Admittedly it is not my field, but back of the envelope calculations in a sun synchronous orbit with the radiators pointed towards deep space seem pretty plausible with about 1.3 to 1.7 ratio of solar area to radiator area.

Like, it's not "great" but if you're not flying around the sun every 72 minutes or whatever and you can keep your panels sun on and radiate into deep space, the numbers aren't bananas.

https://youtu.be/FlQYU3m1e80

"Is It Really Impossible To Cool A Datacenter In Space?" - Scott Manley

tl;dr -> not impossible.