On 6/29/2013 3:24 PM, veegee wrote: > * Indoor use, so flooded lead-acid is to be avoided. > Unless you have thousands to spend on batteries that is going to be your=20 only option that can do what you want. Deep cycle batteries are what=20 everyone uses to get long life and long run times. I know people fear=20 the concept that charging of the battery will produce hydrogen gas but=20 that is only true if the charger over charges the batteries. If these=20 batteries leaked hydrogen every time they charged they would be=20 worthless because it wouldn't take long for the electrolyte to dry out. =20 Get some batteries designed for solar use and you shouldn't have a=20 problem. Mark --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .