“For some reason there’s been a bizarre debate about radiators in space,” he said. “It’s safe to say SpaceX knows how to do heat rejection in space with 10,000 satellites in orbit.”
I'm sure they can manage heat issues so long as the scale of these satellites are very modest.
If instead you picture a satellite with some compute modules in it you’re good. Can a satellite generate power? (Yes) can a satellite scrub heat equal to the amount it can generate with solar panels? (I don’t know, ask someone who has done it successfully a few times)