Installation, maintenance, repair and servicing of residential photovoltaic installations; installation, maintenance and repair of wind turbines and wind power systems; maintenance and repair of offshore installations and wind power plants; rebuilding and repair of turbochargers; installation, repair and maintenance of solar energy systems and wind energy systems, namely, turbines, generators, energy storage devices, control instruments, metering instruments, and replacement parts thereof; maintenance and repair of turbines, other than for land vehicles, and heat exchange equipment; installation, maintenance and repair of industrial machinery, rotating and reciprocating equipment, solar and wind power generation equipment and facilities, gas turbines, wind turbines, and steam turbines; maintenance, repair, replacement, and renovation of components, parts, or systems in steam and gas turbine generators; maintenance, repair, replacement, and renovation of components, parts or systems in rotating equipment, including pumps, generators, compressors, steam turbines, power turbines, gearboxes, electric motors, industrial engines, reciprocating engines, aero/aeroderivative engines, compressors, and hydro turbines; maintenance, repair, replacement, and renovation of ancillary equipment used in power generation in the nature of electro-mechanical skids, hydraulic skids, gas turbine auxiliary skids, heat recovery steam generators, steam engine boilers for power generation, electric generators, transformers, hydraulic controls for machines, hydraulic torque converters, hydraulic power units, hydraulic pumps, centrifugal pumps, gears, and electric control panels; Installation of capital spare parts for gas and steam turbines; Installation of control systems for rotating equipment; consulting in the fields of repair and maintenance for power generation equipment and other mechanical drive rotating equipment, including ancillary systems critical to their function, to assist oil and gas facility owners, operators and maintenance providers in improving production performance through use of critical rotating equipment; maintenance of power generation equipment and maintenance of power generation buildings; technical support services, namely, technical advice relating to the installation of gas and steam turbines and power generation equipment; building construction, building maintenance, and construction project management services for businesses in the power plant, oil and gas, industrial, power, and renewable energy industries; plant construction, maintenance and construction project management services for businesses in the energy production and transmission sectors; construction services, namely, construction of power plants and portions thereof to assist power plant owners and operators in providing gas turbine, thermal power and/or coal driven solutions; rebuilding, repair and remanufacturing of hydraulic pumps, hydraulic motors, hydraulic cylinders, hydraulic valves, servo valves and proportional valves; repair and maintenance of replacement and component parts for hydraulic machines; repair services for medical imaging equipment and supplies; maintenance and repair of medical diagnostic equipment; repair, maintenance, refurbishment and installation of healthcare and medical equipment, namely, surgical, imaging, and oncology equipment