These guys have been doing the hydrogen thing for a while now. And they sell stand alone hydrogen powered gensets . Man do I wish I could figure out how they do it! go to the section on the side bar where it says "BUY IT NOW " and all the gensets will be displayed.
www.supportamerica.com
If anyone knows anything about them let me know. I bought a hydrogen booster off them about 1.5 years ago. That was what got me into all this. that and a couple heavy chevy SUV's.
-rodney