Right now I’ve got them on my Battery Minder, but in the next day or two I’ll run a little new wire and connect them to the newer charge controller. My 12 volt LEDs pull almost nothing measurable from the batteries over the course of an evening so there’s no practical reason to do any of this except I can’t bear to leave two perfectly good batteries out to be ruined from neglect. Giving them something to do gives me excuse to wire them to a controller.
Also, with this admittedly meaningless action I have officially achieved redundancy in every major part of my power system: I have two each of solar panels arrays, charge controllers, battery banks and inverters. Short of a catastrophic fire that just destroys everything – and let’s plan on giving that a miss, shall we? – no one disaster can take down my power system for very long. Like the lightning strike of two years ago did.