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  • 12v fridge operation settings

    New to the forums and new to grand design trailer. this is my 3 rd trailer though.

    Picked up a new 2022 295rl with the new solar and 12 volt setup on the 19th. took it out to lake pleasant with power and water. When i did the walk with the dealer, i was told to disconnect the battery switch when i hooked up to shore power.(seemed strange to me but this is the first trailer with solar and a 12v fridge) I did a pre-cool in the street had good temps. drove out to the lake set up, turned of disconnect switch, day 2-3 the fridge was no longer cooling well. threw out all meat and dairy products. Was turning off the disconnect switch my problem?

    Reason for using the switch whit shore power, I was told the battery would over charge with shore power and solar. neither of my other trailers had a disconnect switch
    2022 Reflection 295RL - 2019 Ram 2500 bighorn 4x4
    2016 Kodiak 201QB - F150
    2014 14' Dune Sport TH 2010 F-150

  • #2
    The 12 v dc fridge should be wired directly to the battery , or at least to the self resetting breakers in the front storage, it should not be wired thru the battery disconnect. With that said do you know if there is a switch to turn on/off the solar charger?

    Brian
    Brian & Michelle
    2018 Reflection 29RS Oct.2017 build date, EMS-HW50C , Lippert Remote
    2015 Chevy 3500HD CC LB Duramax , Reese Elite 18K
    630 ah battery, Victron Multiplus 2, 800 watts solar

    Comment


    • #3
      Originally posted by Country Campers View Post
      The 12 v dc fridge should be wired directly to the battery , or at least to the self resetting breakers in the front storage, it should not be wired thru the battery disconnect. With that said do you know if there is a switch to turn on/off the solar charger?

      Brian
      didn't check for a switch for the solar , but if the disconnect is thrown does the battery charge? it has the mppt controller
      2022 Reflection 295RL - 2019 Ram 2500 bighorn 4x4
      2016 Kodiak 201QB - F150
      2014 14' Dune Sport TH 2010 F-150

      Comment


      • #4
        Originally posted by Dv602 View Post

        Reason for using the switch whit shore power, I was told the battery would over charge with shore power and solar. neither of my other trailers had a disconnect switch
        I find this to be very odd advice and IMO a bit suspect. Couple of reasons...

        First - with the disconnect off, I don't think the converter will be charging your battery - you would be relying only on solar (assuming that the solar charge controller is wired directly to batteries bypassing the disconnect). Might explain why fridge stopped cooling - possibly low battery voltage?

        Second - with the proper settings in the solar charge controller (battery type, charge current for bulk & float & equalize (if appropriate)), it should not overcharge your battery - even with the converter on. That's kinda' what the charge controller is for...

        Ken & Sandra
        2021 303RLS | 2020 F350 Lariat 6.7L 4x4 SB SRW

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        • #5
          Originally posted by KSC_Travels View Post

          I find this to be very odd advice and IMO a bit suspect. Couple of reasons...

          First - with the disconnect off, I don't think the converter will be charging your battery - you would be relying only on solar (assuming that the solar charge controller is wired directly to batteries bypassing the disconnect). Might explain why fridge stopped cooling - possibly low battery voltage?

          Second - with the proper settings in the solar charge controller (battery type, charge current for bulk & float & equalize (if appropriate)), it should not overcharge your battery - even with the converter on. That's kinda' what the charge controller is for...
          I found it strange advice as well. The guy doing my PDI hasn't received proper training with the new FW rolling off from GD (said he was waiting for his trip to GD to learn all the new changes that have come out) But i figured he still new what he was talking about. I had to tell him how the new installed rear camera worked :(
          2022 Reflection 295RL - 2019 Ram 2500 bighorn 4x4
          2016 Kodiak 201QB - F150
          2014 14' Dune Sport TH 2010 F-150

          Comment


          • #6
            Originally posted by Dv602 View Post
            When i did the walk with the dealer, i was told to disconnect the battery switch when i hooked up to shore power.
            The theories invented by some dealer personnel never cease to amaze me. There is absolutely no reason to turn off the main disconnect when connected to shore power. Amongst other things, this will prevent the converter from charging the battery.

            The "main disconnect" is something required by the RV organization RVIA. It may have been a full disconnect at one time in history to prevent discharging the battery while the RV is in storage, but more recently many electrical devices are required to bypass a disconnect switch, such as the propane detector, the landing gear, and now the 12V fridge. It no longer protects the battery from discharge because it only disconnects some of the circuits in the RV. Best to leave this switch on at all times and disconnect a battery terminal (or install a proper full disconnect switch) when storing the trailer for an extended period without shore power.

            Rob

            Cate & Rob
            (with Border Collies Molly & Angel)
            2015 Reflection 303RLS
            2022 F350 Diesel CC SB SRW Lariat
            Bayham, Ontario, Canada

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            • #7
              I've been using a 12V DC compressor refrigerator for nearly two years now. And I have solar charging capability.

              Here is how I successfully camp without shore power:
              1. 12V Disconnect switch turned "On".
              2. Solar charging turned "On".
              3. Inverter turned "On" when needed. This provides 120VAC power via the batteries.

              When camping with shore power:
              1. 12V Disconnect switch turned "On".
              2. Solar Charging turned "On".
              3. Converter turned "On".
              4. Inverter turned "Off".

