Hello!
Please add it if you have time, so people won't have problems with mods that modify reactors.
I started K2 Spaced Out today just to have a look at it, the problem was that your mod uses vanilla fission reactor, and in K2 it requires nuclear fuel to function. So the armor didn't have any power :(
The fix was adding a copy of reactor from core game into data.lua, naming it "fission-reactor-equipment-sbs" and using in scripts elsewhere. Thankfully K2 doesn't dynamically modify every existing power source so this worked for me, it's working as intended.

In version 1.0.7, I have implemented a new runtime setting that causes the mod to use an unmodified fission reactor instead the vanilla one. It is intended to be used in cases like yours where the vanilla fission reactor was modified. Hope this helps.

Thank you!