9 Photovoltaic cells and modules and installations constructed principally therefrom, namely, photovoltaic systems that convert sunlight into electric and thermal energy; Photovoltaic solar modules for production of electricity; Inverters and electrical charge regulators for use in photovoltaic plants; Electric solar cells and installations constructed principally therefrom, namely, photovoltaic installation apparatus, namely, solar modules for production of electricity; Solar batteries for use with solar cells; Photovoltaic apparatus and solar system installations for generating solar electricity; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electric current; Recorded and downloadable software for planning and configurating photovoltaic installations; Software applications for planning and configurating photovoltaic installations