radio monitor for sound and signal reproduction; network communication equipment; electrical or electronic surveillance camera system; security monitoring robot; audio monitors; photovoltaic inverters; photovoltaic devices and equipment for solar power generation; photovoltaic cells; voltage regulator; frequency stabilizers; electric inverters; electrical inverters; electricity inverters; monitors; monitors for use with computers; monitors (computer hardware); monitors (computer programs); battery charge monitors; battery charging apparatus for vehicles; electric safety cut-out fuses; electrical cut-outs; electrical safety cut-out fuses; apparatus for managing energy supplies; devices for measuring energy; electrical apparatus (other than generators) for use in energy supply; energy control devices; solar energy collectors for electricity generation; solar energy operating apparatus