Throw out he APC battery backups, DC power controller/charger, get rid of it all!!
Simply hook up your Netonix WISP Switch, plug it into 110VAC power outlet, wire as many 12V AGM/GEL batteries to it as you want, hook up your radio units, and your set!!
Power goes out, automatically switches to battery power. You can login and check battery voltages, current draw, etc., and possibly shut things down as the voltages gets low.
PERFECT ADDITIONAL FEATURE:
Ability to enter in VAH capacity of your batteries, and since the switch ALREADY knows how much current draw your radios are pulling, it can then calculate "approximate" runtime remaining on your batteries before it shuts down!! Just like the Xantrex power monitors, where you enter in the capacity of your batteries, and it syncs everything up once they are fully charged, so when battery power is on, it can show you from 0-100% capacity remaining. Hell even just having a % of battery remaining would be good enough, if the "time remaining" feature is too much to do.
![Hurray :hurray:](./images/smilies/hurray.gif)