Inverter for use with solar arrays

In a system for generating a 2N-phase electric current by switching means controlled by a controller to intermittently connect M pairs of solar arrays, each pair consisting of two identical arrays and listed in order of decreasing output voltage as (D.sub.1, D.sub.1 ') . . . (D.sub.i, D.sub.i ') . . . (D.sub.M, D.sub.M ') where 1.ltoreq.i.ltoreq.M and where each array has a positive terminal and a negative terminal, to the lines L.sub.l, . . . L.sub.k, . . . L.sub.N and to the lines L.sub.l ', . . . L.sub.k ' . . . L.sub.N ', where 1.ltoreq.k.ltoreq.N and where 1.ltoreq.M.ltoreq.N, the improvement comprising:

• grounding means connecting the negative terminals of D.sub.1, D.sub.2, . . . D.sub.M and the positive terminals of D.sub.1 ', D.sub.2 ' . . . D.sub.M ' to ground;
• and,
• control means for controlling the switching means to connect the positive terminal of D.sub.i to L.sub.k and simultaneously to connect the negative terminal of D.sub.i ' to L.sub.k ' for an interval of 90.degree./N beginning at ##EQU12## and for controlling the switching means to connect the negative terminal of D.sub.i ' to L.sub.k and simultaneously to connect the positive terminal of D.sub.i to L.sub.k ' for an interval of 90.degree./N beginning at ##EQU13## for all values of i and k, where 1.ltoreq.i.ltoreq.M and 1.ltoreq.k.ltoreq.N and where .delta. is any constant angle, whereby at any particular instant no more than one array is feeding a particular line, and whereby each array is utilized 100% of the time.