37 Installation, maintenance, and repair of electric power sources, namely, distributed energy resources, energy storage systems, controllable loads, thermostats, and water heaters; Construction, installation, maintenance, and repair of electric fueling systems, and the equipment therefor; Construction, installation, maintenance, and repair of solar photovoltaic and grid-connected systems for both residential and commercial consumers, namely, single-home rooftop solar panel systems, business rooftop systems, and community solar farms; general construction contracting; construction project management services in the field of solar energy systems for residential and commercial use; Installation and maintenance of solar thermal installations and solar energy systems for residential and commercial use; Installation, maintenance, and repair of computer hardware systems for others for use in energy storage systems that monitor energy consumption and management analytics of electrical grids and energy loads for the efficient operation of thermostats and water heaters; Installation, maintenance, and repair of compressed natural gas fueling systems, equipment and vehicle refueling appliances, and technical consultation in conjunction therewith; construction of natural gas service and fueling stations; maintenance and repair of compressed natural gas systems and equipment; consultation services in the field of converting land vehicles to natural gas and refueling of natural gas vehicles; Providing utility information in the fields of natural gas and compressed natural gas extraction by means of computer networks