Not sure if the efficiency is just being measured using the amount of electricity used on the input compared to the power produced at the end as a basis. As I understand it the electricity measured on the input is to extract the hydrogen from the water, and the electricity measured on the output is from what the hydrogen produced through the generater.

Does one have to consider the hydrogen in the water with the electricity on the input side when measuring what is being fed into the EBH2. If that was considered then the output may not equal the 100 percent or more exchange when considering what energy the EBH2 unit is producing. Sounds like only electricity is being measured. But when you factor in hydrogen on the input the equation should change and I don't think the energy in (using electricity and hydrogen as total energy) will be less than energy out. But the hyrogen produced run through the EBH2 unit may produce more electricity on the output.

Also would this change depending on the quality of water being used. I would hope the validation process will use water brought to the validation by HPQ such as salt water and tap water as well as standing water from a pond/lake/or puddle. 

Most science fiction stories have led to reality such as space travel. When they started talking about sending man into space most didn't believe that could actually happen, and now it happens more and more. I am having a hard time believing this EBH2 is going to be anything more than a distraction, but you never know.

I don't know the answers but sure is an interesting conversation.