Reuse Old(er) UPS w/Solar+Battery?
1st: Very new to the whole solar arena. Been researching it for a while and would like to start with something small (few outlets) to test and get some good feelings that this works/etc/etc
I have some older UPS (APC) that have batteries that are almost shot. I was thinking instead of throwing these away that I might be able to use a solar panel to provide the ~12v to *trick* the UPS into thinking the battery was fully charged. I know there are tons of issues with this (Would love to know them)
Big (electrical?) question I have is how can I charge a battery and be using it at the same time? I know that we need a diode to prevent anything from backfeeding but how do I get the solar panel (cut down to a clean 12v) to charge the battery which in turn is connected to the APC/UPS unit (unplugged) with a few devices on it.
My first guess was to put a solar controller/charger in there to feed the battery.... thoughts??
Big goal is to have different sources charging the batteries like solar/wind/pedal but I haven't found anything that really describes how to do this.