As for Dr. Essen, no doubt he is capable and has done good work in the past. However, it can be said with fairness that he was too trusting of Rossi and did not ask the right questions of him.
No, his trust was not based on Rossi.
From: https://www.nyteknik.se/energi…e-to-embrace-this-6421305 (Feb 23, 2011)
Mats Lewan: What is it that makes you think it may be credible despite the lack of some essential pieces of information?
Kullander: Well, partly because …
Essén: What I think is important in this context is that for the first time, so to speak, there is a device which is made in many units and which is being sold, and has been tested by independent people -- input, output -- how much energy that comes in and how much that comes out, in circumstances which these people have controlled.
And that has not happened before in this context. So the physicist Levi believes in this, and the physicist Focardi believes in this, and I believe (their credibility) is above all doubts. It is of course difficult to assess the inventor Andrea Rossi, but there are enough people involved, and enough good data and reports to make it look very seriously at this stage.