Worth pointing out that the event on the 24th has only ever been described as a demonstration by Rossi. Zero 'official' claims have been made.........
Nobody knows just what will happen, as is obvious from the various forecasts that it won't take place at all. Or the meaningless disdain of the cliche "dog & paony show."
I don't know either but think it likely that you will see the E-Cat QX produce 20 Watts, with various periods of self sustain, for the period you are there. I hope he has made a new power pack that doesn't draw much power when it is not powering the reactor, or you will just be shown the power output of the power pack, not the input. That would provide the ascetics with a field day.
Rossi says he will not release details until he is ready for mass production. I think it will take at least two years to produce a reliable, tested, commercial version. Rossi will probably sound more optimistic.
The real puzzle is why he is holding the demo at all. I suspect it is partly to offset the bad publicity from the Dorval affair and also to start marketing. There would not be much point in developing an automated plant if there are not ready customers for the output.
Contrary to many here, I find Rossi is taking an intelligent business route. Presumably we will know more after the 24th.