Long story short: my gas fridge died and I have replaced it with a 12v compressor type. I am currently running an experiment to measure it's real world power use. See http://tnttt.com/viewtopic.php?p=1269247#p1269247
I might well find I need more battery. The problem is my current (pun intended) one is still good so I don't want to ditch it.
Two batteries in parallel seems a potential solution.
Possible downfalls?
Space. They could well end up at different ends of the trailer. Hmm good heavy guage wire may help but even so...
Mismatch capacity
The charge controller has no dual battery smarts so it will treat them as one. If they have different capacities will that degrade the life of one?
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