If I remember correctly it was 36 rows 24 wide, strings of 12 panels 180w @48v = 576v ea. then a mirror image of panels (not yet installed in the picture, on the other side of the ridge cap to the left. You can see the unboxed panels on the other side. all USE cable run in gutter also not yet installed at time of photo. the array looks preetty good too from the sattelite photos thru google earth. oakland airport fedex building. We also do small resi jobs 1 to 5k, but this happened to be the first job I assigned to. Chris