Illinois Statutes Chapter 765. Property § 165/10. Definitions

(1) an assembly, structure, or design, including passive elements, used for gathering, concentrating, or absorbing direct and indirect solar energy, specially designed for holding a substantial amount of useful thermal energy and to transfer that energy to a gas, solid, or liquid or to use that energy directly; or

(2) a mechanism that absorbs solar energy and converts it into electricity; or

(3) a mechanism or process used for gathering solar energy through wind or thermal gradients; or

(4) a component used to transfer thermal energy to a gas, solid, or liquid, or to convert it into electricity.

(1) a complete assembly, structure, or design of solar collector, or a solar storage mechanism, which uses solar energy for generating electricity or for heating or cooling gases, solids, liquids, or other materials; and

(2) the design, materials, or elements of a system and its maintenance, operation, and labor components, and the necessary components, if any, of supplemental conventional energy systems designed or constructed to interface with a solar energy system.