Let's suppose for a minute that Rossi actually has a working device, and that he's been unfairly snubbed by the patent offices in major regions, and that he's trying to slowly build up his business from the bottom rather than get investors and go big quickly.
Where are his satisfied customers? According to the Wayback Machine he's had this thing on the market for three years. He was supposed to deliver 30-100 of them in 2012. Is there not one of his customers willing to say "I bought this thing and it works as advertised, and it's saved me a lot of money on my power bills?"