The Template Solar Energy Development Ordinance for North Carolina defines solar energy systems, in part, based on their physical size measured in acres. According to the state’s model ordinance, Level 1 Solar Energy Systems include those that are “ground-mounted on an area of up to 50 [percent] of the footprint of the primary structure on the parcel but no more than [one] acre,” and Level 2 Solar Energy Systems are ground-mounted systems with a footprint of less than or equal to a half acre in residential districts, less than or equal to 10 acres in general commercial business and office-institutional districts, and of any size in industrial districts. Finally, solar energy systems that do not satisfy the parameters for Level 1 or 2 systems are designated as Level 3 Solar Energy Systems.