for what its worth, when I was figuring out how to power my expanding 8-channel rig, I checked the voltage ranges of my gear and noticed that they all have 12V in common.
Conveniently I already had a 10-14-88 batterygeek that seems to runs my rig for ever
Originally I considered making a proper DIN rail for power distribution contained in a little box, but to save on size and weight I instead made a breakout cable that terminates in a standard little DC plug on the power input side.
I then took a quality little 5A 12V power supply, attached a DC socket to the output, and zip-tied it to a little high quality two-socket surge suppressor/notch filter.
This way the gear stays permanently plugged into the breakout cable and I can choose between plugging everything directly into the battery or into the little power supply/surge suppressor/notch filter when I'm using house power.