Roof-mounted arrays (a) and Nth Wall arrays (b) long-term energy generation data. (Note that the north-facing Array C long-term production figure was actually 621 kWh, erroneously swapped in the installer's array diagram with Array B production data (415 kWh)). Each of the grow-rooms (2, 3, and 4) had 5 vertical columns of solar windows installed across the north-facing wall and roof areas; the wall height was 3 rows of windows. A conventional louvre-type window was placed in the middle of solar-window wall in each room, shown as clear space in  diagram. 12-window Array A from the west-facing wall is not shown.