Hi
If it's in "storage" in your driveway, get a trickle charger and use that. A Battery Tender is one brand, there are many others. They are cheap and reliable. If you are packing up the trailer to head out on the road, leave it plugged in for at least a day (or two) if you can.
You don't list a specific trailer (yet) so it's hard to guess if you have a "solar connector" on your battery already. If you do, the trickle charger can wire in to that. If not, a similar connector is cheap and easy to install.
Bob
|