That was just an introduction because there are also some people critizing his measurement method and circuit below on one of the page I gave a link to.
I've done some DD on this subject and found more interesting things more related to Carmil.
Like the work of Tom Bearden:
"There are at least 20 or more legitimate COP>1.0 EM power systems by various inventors and researchers in the U.S. alone"—Tom Bearden
In the year 2000, a team headed by Dr. Tom Bearden successfully tested an Overunity device known as the Motionless Electromagnetic Generator.
Consisting of a modified pulsed transformer utilizing the Bohm-Aharonov Effect, the overunity experiments have been replicated by researcher J-L Naudin in France.
Further details will be released when Patent matters have been concluded.
An explanation of its functioning appeared in Foundations of Physics Letters, Vol. 14, No. 1, 2001 - "Explanation of the Motionless Electromagnetic Generator with O(3) Electrodynamics, by 14 authors.