All the sources of power to run anything are also sources of heat. Doesn't matter if they're the sun or RTGs, they're unavoidably all sources of heat.
> Since it's fucking cold up there already?
Better to describe it as an insulator, rather than hot or cold.
> If I had those resorces at hand, I'd try.
FWIW, my "if I had the resources" thing would be making a global power grid. Divert 5% of current Chinese aluminium production for the next 20 years. 1 Ω the long way around when finished, and then nobody would need to care about the duty cycle of PV.
China might even do it, there was some news a while back about a trans-Pacific connection, but I didn't think to check if it was some random Chinese company doing a fund-raising round with big plans, or something more serious.