Justin,
He's got three generations of them, and he is safety and durability testing each of them for a year a piece
(sounds like a lot, doesn't it? But that is what is required here in the USA)
One is built, sold and half verified in place at the customer's plant
=======================================
A better one, built and 1/3 verified at the same facility
A brand new one that works even better but requires a new widget that is much more durable than what has been built before (some tech help, please NASA) but this one will be able to roll off the certificates of the first two once they are granted.
And yes ......
Rossi is catching grief for taking so long to verify each design, but he is running them concurrently so he isn't wasting as much time as people think.
He is also watching the wind shift right now and when it swings around and fills his sails right then the good ship Rossi LENR ship will move away from the dock.
Somebody ripping his design and moving it forward in China or Russia would actually help shift the wind more quickly since the Chinese and Russian commercial "UL" requirements are not nearly as detailed and time consuming.