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Thread: How do you know what is a good solar panel.

  1. #31
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    13,157
    If that 3way fridge is the same as all the other 3way fridges out there, good luck with 100AH's..
    Well that is why I am rewiring it from the starting battery to the second battery with relay to turn off when ign fully off.

    On most/many caravans the 12 volt fridge is directly run from the car via the power wire in the 7 pin plug with no ignition relay.

    The wiring is light duty and meanders around the caravan walls so will have a big voltage drop.

    I am about to run an 8 gauge wire from the 8 gauge wire that runs to DC/DC charger .

    The current will be quite high at about 20plus 11 amps draw , so I have upgraded the relay to a 70 amp one.

    I am also including a new wire from the lithium battery in the caravan to run 3 computer fans(total 0.75 amp ) to be temporarily mounted in the exhaust duct of the fridge in hot weather.

    I will just have to remember to switch the fridge to gas when we stop for lunch etc.

    I don't think anyone would try to run a 3 way fridge on 12 volts from a battery for any length of time.
    Regards PhilipA

  2. #32
    Join Date
    May 2017
    Location
    N/A
    Posts
    1,738
    Just saying ... a mate used to import cheap rooftop solar panels from China and up to a quarter were faulty - it nearly sent him and his partners broke.
    Arapiles
    2014 D4 HSE

  3. #33
    Join Date
    Jan 2017
    Location
    Geraldton WA
    Posts
    6,795
    Quote Originally Posted by PhilipA View Post
    Well that is why I am rewiring it from the starting battery to the second battery with relay to turn off when ign fully off.

    On most/many caravans the 12 volt fridge is directly run from the car via the power wire in the 7 pin plug with no ignition relay.

    The wiring is light duty and meanders around the caravan walls so will have a big voltage drop.

    I am about to run an 8 gauge wire from the 8 gauge wire that runs to DC/DC charger .

    The current will be quite high at about 20plus 11 amps draw , so I have upgraded the relay to a 70 amp one.

    I am also including a new wire from the lithium battery in the caravan to run 3 computer fans(total 0.75 amp ) to be temporarily mounted in the exhaust duct of the fridge in hot weather.

    I will just have to remember to switch the fridge to gas when we stop for lunch etc.

    I don't think anyone would try to run a 3 way fridge on 12 volts from a battery for any length of time.
    Regards PhilipA
    99.99% of 3 way fridges are pretty pathetic when running on 12v and the 12v is only useful during transit.
    I have found that having the freezer section filled with containers of ice blocks of our Dometic 3 way fridge vastly improoves it performance when we have to run it on 12v when travelling.
    The gas and 240v options work very well so we either fire up the gas or plug the van in when we pull up.

    Try out the ice blocks option before you start ripping the van apart upgrading the 12v setup, I think that you will be suitably impressed
    You only get one shot at life, Aim well

    2004 D2 "S" V8 auto, with a few Mods
    2007 79 Series Landcruiser V8 Ute, With a few Mods.
    4.6m Quintrex boat
    20' Jayco Expanda caravan

  4. #34
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    13,157
    Try out the ice blocks option before you start ripping the van apart upgrading the 12v setup, I think that you will be suitably impressed
    Yes thanks for that. My wife loves her ice cubes and we already found in winter it will sort of keep the ice in the freezer. We will probably use some freezer bricks. We also have an old Engel 40 litre in the back of the car
    After all the element at 12volts is only 11 amps or maybe 140watts when the 240 volt heater is something like 600watts.
    However my wiring mod is pretty simple as I will run the 8guage under the floor from the A frame to the floor at the fridge inside 20MM underground conduit to protect it, as well as including a two core light wire for the planned fans.
    I was able to set up the wire in the conduit today with only minimal loss of blood.
    Regards PhilipA

  5. #35
    Join Date
    Jan 2012
    Location
    sydney
    Posts
    163
    This is always an option to help take the load off:

    Dry Ice | BOC Gas

  6. #36
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    13,157
    This is always an option to help take the load off:
    I tried dry ice wrapped in many layers of paper many years ago in a cooler on Fraser Island.

    Ended up with frozen veges and spritzig tomatoes which is interesting to say the least.
    It did last several days though.LOL
    Regards PhilipA

  7. #37
    Join Date
    Jan 2010
    Location
    Brisbane
    Posts
    2,435
    Quote Originally Posted by PhilipA View Post
    I tried dry ice wrapped in many layers of paper many years ago in a cooler on Fraser Island.

    Ended up with frozen veges and spritzig tomatoes which is interesting to say the least.
    It did last several days though.LOL
    Regards PhilipA
    Quote Originally Posted by spie View Post
    This is always an option to help take the load off:

    Dry Ice | BOC Gas
    I know a keen fisherman and he won't use dry ice as he reckons he can taste it in the fish from being kept in the esky.
    2005 D3 TDV6 Present
    1999 D2 TD5 Gone

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