looking at options for winch power.
my international was a heavy gage plug to chassis batteries which worked great, but only as a pair.
I use my equipment trailer mostly behind the RAM but occasionally behind a hotrod.
not sure i want to dedicate a good battery to my trailer but i guess that's the way it needs to be if using multiple tow pigs.
I know Mikes goose has some solar contraption to charge an onboard battery, but really hasn't ever worked for me more than a 10 second winch pull. Looks like amazon has auto disconnect charge kits so that truck charges trailer battery, but disconnection when draw is over X amps or X volts- i guess that would work when using RV 7 way plug +12 to charge a trailer battery.
in the end i am thinking run hard cable for the ram under hood from chassis dual batteries with a HD connector to trailer at rear, then have a HD connector to leads so i can grab an extra battery if needed when running with a hot rod, or inevitably when friend borrows trailer.