Ten years before I got ready to build I went to an Open House at a new development north of here precisely to see the house that had the fuel cell generator. At that time it was about the size of two or three large freezers and ran on natural gas.
The tech and I talked a lot. He figured that within ten years the same product would be about the size of a cabinet freezer and perhaps $10K in cost. It would easily run on propane (which is what I knew I'd have in the mountains).
Flash forward ten years, I'm getting ready to build and search online for fuel cell companies--and find virtually no changes since that initial visit. Nobody was selling a house-capable fuel cell generator, they were more custom built than mass produced, and finding a good way to handle the recharge filters wasn't really standardized yet.
Needless to say I was quite disappointed. Ended up going with solar which I do like, but not making power 24x7 is quite annoying.
Maybe someday.....either this or Mr. Fusion!
Ferret