I have one battery of car, I think that it is possible have 4000 WATS of power, but I'm not sure about this. I would like have a modified square-wave ( maximum duty cycle is 35 % and frequency is from5 Hz to 130 Hz). I was thinking about two converters. First I use a Mosfet + a pulse transformer to one output of 500V and then with another pulse transformer to second output of 1000V!