Comment by DoctorOetker

no the radiator planes are in the shade, so you can increase the height of a pyramidal shaped satellite for a constant solar panel base, and thus enjoy arbitrarily low rest temperatures, check my calculation which I added.

for a target temperature of 300K that would mean the pyramid height would be a bit less than 3 times higher than the square base side length h=3L.

I even handicapped my example by only counting heat radiation from 2 of the 4 panels, assuming the 2 others are simply reflective (to make the calculation of a nearby warm Earth irrelevant).