Here’s a worthy critique of the recent third-party E-Cat test in Lugano, Switzerland, by Ethan Siegel. He basically says the whole thing was a hoax. I don’t agree with the author for a variety of reasons, but mostly because almost all new scientific inventions had similar accusations thrown at them. The Wright Brothers, Edison’s phonograph, or Leeuwenhoek’s microscope? Take your pick. They were all considered hoaxes too in their time. Here’s Siegel’s article. And then, if you will, read this thorough, sound response from Michael Lammert.
By the way, if you want to read about how often this accusation has been made against other successful technologies and inventions, I recommend Stanton Friedman’s wonderful book Science Was Wrong: Startling Truths About Cures, Theories, and Inventions ” They” Declared Impossible.