Not just that, the other trend is that panels used for solar farms have massively increased in size & capacity. The panels we are now buying for our solar farms

Not just that, the other trend is that panels used for solar farms have massively increased in size & capacity. The panels we are now buying for our solar farms are 660W, and over 2 meters long. While not as feasible for roof mount (although we're speccing 575W panels for commercial rooftops), these large panels reduce our associated balance of system costs on a $/W basis.