Photovoltaic installations and systems, namely, photovoltaic-based power plants; solar collectors; solar heat collection panels; solar collectors comprised of glass components with integrated solar cells; solar collectors, namely, installations for heating water by means of sunrays; photovoltaic installations and systems, namely, photovoltaic cells also including a solar thermal collector sold as a unit; solar thermal installations and parts thereof comprised of solar thermal modules, solar cells and inverters sold as a unit; solar roofs, namely, solar collectors; solar collectors comprised of solar absorbers and solar heat collection panels; solar boilers, namely, solar water heaters; heat exchangers not being parts of machines; light reflectors for sunlight, in particular mirrors and cpc (compound parabolic concentrators), apparatus for converting and storing sunlight by means of physical, biological, or chemical methods for heating purposes and water heating, namely, hybrid solar collectors for generating heat; heat accumulators, steam accumulators, namely, sorption storage tank accumulators; solar collectors for heating, cooling and water heating, namely, flat collectors, vacuum tube collectors and storage collectors; steam generators; Solar glass panes for apparatus for water heating using solar energy, namely, solar absorbers for use in swimming pools and thermal siphon systems; solar glass panes for apparatus for heating, namely, those comprising solar technology or heat pumps