Bring in mains power supply either on left or right side at rear. Connect either battery A or B or Both also at rear. There are 26 Outputs to use/control, 13 on the left & 13 on the right at rear. 4 spare outputs not connected. Could probably be used for lighting control later.

Will consider making a priority switch variant of this.

All wiring has been connected internal as per switches inside. Just label and change images as you need.

I was also considering adding a column in the back corners to attach the cables to via wall mount outlets, but that could be done later if required. I prefer to come straight off the back walls outlets.