9 Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking being supervision, life-saving and teaching apparatus and instruments, namely, apparatus and instruments for controlling, testing, analysing and improving photovoltaic devices, namely, electrical controllers, for use with photovoltaic components, optical inspection apparatus, for use with photovoltaic components; photovoltaic modules and photovoltaic system components, namely, photovoltaic solar modules, photovoltaic cells, photovoltaic inverters; Electronic device for monitoring and optimizing photovoltaic arrays; Surveying machines and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, photovoltaic cells and modules, inverters, photovoltaic inverters, converters, thermoelectric converters, apparatus for converting electronic radiation to electrical energy, namely, photovoltaic roofing members, photovoltaic cladding panels, photovoltaic solar hybrid modules, photovoltaic thermal hybrid module, photovoltaic thermal module; Material testing instruments and machines for the analysis of photovoltaic materials, namely, electrical apparatus for testing the state of operability of photovoltaic modules; Electronic apparatus for testing compression, strength, hardness and tensile characteristics of industrial materials; Semi-conductors; Wafers being silicon slices; Solar cells; Solar collectors for electricity generation or energy production and structural parts and components parts thereof; Photovoltaic solar modules for electricity generation and structural parts and components parts thereof; Lasers, not for medical purposes; Recorded computer programs for controlling, analysing and improving photovoltaic devices, photovoltaic materials, solar cells, photovoltaic modules and photovoltaic system components; Computer programs, namely, downloadable software for controlling, analysing and improving photovoltaic devices, photovoltaic materials, solar cells, photovoltaic modules and photovoltaic system components; downloadable electronic publications in the nature of books, magazines, articles, manuals and teaching material in the field of photovoltaics