You were correct, the battery failed the test. It needs to be replaced. It’s a continental Marine/RV deep cycle battery. It charges up, it tests only half its cranking amps, and the internal resistance is high. It’s a sealed battery, I’m checking to see if it’s still under warranty. But I may take this opportunity to upgrade and follow advice in this thread.AnOldUR said:Sounds more like either your onboard battery is insufficient (low amp hour lead acid) or it's no longer working properly. A fully charged 100Ah LiFePO4 should easily get you through a night or two. The Alde on gas doesn't use a lot of electric. Of course this is assuming you're running a 12V compressor fridge, not a 3-way on 12V electric.TourDeForth said:... So now I’m shopping for a portable battery for the trailer ...
I would consider a battery upgrade before the purchase of a power station.
I wanted a 12v DC power source to use outside under my awning next to the table. So, I made one, it involved a little drilling and some wiring. Now I can power my Ham Radio or any 12v accessories while sitting outside. Right now it’s powered by a 20Ah power station under the door side couch. I also put a port on the inside as well as a switch to turn off the outside ports. (It’s got a red led to remind me that I have it on.) I use lithium batteries and can plug a solar panel into the outside port to recharge it. But eventually when I switch my Tab over to lithium I’ll tie it all into my trailer DC power bus. I can patch it at anytime to the Trailer DC bus to either share the charge of my batteries or run the DC setup while I’m on shore power. I’ll share a couple pictures.its a Powerpole and 12v car accessories port.
its controlled by a lighted switch just inside the door.