The largest I've seen anyway, seen flying back from Nevada the other day. What puzzled me at first was their sheer size, which I first took to mean they were grid tying the closest farm house, but that farm house was quite modest for an array this size. Maybe for the irrigation pumps..., but then I saw another, and another, and for the next several miles saw more of them scattered thruout the countryside. Then it struck me, it was hard to see at first with the snow cover, but these 48 module pole mount arrays were all in the dead zones (odd ball shaped pieces of ag ground not covered by the big sprinklers) just outside of the pivot irrigation systems.