[golem14]

https://www.mdpi.com/1996-1073/16/10/4010

40% isn't much in the grand scheme of things, but maybe they can reach higher reduction with more research/materials. Mass and power are pretty cheap for spaceX, so shipping more solar panels and a heap pump might not be a deal breaker.

Would e.g. a reduction of 90% in radiator area change the overall picture on the overall feasibility? I think not, it would still be ludicrous, but I'd be happy to be proven wrong.

[typ]

The radiator area is probably not what they need to worry about that much as we thought. When the energy input comes from solar 100%, they just need to optimize the ratio of the sectional area facing the sun over the total surface area of the satellite. If the ratio is low enough, like a fin or cone shaped object, it will be harder to be hot.

[golem14]

Are we not talking about radiating away the energy used to run the DC ? I assume the solar panels should face the sun, radiate leftover energy away, hopefully as little as possible as solar cells get more efficient.

The radiators are for dissipating the waste heat coming from the data center equipment. I'd agree they better not be pointed at the sun ;) In fact, the DC should probably hide behind the solar array to not pick up extra heat from the sun.

The radiators, also behind the solar array, will also be hot because of the DC waste heat being conducted there ;)

I probably completely misunderstood your point.