I've recently purchased the Jackery 1500 and 4-100 watt solarsaga panels to use with our travel trailer. We got this set up because we are inexperienced with solar and we wanted portability to use at home if needed. Our primary need is to power the propane refrigerator in the trailer. That fridge on propane draws 3 amps on 12 volts. We figure the fridge will be running 50% of the time. We planned to plug the trailer cord into the Jackery to keep the RV battery charged to run the refrig on 12V. I understand there is loss of power with that set up. Our 2 other thoughts were 1) would it be ok to connect the Jackery directly to the 12 volt marine battery via the Jackery Powercable 12V auto battery charging cable, cigarette plug to alligator battery clamps to keep the battery charged? or 2) plug a battery trickle charger into the Jackery AC outlet and keep the camper battery charged that way? Excuse my ignorance with all this. Thanx in advance.