The Gray Motor was verified in the past to operate at over 300 COP, which means 300 times more work was demonstrated compared to the net loss in the batteries that were powering the motor.
Al Francoeur happens to own the largest collection of the remnants of Ed Gray's technology and he has been diligently working to reverse engineer the power supply to see what if any components or how it is built is operating in some unusual way. Al's reverse engineering is a work in progress and in this presentation - Electricity, Gravity, Magnetism & Singularity - he presents his power supply findings to a public audience for the first time. Watch Aaron Murakami's interview with Al on the right.