In a mars playthrough, just noticed there seems to be an issue with Atmospherics kits (particularly Air Conditioners?) forming a HUGE power deficit (to the degree of megawatts or even gigawatts). I think it may have something to do with if the atmospherics device doesn't have its demand met for too long it accrues a debt. This can be checked with a Configuration tablet showing the Power Requirement as an insanely high number.

Upon restoring power, the power debt just slowly declines, all the while pulling the max wattage available and effectively hogging the entire circuit. I couldn't figure out why none of my lights were working until I realized multiple AC units required somewhere around 8 Gigawatts of power.

The only solution is to either wait a very long time for the device to suck up gigawatts of power and pay off its debt, or hand-drill up the device and replace it.

I am assuming this is a mod issue rather than a base-game bug since this mod adjusts AC power usage, but I have not had a chance to explicitly test that. No hard numbers yet, if I am able to pin down specifics I'll add them.