It looks like ISS can generate 240KW peak from 2500m2 of solar panels, and runs at half of that nominally [0].

A single B200 can consume up to 1200W. A single GB300 system needs 14.5kW. So, you can only have ~15 (incl. satellite's energy needs) GB300 with ISS' solar panels, which is absurd. See [1] for the size of the panels we're talking about.

People dream about Starlink-style close flying systems to aggregate them to a single data center. With these power requirements, it's more like an AI hallucination. If we can build way more efficient chips or run smaller models on modest hardware, etc. We may go there, but needing ISS sized solar panels to run frontier models in space?

Also, don't forget the radiators. You also need those to pump that heat out of these systems.

The outlook doesn't look good at this point.

[0]: https://en.wikipedia.org/wiki/Solar_panels_on_spacecraft#Spa...

[1]: https://www.sgmk.edu.pl/wp-content/uploads/2025/10/iss.png