He said 55amps not watts. 55amps could be any wattage. for example at 600V that would be 33,000 watts, or at 1V it would be 55watts.
I assume any over unity power claims are BS from the start, also driving a ICE on on-demand HHO is BS too. You will inherently get more torque for your watt if you were to just use an electric motor (with the exception of improved ICE eff with small amounts of hho)