For battery backup I went with the Konnected battery, eventually getting three (one for router, one for modem, one for the Konnected Alarm Panel Pro itself). They are in different locations. I’m not doing PoE, this way I get full 2.5 amp power at the board.
I purchased Mike’s MBMount 2x Pro enclosure in case I expand my system to a second board (I’m maxed out after moving all the wired sensors from the old defunct system I replaced). For now the battery hangs in the unused space. I mounted the enclosure sideways (vertical) to fit better where it is located, and this way the Battery hangs on a nail properly in the upright position.
The attached photo is before wiring, so I could visualize the layout. I added a 12-slot HO Train bus for each 4-wire zone to attach red and black, which is neater than running all those individual zone power wires to the AUX screws on the Konnected Pro board. The HO board’s wires go to AUX and 12v+. (Also I have a relay going into the space above the battery).