Comment by DoctorOetker

> The intractable problem is heat dissipation.

3 times the area of the heat dissipating surface compared to solar panel surface brings the satellite temp down to 27 deg C (300 K):

https://news.ycombinator.com/item?id=46862869

> There is to little matter in space to absorb excess heat.

If that were true the Earth would have overheated, molten and turned to plasma long ago. Earth cools by.... radiative cooling. Dark space is 4 K, thats -267.15 deg C or -452.47 deg Fahrenheit. Stefan-Boltzmann law can cool your satellite just fine.

> You'd need thermal fins bigger than the solar cells.

Correct, my pessimistic calculation results in a factor of 3,...

but also Incorrect, there wouldn't be "fins" thats only useful for heat conduction and convection.