become clearer once it's fitted and installed.?
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    Once a fridge is cold

    It does not use much power to remain cold.
    Assuming no opening and closing too much or worse adding warm items.

    Maybe go for at least a 150W Panel maybe 200W the cost of the panel is worth it..solar is quite cheap these days

    Fridge will get a bit warm in the morning (breakfast) but I suggest even if only moderately sunny you battery (ies) will be fully charged again by midday.
    Little drain until you start opening the fridge again teatime/ evening meal...But is is either cooler then OR if it is hotter your solar will "do its job

    I monitor my LB with a simple Voltmeter.
    I appreciate this is NOT as good as a "charge meter" but it works for us
    Adding a second LB is also good and will make use of a more powerful panel.

    Get some details about the power your fridge uses (preferably how many AMPS it draws on 12V supply
    A) When cooling and how long it might take to reach operating temp
    B) when just ticking over
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    If you can afford the 150w then get that
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  7. #7

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    My 200w roof panels only put back a few amps in mid winter at mid day.
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  8. #8

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    Hi Jac,

    I don't have personal experience of that kind of fridge, but i have done a bit of reading,

    When in the van, it seems to be best to turn off the fridge overnight. It will keep cool cos it's not being opened.

    Don't think it will work well in winter on your drive and with your solar obscured by trees.
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  9. #9

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    What consumption dose your fridge use ,some members run compressor fridges 24 7 but have 400w solar .

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    I have a 175w panel with 2 Trojan T125 batts and I can leave my Waeco comp fridge running full time.
    My advice would be to get the most solar you can fit on your roof.
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