Photovoltaic cells; modules, namely, photovoltaic modules and solar cell modules; panels, namely, photovoltaic panels and solar cell panels; solar batteries; solar cells; solar concentrators; photovoltaic solar-thermal hybrid modules; electronic sensors for measuring solar radiation; apparatus for converting electronic radiation to electrical energy, namely, photovoltaic roofing members and photovoltaic cladding panels; silicon wafers; solar wafers; inverters; microinverters; photovoltaic inverters; solar inverters; converters; photovoltaic converters; solar energy converters; photovoltaic panel mounting system, comprised of solar panels, connectors, mounting rails, and a mounting structure, for use in providing heating and cooling load reduction and generating electricity, all sold as a unit; computer software and computer hardware for use in energy monitoring and energy management and for use in tracking energy usage; software for inventory management; Power electronics, namely, power conditioners, power optimizers, voltage regulators, voltage limiting devices, string lengthening devices, and string stretching devices