Abstract: Apparatus for converting the output of a high voltage D.C. source to a lower voltage and a higher current comprising a plurality of power conversion modules connected electrically in series across the D.C. source output so that each of the power conversion modules receives only a portion of the high voltage, each power conversion module including means for converting the high voltage portion to an A.C. signal and transformer means for reducing the voltage and increasing the current of such A.C. signal, the outputs of all of the transformer means being connected electrically in parallel. Each of the power conversion means includes a pair of capacitors which are charged by the high voltage D.C. source and which are alternately, periodically only slightly discharged to convert the D.C. voltage to an A.C. signal.