I played with chokes on the powerlines as descriped by Bob Boyce.
I see clearly on the scope less polution on the cell measured.
I also tuned the circuit so, all signals are in phase.
See pics. As you can see, the volts are multiplied when the peaks fall over eachother...Thats why the 10khz is higher.
Even at 20 or 30V on the FETS, the amps are lower then 1. Maybe i need take some windings of the primairys, so more amps will be pulled and the greater the magnetic fields can become and the higher the voltage burst on the secondairy.
br
Steve