Follow up but not exactly genny related.....
All this talk about battery life and warnings about discharging too far etc...
mostly true but don't forget one of the most important aspects of
keeping your battery(ies) healthy and long lived..... all that time you
aren't using them! All that down time in storage. You need a battery
disconnect switch so your battery isn't being discharged by the sneaky
loads found in every trailer even when you think stuff is all off.
AND GET AND USE A BATTERY TENDER. Keeping your battery 100%
fully charged all the time it's just sitting there "doing nothing" is a biggie.
I got 6 seasons out of my last pair of plain old "marine/crank/deep cycle"
12 volt batteries using a battery tender Jr all the time it's parked.