37 Installation, maintenance and repair of photovoltaic installations; installation, maintenance and repair of photovoltaic modules; installation of photovoltaic cells and modules; maintenance, repair and reconditioning of photovoltaic apparatus and installations; installation, maintenance and repair of solar installations for generating power, solar collectors and photovoltaic modules; installation, maintenance and repair of energy conversion apparatus, power plants, wave energy conversion apparatus and wave energy power plants; repair and maintenance of energy generating installations; installation, maintenance and repair of wave energy conversion apparatus and wave energy power plants; installation, repair and maintenance of wave energy conversion apparatus and wave energy power plants; installation, maintenance and repair of solar energy systems; maintenance and repair of wave energy power plants; repair and maintenance of wave energy power plants; installation, construction, maintenance, servicing and repair of energy and power generating apparatus, equipment and installations; installation, maintenance and repair of boiler systems and solar energy systems; installation, maintenance and repair of energy conversion apparatus and power plants; installation, maintenance and repair of inverters, batteries and electrical connection apparatus for solar energy systems; installation, repair and maintenance of energy conversion apparatus and power plants; installation, repair and maintenance of equipment for the production of energy from renewable sources; building construction project management; building construction supervision; construction services, namely , namely, site preparation and clearance services; construction supervision; cleaning of electrical motors; installation of engines; installation of motors; maintenance and repair of motors; maintenance and repair of engines; maintenance, servicing, tuning and repair of engines and motors; rebuilding and reconditioning of engines and motors; repair of parts of engines; repair services relating to engines; tuning of engines; information, consultancy and advisory services relating to all the aforementioned services; off-site building construction project management