Solar cells for current generation; solar wafer for the production of solar cells; solar cells for current generation, integrated in cladding panels (front of a building); photovoltaic devices and systems including control and regulation equipment as safety units; current converters and inverters, in particular for photovoltaic systems or fuel cells; current transformers; current meters; generating plant and equipment built of fuel cells or photovoltaic modules as energy source; monitoring installation for photovoltaic systems, in particular for remote monitoring; regulation and safety units for photovoltaic systems; cable channels (electrical) for photovoltaic systems; current transmission lines; measuring, control and regulation equipment, electrically, electromechanically, electronically, mechanically or hydraulically typed, in particular for heating systems and devices, water heaters, water treatment devices, solar systems, photovoltaic systems and parts thereof; overpressure and safety valves adjusted to the goods in this class; glass covered with an electric conductor; glass with coating for current generation; control and regulation equipment, included in class; remote control devices; display units (electrical); anodes; fuel cells