Okay, so on this podcast they have an interview with an expert in space-based solar power. NASA published a recent study about it, and while he thinks that they made some wrong assumptions (such as that the price to launch something into space will stay the same), he points out that using NASA's numbers, you're looking at less than $1/kwh.
Hundreds Of Hydrogen Fuel Cell Electric Vans To Flood The Streets That's in Europe. Meanwhile, in the US GM And Honda Begin Production Of Hydrogen Fuel Cells In Their New U.S. Facility