You should know better about asking for the rules before kickoff...
So multiples may or may not be allowed. Beta teams aren't on the GDC,

we're just trying to break things.
Personally, my team won't get additional PCM/VRM to test until December at the earliest, but we will test them when we are able.
We're doing our power extreme tests now, but haven't put max loads on the VRM/PCM yet.
No published power draw specs on the VRM/PCM components yet, but the math looks good and there doesn't appear to be any great risk of being constrained by the 20a PDP fuse, even if some strange game rule wiring scheme allows split wiring.
- 240w: a 20a PDP circuit at 12v will supply 240w.
- 45w: A VRM at max output will draw maybe 45w (12v*2a+12v*.5a+5v*2a+5v*.5a)
- 135w: A PCM at regular output will draw maybe 135w. Assumes an old Thomas compressor ~126w, plus (8) 1w per single solenoid coil or (4) 1w per double solenoid. Compressor startup draws up to 300w momentary, but handling that predictable one time surge is designed into the circuit. Longer compressor stalls are probably treated like short circuits and cut off - we'll test to see what happens in that case that later on.
- 5w to 9w: Additional PCMs will draw maybe 9w (single solenoids) or 5w (double solenoids) since multiple compressors aren't necessary.
- Both VRM/PCM have short circuit protection, so higher draws are prevented.
So,
240w = (45w+135w)baseline + a second VRM (45w) + a second PCM (9w) leaving breathing room.
I would recommend that 16 gauge wire be used if you start doubling up components for any non-FRC usage.