I'll keep that in mind. This is a TINY camper (Truck camper) which I think he and his wife are going to out grow in the near term. I think that he'll end up with a couple of GC2's and he's got a samulex? PSW inverter (which we're going to wire in today.
he doesn't have a 3 stage battery charger and I'm going to check the voltage on his jar this morning (he's only got a battery tender - 2 amps at best) and that voltage/amps, sometime in the spring of 2019 it'll be fully charged!
The thing about batteries is longevity. If you care for them, they will last you - but if they are not cared for, they will fail, quickly.
I'm looking online this morning to find the Fleaby site that sold me my SMD panels of LED's with bayonet bases. he's running incandescant 1141 bulbs.
Baby steps. If I can get him water, electricity a couple of extra cabinets and a reversible vent fan he'll be cooking!
Thanks again!