4
Electrical energy from wind power
7
Wind turbines; Generators for wind turbines; Wind-powered electricity generators
9
Photovoltaic modules; Calibrated photovoltaic reference cells; Photovoltaic installations for generating electricity [photovoltaic power plants]; Photovoltaic apparatus for generating electricity; Photovoltaic apparatus and installations for generating solar electricity; Photovoltaic apparatus and installations for generating solar electricity; Photovoltaic apparatus for converting solar radiation to electrical energy; Solar energy collectors for electricity generation; Solar cells for electricity generation; Solar panels for the production of electricity
37
Construction of wind power plants; Maintenance and repair of wind power plants; Repair services for electric generators and wind turbines; Repair services for electric generators and wind turbines; Installation of photovoltaic cells and modules; Installation and maintenance of photovoltaic installations; Installation and maintenance of photovoltaic installations; Maintenance, repair and reconditioning of photovoltaic apparatus and installations; Power infrastructure construction
40
Energy production; Electricity generating; Generation of electricity from solar energy; Generation of electricity from wind energy
42
Engineering services relating to energy supply systems; Technological consultancy in the fields of energy production and use; Technical project planning in the field of engineering; Conducting technical project studies; Provision of information concerning research and technical project studies relating to the use of natural energy; Conducting technical project studies