The shape of a solar farm affects the size of the setback
Even if the area of a solar farm and the width of the setback are held constant the shape of the solar farm impacts the area required for the setback.
Shape & Setback Area
|100 Feet||Circle||1,000 Acres||3680.7 Foot Radius||55.1 Acres|
|Square||6,254 Ft X 6,254 Ft||62.1 Acres|
|Nearly Square Rectangle||8,000 Ft X 5,320 Ft||63.3 Acres|
|Long Narrow Rectangle||80 Ft X 532,000 Ft||2,501.1 Acres|
As you can see setback around a circle requires the least amount of area. The shape of a rectangle can dramatically increase the setback area even when the size of the solar farm and setback distance is held constant.