Another experiment is said to have happened on April 21. 2011, where the weight of the cooling water was measured before and after the experiment. A report of the report is said to come from the Swedish physicist Hanno Essen.
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A further experiment, allegedly planned for April 21, 2011<ref>http://energycatalyzer.blogspot.com/2011/04/rossi-brings-e-cat-to-stockholm-royal.html</ref>, where the E-Cat would have been given to the Swedish scientists Sven Kullander and Hanno Essén of University Uppsala for testing, was denied in afterwards by Rossi.<ref>http://energycatalyzer.blogspot.com/2011/04/andrea-rossi-no-e-cat-test-at-uppsala.html</ref>