Crystalline silicon solar cells; Electrical cells and batteries; Microcrystalline silicon photovoltaic cells; Photovoltaic cells; Photovoltaic installation apparatus, namely, solar modules for production of electricity, solar thermal and electric receivers, tracking mechanisms and concentrating optics, and control algorithms; Photovoltaic solar panels for the production of electricity; Silicon wafers; Solar cells; Solar panels for the production of electricity; Solar wafers