Earlier this week the New York Times published an article about how environmental issues have become a major force in political advertising during this election cycle.
How Not to Install PV - Orientation & Shadowing
These are photovoltaic powered restrooms. The view is to the Northeast at about noon in February. The photovoltaic module provides power for operating a vent fan for a composting toilet. Unfortunately, the photovoltaic module on the right restroom is facing West and as a result gets very little sunshine. In addition, the shadow cast by the vent pipe is shading the module and further reducing the output.