Gas sensors for measuring gas concentration; apparatus for measuring battery voltage, electric current and temperature; apparatus for measuring, namely, voltage measuring apparatus; electric current measuring apparatus; revolution indicators for use in measuring voltage; gas alarms; safety valves for gas shut-off; security alarms; fire alarms; gas insulated switchgears; electric gas insulated switchgears; electric relays; high-pressure electric vacuum contactors; high voltage circuit breakers; surge protectors; electric power control panels; electrical reactors; electric power distribution units; switchboards; distribution transformers; transformers; inverters; switchgears; electric circuit interrupters; power supplies; power transformers for amplification; electric power controllers; voltage regulators; electrical components in the nature of electric contactors; low and medium voltage circuit breakers; circuit breakers; inverters used in solar power generation; apparatus for measuring electric energy consumption; apparatus and instruments for diagnosing electrical power installations, namely, apparatus and instruments for checking and testing the functioning of electrical power supplies, electric power control panels, electric power distribution units and transformers; apparatus for measuring, monitoring and analyzing electricity consumption, namely, electricity meters; bus ducts in the nature of electrical ducts; electric cables, wires, conductors and connection fittings therefor; converters; ship to shore communications apparatus, namely, radio transmitters and receivers; remote controls for electric power controllers, transformers, circuit breakers, inverters and electric power distribution machines; communications equipment, namely, wireless communication devices for voice, data or image transmission; computer software for supervisory control and data acquisition (SCADA) systems, namely, computer software for monitoring, gathering, and processing real-time data in connection with the automated operations of electrical power installations and for controlling equipment installed in electrical power installations; computer network operating software; computer software for controlling and monitoring vessels; computer software for controlling and monitoring a ship's general machinery, namely, pumps, compressors, tank levels, ventilation, hydraulic units, cranes, door sensors, fire sensors; computer software for collecting, storing, sharing and transmitting data and information about shipping vessels and about goods being shipped in vessels; computer software platforms for the control, monitoring and alarming of vessel and ship systems via a remote user interface; electronic control systems for machines; network servers; data processing apparatus; digital data information processors; wireless controllers to monitor the functioning of other electronic devices, excluding gaming apparatus; apparatus for recording, transmission or reproduction of information; computers; computer servers; downloadable electronic books in the field of electric power solution, energy solution and marine technology; batteries and battery chargers