42 Design of commercial and residential buildings; design and development of building materials, roofing materials, storage tanks, photovoltaic cells, modules, inverters, solar and thermal collection apparatus, solar and thermal collection instruments and systems, solar cells, panels, wafers, reflectors and collectors, computer hardware and software apparatus, namely, dc to dc converters and microinverters, equipment and instruments for tracking, measuring, monitoring and optimizing energy generation, use and loads, environmental sensors, apparatus and equipment for lighting, heating, cooking, refrigerating, air-conditioning and drying, solar and thermal collectors, receivers, reflectors and concentrators, solar and thermal panels, thermal solar energy storage apparatus and instruments for heating; information, advisory and consultancy services in the fields of commercial and residential building design and design and development of building materials, roofing materials, storage tanks, photovoltaic cells, modules, inverters, solar and thermal collection apparatus, solar and thermal collection instruments and systems, solar cells, panels, wafers, reflectors and collectors, computer hardware and software apparatus, namely, dc to dc converters and microinverters, equipment and instruments for tracking, measuring, monitoring and optimizing energy generation, use and loads, environmental sensors, apparatus and equipment for lighting, heating, cooking, refrigerating, air-conditioning and drying, solar and thermal collectors, receivers, reflectors and concentrators, solar and thermal panels, thermal solar energy storage apparatus and instruments for heating; installation and maintenance of computer software for tracking, measuring and optimizing energy generation, use and loads; providing information and consulting regarding the installation and maintenance of computer software for tracking, measuring and optimizing energy generation, use and loads; installation, maintenance and repair of software for tracking, measuring, monitoring and optimizing energy generation, use and loads