37 Installation of apparatus for new energy and regenerative energy production; construction of installation for new energy and regenerative energy production being factories; construction of new regenerative energy factory including solar energy and wind power; repair and maintenance of wind power plants; installation of photovoltaic power generators; maintenance of photovoltaic power generators; consultancy relating to the installation, maintenance and repair of windmills and wind turbines; installation, maintenance and repair of solar installations for generating power; installation, maintenance and repair of solar collectors; machinery installation, maintenance and repair