Hello, I have this question posted in another group as well but I figured I'd give you folks a shot at it.
I have two APC rackmount ups units. One is a 2200XL model which has a larger internal charger to support external battery packs. The other unit is a 2200 model that does not support external battery pack and thusly has a smaller charger. I want to disable the charger in the second unit while retaining all of the normal functionality of the UPS. I want to do this in order to have them share a large deep cycle battery pack where only the other unit will charge it.
I have taken a few photos of the main board of the ups. I am curious if anyone is familiar with it or can recognize what I can do to disable its charger. Perhaps even removing a simple fuse would do the trick, I dunno. I can do the work, just not sure how to proceed. I do not have a schematic for this.