Do solar panels burn thru batteries?

By the way, your charging system has two modes, "charge" and "tend." When the charger reads that the battery is at full charge, it switches to tending mode. I don't know the frequency, but it regularly checks the battery charge and only tops-off when the battery goes below a certain level.

We still disconnect our camper per my above "disconnect" post when the camper and/or vehicle is going to sit more than a week or so.