9 apparatus and instruments for conducting, switching, transforming, accumulating, regulating and controlling electricity namely, high-frequency switching power supplies; measuring; signaling and checking instruments for sanitary, heating and air-conditioning apparatus and installations namely, digital thermostats; solar thermal modules and/or photovoltaic modules for generating electricity; monitoring devices for photovoltaic installations, namely, energy meters for tracking and monitoring energy usage; solar regulators; monitoring devices for power inverters namely, energy meters for tracking and monitoring energy usage; data loggers for photovoltaic installations; data loggers for power inverters; electrical and electronic regulators, namely, voltage regulators and electrical and electronic function control devices for solar thermal plants; apparatus and instruments for providing electric current for conducting, transmitting, distributing, transforming, accumulating, regulating or controlling of electric current, namely, electric voltage transformers; electrical switchgear; systems and kits comprising solar cells, photovoltaic cells, photovoltaic wafers, photovoltaic modules, solar modules, solar glass, power inverters, charge regulators, batteries, electrical connection elements, wiring, distributors, for solar energy applications; electronic controls for tracking systems