The GC2 6VDC GOLF CART GP24 Battery when connected in series gives you a good 225AHs of battery capacity for a good cost. This is essentially a 12VDC BATTERY after two are connected in series. The GC2 GOLF CART BATTERIES have larger cores inside and will produce a good long source of 12VDC for the cost involved.
Your trailer requires 12VDC so this means if you buy the 6VDC GOLF CART batteries you have to connect two of them in series to come up with the required 12VDC battery source.
To gain more AH capacity using the 12VDC battery then you must connect additional 12VDC batteries and connect them all in Parallel to maintain the required 12VDC the trailer wants to see...
When I got my OFF-ROAD POPUP Trailer setup in 2008 I started out with 4EA GP24 12VDC Interstate 85AH batteries mounted in parallel giving me a total 340AHs of battery capacity. This only lasted about three months as my single voltage on-board converter/charger unit boiled out the battery fluids of one of the batteries which shorted out the cores which I did not catch quick enough so I just pulled it from the setup. I changed out my old converter/charger unit to a PD9260C smart mode unit and have been running my 255AH battery capacity setup now since 2009. My GP24 Interstate batteries are just now starting to fall off on performance i.e. not holding the charge like they used to.
LOTS OF INFO on-here about this subject - do some searching and reading...
Roy Ken
