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  1. #21
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by Kudus View Post
    You messing with me😀

    Question: would it be a problem if the wires are thicker than mecessary?
    No
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  3. #22
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    Default Re: Camp fridge,105ah battery and solar?

    Slightly OT as the OP wants solar only.

    My setup has 1x100W panel and a 30A DCDC with 120Ah lithium battery.

    With the fridge at 1C the battery is still full at the end of the weekend.

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  5. #23
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by cainslie View Post
    Slightly OT as the OP wants solar only.

    My setup has 1x100W panel and a 30A DCDC with 120Ah lithium battery.

    With the fridge at 1C the battery is still full at the end of the weekend.
    dumb question here. DCDC charger is only if I use the alternator as well or can you connect a DCDC for solar as well?

  6. #24
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by Kudus View Post
    dumb question here. DCDC charger is only if I use the alternator as well or can you connect a DCDC for solar as well?
    The DCDC is designed to take a feed from the alternator and charge your 2nd battery.
    An MPPT (or cheaper PWM) is designed to take a feed from your solar panel(s) and charge your 2nd battery.

    Some manufacturers make a unit that includes both DCDC and MPPT into a single device. In my setup, I have the Victron Orion Smart DCDC and the Victron Smart Solar MPPT.

    The DCDC is wired directly to the starting battery, but it is configured to only start charging when the input voltage is > 13.8V for 2 minutes so essentially it only turns on when the engine is running.

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  7. #25
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by cainslie View Post
    The DCDC is designed to take a feed from the alternator and charge your 2nd battery.
    An MPPT (or cheaper PWM) is designed to take a feed from your solar panel(s) and charge your 2nd battery.

    Some manufacturers make a unit that includes both DCDC and MPPT into a single device. In my setup, I have the Victron Orion Smart DCDC and the Victron Smart Solar MPPT.

    The DCDC is wired directly to the starting battery, but it is configured to only start charging when the input voltage is > 13.8V for 2 minutes so essentially it only turns on when the engine is running.
    Thank you for explaining. Now I understand

  8. #26
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    Default Re: Camp fridge,105ah battery and solar?

    Next question is do I connect two solar panels in series or parallel?

  9. #27
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by Kudus View Post
    Next question is do I connect two solar panels in series or parallel?
    Either.

    If your controller can handle the higher voltage of series, you can use series.

    But, parallel is most often (not always) better because shade on one panel will still allow the other panel to charge. In series, shade on one panel will be the same as shade on both panels.

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  11. #28
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    Default Re: Camp fridge,105ah battery and solar?

    Considering that you are looking at a Victron solar regulator would it not make more sense to look at the WRND charger which combines DC to DC & an MPPT solar controller?

    https://4x4direct.co.za/dc-to-dc-cha...110661867.html

    The WRND is only a little more expensive but would give you the option to charge from alternator. Dependent on your usage the alternator can be a great way of charging the battery. In my case the morning game drive basically re-charges the battery. Back at camp I connect my 80W panel which meets the demand of 2 fridges meaning we don't dip into the battery at all.

    The afternoon game drive tops up any battery usage.

    Obviously during the night we use a bit of battery but this is replenished on the morning game drive.

  12. #29
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by Kudus View Post
    You messing with me��

    Question: would it be a problem if the wires are thicker than necessary?
    Nope I am not messing with you.

    Before the fancy MPPT's arrived, all managed with PWM's and correctly sized wires.

    Blame KFC....they started this upsize trend. TIC (It does smokkel with your head in some way)

    Also blame advances in technology...this is better than that...etc.

    Read my post in that light
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  13. #30
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by Prof View Post
    Nope I am not messing with you.

    Before the fancy MPPT's arrived, all managed with PWM's and correctly sized wires.

    Blame KFC....they started this upsize trend. TIC (It does smokkel with your head in some way)

    Also blame advances in technology...this is better than that...etc.

    Read my post in that light
    Lol. I get it. Just as I thought I made up my mind something else comes a long😅

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  15. #31
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by Half-Pint View Post
    Considering that you are looking at a Victron solar regulator would it not make more sense to look at the WRND charger which combines DC to DC & an MPPT solar controller?

    https://4x4direct.co.za/dc-to-dc-cha...110661867.html

    The WRND is only a little more expensive but would give you the option to charge from alternator. Dependent on your usage the alternator can be a great way of charging the battery. In my case the morning game drive basically re-charges the battery. Back at camp I connect my 80W panel which meets the demand of 2 fridges meaning we don't dip into the battery at all.

    The afternoon game drive tops up any battery usage.

    Obviously during the night we use a bit of battery but this is replenished on the morning game drive.
    Haven’t thought of it before but it makes sense. Where do you install it? Can I put it on the battery box?

  16. #32
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    Default Re: Camp fridge,105ah battery and solar?

    Kudus, probably more important than anything mentioned yet, ensure your panels are standing at the correct angle to the sun. I seldom see panels at the recommended 30 degrees. In my experience, standing your panels at just 10 degrees out, you will lose about 30 percent efficiency.
    My 2c worth.

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  18. #33
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    Default Re: Camp fridge,105ah battery and solar?

    Another question at what temp can fridge be st to keep meat still frozen.
    Last edited by fatbike; 2021/09/07 at 09:12 PM.

  19. #34
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by fatbike View Post
    Another question at what temp can fridge be st to keep meat still frozen.
    Duh 0 degrees or colder?
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  20. #35
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by jelo View Post
    Duh 0 degrees or colder?
    Putting that Duh is a bit uncalled for he asked a question no need to put him down if you regard question as stupid
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  22. #36
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by clivemd View Post
    Putting that Duh is a bit uncalled for he asked a question no need to put him down if you regard question as stupid
    Seriously? Asking at what temp stuff freezes?
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  23. #37
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by jelo View Post
    Seriously? Asking at what temp stuff freezes?
    He did not ask at what temp if freezes, but at what temp can you keep it frozen, if I go away I will put my frozen meet in fridge at 2 to 4 deg it will still stay frozen for 2 or 3 days depending how much frozen stuff you have in it and how obtain you open lid
    maybe that’s what he was Asking and his question was not specific enuf
    that’s the way see it
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  25. #38
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by jelo View Post
    Seriously? Asking at what temp stuff freezes?
    Read the question again. …many people have the same thoughts.

    What is the lowest recommended setting to keep goods (meat) frozen? I presume in the interests of reducing freezer power draw and thus reducing the load on the battery.
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  26. #39
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    Default Re: Camp fridge,105ah battery and solar?

    Zero degrees.
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  27. #40
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    Default Re: Camp fridge,105ah battery and solar?

    Quote Originally Posted by jelo View Post
    Zero degrees.
    I’ll take the bait.

    Zero degrees might be the temp at which the produce is frozen but is not that temp at which is should be stored…otherwise freezer settings would go no lower than 0c.

    https://www.fda.gov/consumers/consum...ng-food-safely
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