37 Cleaning of solar modules, photovoltaic cells, solar energy based power plants; Electrical repairs and installation of wind energy facilities, photovoltaic installations, solar energy systems and alternative energy systems; Electrical repairs, maintenance, and installation of electrical wiring, outlets, light fixtures, and electrical panels; Comprehensive preventative maintenance service for electrical systems; Installation and maintenance of photovoltaic/solar thermal hybrid installations; Installation and maintenance of solar energy based power plants; Installation, maintenance and repair of wind energy facilities, photovoltaic installations, solar energy systems and alternative energy systems; Providing information related to the installation, maintenance and repair of wind energy facilities, photovoltaic installations, solar energy systems and alternative energy systems; Refurbishing of wind energy facilities, photovoltaic installations, solar energy systems and alternative energy systems; Repair and maintenance of wind power plants; Repair and installation services, namely, the installation of heating, cooling and environmental control systems primarily using solar energy, renewable energy resources and rainwater; Repair services for electric generators and wind turbines