## JA11.3 Shading

The PV array shall meet either
JA11.3.1 or JA11.3.2.

### JA11.3.1 Minimal Shading Criterion

The minimal shading criterion is that no
obstruction is closer than a distance (“D”) of twice the height (“H”) it extends
above the PV array. (See Figure JA11-1 for an artistic depiction of “H” and
“D.”) As Figure JA11-1 illustrates, the distance “D” must be at least two times
greater than the distance “H.” All obstructions that project above the point on
the array that is closest to the obstruction shall meet this criterion for the
array to be considered minimally shaded. Any obstruction located north of
all points on the array need not be considered as shading obstructions.
Obstructions that are subject to this criterion include:

(a) Any
vent, chimney, architectural feature, mechanical equipment, or other obstruction that
is on the roof or any
other part of the building.

(b) Any
part of the neighboring terrain.

(c) Any
tree that is mature at the time of installation of the PV system.

(d) Any
tree that is planted on the building lot or neighboring lots or planned to be
planted as part of landscaping for the building. (The expected shading shall be
based on the mature height of the tree.)

(e) Any
existing neighboring building or structure.

(f)
Any planned neighboring building or structure that is known to the applicant or
building
owner.

(g) Any
telephone or other utility pole that is closer than 30 feet from the nearest
point of the array.

*Figure JA11-1: The
Minimal Shading Criterion Artistic Depiction of "H" and "D"*

### JA11.3.2 PV Array Geometries Performance
Input

If the PV array does not meet the
minimal shading
criterion as specified in JA11.3.1, then the detailed geometries of the PV array
shall be described in the performance method.