9 Photovoltaic solar panels for the production of electricity; solar arrays, namely, photovoltaic solar modules for production of electricity; solar energy systems comprising photovoltaic solar panels for the production of electricity; electronic tracking controllers for controlling photovoltaic solar panels for the production of electricity and electronic mechanisms in the nature of closed-loop controller for orienting solar panels; Photovoltaic solar modules for production of electricity; Solar cells; Solar panels for the production of electricity; Apparatus for converting electronic radiation to electrical energy, namely, photovoltaic solar modules; Electric current testing apparatus for use in the photovoltaic industry, namely, pulse generators; Apparatus for measuring and testing the performance and efficiency of photovoltaic power plant equipment elements; Calibrated photovoltaic reference cells; Inverters for electricity; Accumulators in the nature of batteries; Solar batteries; Battery chargers; Protective cover glass for solar modules