> For 200 kW, you would need a system 12.5 times larger, about 531 square meters—2.6 times larger than the solar array. The satellite would be enormous, larger than the ISS, and all of that for only three racks.

Starlink gen 3 satellite is designed to dissipate 250 kW. You are talking about an already solved issue, with real hardware already being built today.