Well, if you were to follow some of the links you would discover that the device(s) have been running/operating a factory as part of a test of sustainability. I will run for one year,
I has been running for 7 months ok so far .
there is a countdown clock on the link
At the end of the year the location & customer will be announced. etc..
Then everyone will pretend they always believed in cold fusion after all. such is thee history of Scientism.
I believe that controlled nuclear fusion (cold, hot or tepid, I don't know) for usable energy production will, one day, become fact.
Nuclear fission was developed, initially, as a form of weapon and has been refined to be a very efficient means of energy production. Nuclear fusion also was developed as a weapon, and that was many years ago. Yes, there are hurdles to be overcome to refine it into a controlled means of energy production, but I don't see why this shouldn't happen in time.
What I don't believe, however, is the stuff proposed by this Rossi gentleman. He makes many claims and attempts to back them up with lots of gobbledegook, but there is a distinct lack of any hard evidence.
I do admit, though, that there have been gifted individuals in history (Tesla, for example) who have not had the backing (at least initially) of large organisations of high-standing and who have made astounding discoveries. However, I see no evidence of Rossi being one of them.
Perhaps I shall be proved wrong.