Renewable energy installation. Renewable energy installation" means a fixture, product, system, device or interacting group of devices installed behind the meter at a qualifying property, or on contiguous property under common ownership, that produces energy or heat from renewable sources, including, but not limited to, photovoltaic systems, solar thermal systems, highly efficient wood heating systems, geothermal systems and wind systems that do not on average generate more energy or heat than the peak demand of the property.