dpgllg wrote:
Now since the battery is only used to supply 12 volt power to my 5th wheel the cranking capacity really doesn't mean anything to me right?
I should really be concerned with the reserve capacity if my thought process is correct.
If you don't boondock and only occasionally use the inverter, just buy the largest, CHEAPEST, regular, automotive starting battery that will fit in your battery box. You will pay a LOT of money for the convenience of an AGM.
Worst case, you may have to start the tow vehicle engine and hook the inverter up directly to its battery to run the inverter for that morning "cup of Joe".
Just make sure your converter is properly charging your battery when you get plugged in.