Originally Posted by SilverGhost
Hmm, mine runs about 3 days on a fully charged group 24. I'd guess if I upgrade to group 27 or go to 6V Trojans that could be substantially longer. A <$100 solar panel
keeps enough charge to run indefinitely.
For me the additional cost is propane - I don't have it. I would need the tank(s), brackets, covers, regulators, hoses, pipes, safety valves, etc. to be installed. I admit it's on the wish list, but not in the budget.
And how many days can you run a 3 way fridge on propane? A week? Month? I assume it depends on size of fridge and how often you open it.
I think you would be surprised as to just how many days you can run a fridge on a single 20lb propane tank.
In my experience running the fridge around the clock on propane its surprisingly efficient. I can't say for sure as to how long it might go only running the fridge around the clock as I have never simple run just the fridge on propane.
I also use propane to run the hot water tank daily, as will as the stove top a couple of times a day and occasion oven use (perhaps once every 6 days out), in addition to the furnace
as needed. I have camped out for 45 days straight with about 70% of those days off the grid (even when on the grid I am still using propane for everything but the fridge) without needing to refill a 20lb tank - even then the tank was not completely empty.
As many people already have other appliances they use daily on propane they will already have the tanks so no added purchase cost there. So the only added operating cost is the propane being consumed by the fridge which I suspect based on my experience is a relatively small volume for most of the small fridges many of our trailers have.
In my experience camping with friends who have newer 12V only fridges they can get by for max of a couple of days assuming they are needing to use their lights
and water pump and furnace
etc before they need to set out a 100 watt or greater panel assuming there is sunshine. If no sunshine then they need to pull out the generator
.... in these parts due to more often than not heavy tree coverage make the solar less than optima, the later happens frequently as it does in late fall
or early spring camping when there is a shortage of sunshine ... all of which has a cost associated with it.
I also have solar BTW ;-) was simple pointing out that when doing price comparisons for various fridge power type chooses one needs to add up all the costs associated with each choose/system.