An apparatus for converting power from a bipolar DC source (1, 2) to supply an AC load, the apparatus having plus and minus terminals (64, 65), said apparatus comprising: a bipolar DC source (1, 2) having positive and negative monopoles (3, 4, 5, 6), and corresponding voltage potentials, with respect to a common earth ground or with respect to a neutral point of the AC load; a DC ground fault interrupt circuit including a means for detecting a fault current in either monopole of the bipolar DC source to the common earth ground or to neutral point of the AC load and a means of automatically interrupting the flow of said fault current, the DC ground fault interrupt circuit comprising a first fuse, a second fuse, a first contactor, a second contactor and a third contactor, wherein said bipolar DC source having a plus and minus terminal for each monopole, and where the minus terminal of the positive monopole is connected to earth ground through the first fuse and where the plus terminal of the negative monopole is connected to earth ground through the second fuse, and where the tr first contactor is connected between the plus terminal of the positive monopole and the plus terminal of the apparatus for converting power from a bipolar DC source to supply an AC load, and where the second contactor is connected between the minus terminal of the negative monopole and the minus terminal of the apparatus for converting power from a bipolar DC source to supply an AC load, and where the third contactor is connected between the minus terminal of the positive monopole and the plus terminal of the negative monopole, and where there is a means of detecting an open first or open second fuse and a means of opening the first, second and third contactors (10, 11, 12) in response to an open fuse being detected. a bipolar DC source (1, 2) having positive and negative monopoles (3, 4, 5, 6), and corresponding voltage potentials, with respect to a common earth ground or with respect to a neutral point of the AC load; a DC ground fault interrupt circuit including a means for detecting a fault current in either monopole of the bipolar DC source to the common earth ground or to neutral point of the AC load and a means of automatically interrupting the flow of said fault current, the DC ground fault interrupt circuit comprising a first fuse, a second fuse, a first contactor, a second contactor and a third contactor, wherein said bipolar DC source having a plus and minus terminal for each monopole, and where the minus terminal of the positive monopole is connected to earth ground through the first fuse and where the plus terminal of the negative monopole is connected to earth ground through the second fuse, and where the tr first contactor is connected between the plus terminal of the positive monopole and the plus terminal of the apparatus for converting power from a bipolar DC source to supply an AC load, and where the second contactor is connected between the minus terminal of the negative monopole and the minus terminal of the apparatus for converting power from a bipolar DC source to supply an AC load, and where the third contactor is connected between the minus terminal of the positive monopole and the plus terminal of the negative monopole, and where there is a means of detecting an open first or open second fuse and a means of opening the first, second and third contactors (10, 11, 12) in response to an open fuse being detected.