              In five years, I think I've turned off the battery disconnect twice. And that was while I was working on some electrical circuits.

              Jim

              GDRV Forum Moderator
              GDRV SW USA Rally Support Coordinator

              Jim and Ginnie
              2017 Reflection 297RSTS

              Comment


              • #8
                Hi there leave the 12V always on, I have almost the same a 2021 295RL , the only issue I had is the dealer installed a 24 batterie so obviously I was able to last a maximum of 18hours while boondocking . I fixed that issue with 4 X 6v AGM batteries. Just remember the charger in the RV is intelligent if it needs to charge it will . Here is in interesting fact for you while having batterie issues on mine I did install an amp meter on the batterie and after a few days it reads almost 0 no draining and very light charge ( 0.15amp). If I use the leveling system then the slide outs the meter did peak at almost 100 amps for a very short time then went back down but this time to 15 amps charging, after a few days it went back to 0.1 amps charging.

                You need 12volts if you boondocking for the refrigerator can work with propane but also requires 12volt.

                My experience with dealers is quite interesting , DONT THRUST THEM , they have NO CLUE what they are doing at least for the one we have up here.

                Thanks and have a great day and hope you are still using your unit I had to winterize :(

                Comment


                • #9
                  Interesting thread as I just picked up our new 2022 22MLE with the 12v fridge and solar. We've only camped in it for a few nights so I have no real comments about the fridge or power usage but my big take away here is that, since this is an actual Grand Design supported forum, one of the moderators really needs to reach out to GD and have them contact this dealer immediately and correct them on this issue! They are building a legion of ****** off owners. Another rumor I have heard of FB is that there is no way to shut this fridge off but in fact the "dial" to control temperature does have an "off" setting. The confusion is that the light will come on when the door is opened even if the fridge is off. It only stays on for a few seconds but people think they can't shut it off and from there they believe it will drain the battery. This rumor also probably started with some walk through at a dealership.
                  Paul and Deb Cervone
                  2022 Imagine XLS 22MLE
                  2021 Imagine XLS 17MKE - SOLD; 2015 Reflection 337RLS - SOLD
                  2016 GMC Denali 3500 SRW

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                  • #10
                    Thanks for all the feed back. Next time out i will not touch the battery disconnect, and hope the fridge stays cold the whole trip. I was thinking it may have been the fridge. but now that i think about it i had low battery errors when lifting the FW for the hookup to the truck. and the slides were very slow to come in. So is it safe to say that the awnings, slides, and levelers all pull from the battery? even while connected to shore power?
                    2022 Reflection 295RL - 2019 Ram 2500 bighorn 4x4
                    2016 Kodiak 201QB - F150
                    2014 14' Dune Sport TH 2010 F-150

                    Comment


                    • #11
                      Originally posted by Dv602 View Post
                      Thanks for all the feed back. Next time out i will not touch the battery disconnect, and hope the fridge stays cold the whole trip. I was thinking it may have been the fridge. but now that i think about it i had low battery errors when lifting the FW for the hookup to the truck. and the slides were very slow to come in. So is it safe to say that the awnings, slides, and levelers all pull from the battery? even while connected to shore power?
                      It "may" be safe to say that. But I've seen different wiring configurations on different GDRV units over the years. On some of them, when the battery disconnect is off, the converter will not provide stand alone 12V power. Yet on others, it will.

                      Jim
                      GDRV Forum Moderator
                      GDRV SW USA Rally Support Coordinator

                      Jim and Ginnie
                      2017 Reflection 297RSTS

                      Comment


                      • #12
                        It is also safe to say if the battery was low in charge it will pull amps from the charger/converter to charge, if using the slides and levelers at the same time there will not be enough amps from the battery , charger/converter to do the job the same as when the battery is fully charged. Even though one is camping with shore power the battery still needs to be in top shape for everything to work as needed.

                        Brian
                        Brian & Michelle
                        2018 Reflection 29RS Oct.2017 build date, EMS-HW50C , Lippert Remote
                        2015 Chevy 3500HD CC LB Duramax , Reese Elite 18K
                        630 ah battery, Victron Multiplus 2, 800 watts solar

                        Comment


                        • #13
                          Dv602 , have you checked your batteries to make sure they were not damaged by being drained down so far?
                          John
                          2018 Momentum 395M
                          2018 Ram 3500 Dually
                          Every day is a Saturday, but with no lawn to mow.

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                          • #14
                            Originally posted by JBill9694 View Post
                            Dv602 , have you checked your batteries to make sure they were not damaged by being drained down so far?
                            I have not, but once i figure out the whole solar thing ill replace batts anyway
                            2022 Reflection 295RL - 2019 Ram 2500 bighorn 4x4
                            2016 Kodiak 201QB - F150
                            2014 14' Dune Sport TH 2010 F-150

                            Comment


                            • #15
                              Dv602 My guess is when you disconnected the battery it stopped charging as others have stated. Once the battery reached the voltage threshold for the fridge to turn off, it stopped cooling.
                              Joseph
                              Tow
                              Vehicle: 2018 GMC K2500 Denali Diesel
                              Coach: 303RLS Delivered March 5, 2021
                              South of Houston Texas

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