If you want to boondock with a 12 volt fridge, you will need a significant solar
charging system to support it. That means both the fridge cost and say 150 watts or more of solar
and most likely bigger battery(s). If you just need solar for lights
,music and a bit of water pumping you can get by with maybe 50 watts of solar and your existing battery
. I think it's worth considering a propane/120 volt fridge that mounts in your trailer. You may already have propane
but if not, adding it is not a big expense. You may be able to find a good used propane
fridge in your area. If you build one into your existing trailer, be sure to take the opportunity to super insulate it as you build.