Yes, I think we're using "solar powered" differently. I took it to mean "hook the device up to a square mile of solar cells so it can get the 100MW it needs". If you can leave it out in the sun, and it just works, in a reasonable time period, that would be a breakthrough. But I would be surprised as these are very endothermic reactions so somehow NOT having to put in a lot of power would imply they're breaking the laws of thermo-dynamics...
We actually did the same thing back in sixth form chemistry...