Put a radiator in the shadow of the satellite. The radiator size needed is similar to the solar panel size. Look at the International Space Station; the solar

Put a radiator in the shadow of the satellite. The radiator size needed is similar to the solar panel size. Look at the International Space Station; the solar panels are larger than the radiators, and the occupants are far more heat sensitive than semiconductors. The hotter the radiator, the better it radiates.