Thermostats; Accumulator boxes; Accumulator jars; Accumulators, electric; Couplings, electric; Electric control panels; Electrical connectors; Pressure sensors; Switches, electric; Temperature indicators; Electric accumulators; Electric contacts; Electric plugs; Electric sockets; Electrical plugs; Electrical plugs and sockets; Electronic chips for the manufacture of integrated circuits; Photovoltaic cells also including a solar thermal collector sold as a unit