Nebraska Revised Statutes Chapter 66. Oils, Fuels, and Energy § 66-905. Solar energy system, defined

Solar energy system shall mean a complete design or assembly consisting of a solar energy collector, an energy storage facility when used, and components for the distribution of transformed energy to the extent that they cannot be used jointly with a conventional energy system. Passive solar energy systems are included in this definition but not to the extent that they fulfill other functions, such as structural or recreational.