0
Fixed
RTG slots don't degrade
Well, I think they do, but at such a low rate that they effectively don't. In my current playthrough I had an RTG installed for 3 sols now, and its slot still didn't drop 1% during that time. At this rate, they practically don't require maintenance ever, since even at a moderate starting condition they'd last 100-150 sols before breaking.
On a marginally related note, solar panel mounts also degrade very slowly, maybe at half/third of the rate of the other component slots, but it's at least somewhat noticeable, unlike the RTG.
Customer support service by UserEcho
There was an extra zero in the degradation rate of the RTGs. Good catch.