Rossi's technology worked and I'm convinced his current technology most likely works - although we need a third party report to make sure. It's basically the same effect that's being utilized in The SAFIRE Project reactor and Brilliant Light Power's Suncell. Moreover, it was utilized a long list of technologies going back a hundred years. In short, if you produce a macro-EVO (plasmoid, fireball, complex space charge configuration, plasma ball, etc) utilizing the negative resistance regime or another method (RF/MW), tune it into resonance, and make sure it exists within an optimal atmosphere (which includes hydrogen/deuterium), you will get excess energy in multiple forms. It's that simple. Period. End of story. No further discussion needed.
No. E V O 's do not exist long enough.
And there is NO technology making them last long enough, to get a net win out.
No further discussion needed.