Thermal energy measuring apparatus; Solar energy operating apparatus; Apparatus for managing energy supplies; Ceramic parts for converting electrical energy into mechanical energy; Devices for measuring energy; Devices for switching over energy tariffs; Electrical apparatus (other than generators) for use in energy supply; Electrical thermal processing apparatus utilising infrared energy; Energy control devices; Energy regulators; Glass for protection against high energy radiation; Optical energy transfer apparatus; Solar energy collectors for electricity generation

Installation of solar energy systems