> a huge solar farm or something similar to power the electrolisis plant. Eventually it should be possible to build such things in space and then they can be h

> a huge solar farm or something similar to power the electrolisis plant. Eventually it should be possible to build such things in space and then they can be huge. There are already semi-serious proposals to solve the Earth's energy problems with space based solar collectors. Of course they would have to a lot bigger further out. Perhaps Jupiter's flux tubes could be tapped.