This is what I did. Added a couple of deep cycle optima batteries. I close the AGM cells due to
lead acid cells off gassing stuff I don't want in my house. They have worked well, so I added another
set if H6 yellow top optima to my other UPS to power my PC, TV and other media stuff.
Good points. People may not realize that when charging a lead acid battery, it off gasses' hydrogen gas. Hindenburg anyone.