Photovoltaic apparatus and installations for generating solar electricity; photovoltaic apparatus for converting solar radiation to electrical energy; scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus and instruments for regulating or controlling gas; alarms for the detection of inflammable gases; solar-powered rechargeable batteries; solar batteries; combustion gas and waste gas analysers; gas testing instruments; apparatus for analysing and detecting gas; gasometers [measuring instruments]; gasometers; solar panels; electricity transformers, limiters, electricity inverter; apparatus and instruments for accumulating and storing electricity; apparatus and instruments for regulating and controlling electric current; solar cells for electricity generation; solar panel arrays; photovoltaic solar modules; solar batteries; electronical sensors for measuring solar radiation; electricity measuring instruments; electricity measuring instruments; data processing equipment, computers; computer software; fire-extinguishing apparatus.

Construction, in particular the construction, installation, repair and maintenance of networks and pipelines for the distribution of gas and all kinds of energy; assembly, installation, repair and maintenance of gas equipment, pipelines, boilers, gas and electricity fittings and installations, apparatus for heating, air conditioning, ventilating and refrigerating purposes; installation of solar heating systems; installation of solar powered systems; installation and maintenance of solar thermal installations; underground construction work relating to pipework; management and supervision of construction works and projects; underground civil engineering services; installation of solar power systems; installation services and underwater repair; construction of structures for the storage of natural gas and crude oil; construction of structures for the production and transport of natural gas and crude oil; drilling for the extraction of gas and oil; repair of gas supply systems; mining, and oil and gas extraction; underground construction relating to gas supply mains and pipes.