Tennessee Code Title 7. Consolidated Governments and Local Governmental Functions and Entities § 7-34-114

(a) The governing body of a municipality issuing bonds pursuant to this chapter shall prescribe and collect reasonable rates, fees or charges for the services, facilities and commodities of such public works, and shall revise such rates, fees or charges, from time to time, whenever necessary so that such public works shall be and always remain self-supporting. The rates, fees or charges prescribed shall be such as will produce revenue at least sufficient to:

(b) When such public works supplies its services to consumers who use solar or wind powered equipment as a source of energy, such public works shall not discriminate against such consumers by its rates, fees or charges or by altering the availability or quality of energy.

(c) Any consumer who uses solar power, wind power, or other auxiliary source of energy shall install and operate the equipment, property, or appliance for such energy source in compliance with any state or local code or regulation applicable to the safe operation of such equipment, property, or appliance.