RFlores wrote:
The trailer will be used mostly on short weekend camping trips during the winter and weekly trips during the summer for now. So it will be parked in my driveway between trips and I was just looking for a way to keep the charge up in both batteries.
IF....you leave it plugged in for 12 hours or so to get the batteries charged.....or if they are already charged from the trip.....just disconnect one main lead and you should be fine. If they won't hold a charge pretty close to full with no load and just a weeks downtime then you need new batteries.
And a real "trickle charger" is NOT appropriate for unattended use. You need a smart tender type charger like the Battery Tender brand ones already mentioned.