Renewable energy supply system, floating offshore solar power generating plant, and renewable energy supply method

A carbon-free energy supply system, comprising:

• one or more power generation plants that generate power to meet energy demand of an entire globe or country or a certain region or a specific industry using renewable energy resources, including one or more floating offshore photovoltaic power generation plants installed in equatorial waters within approximately 30 degrees north-south latitude, the waters being vast and abundant in renewable energy resources;
• one or more energy carrier systems that synthesize energy carriers from power generated at the one or more power generation plants, that store the one or more energy carrier systems up to a specified amount, that convert the power or the energy carrier into an energy form suitable for each of supply destination facilities, and that supply carbon-free energy to the supply destination facilities via energy transport means comprising one or more of predetermined pipeline transportation, tank truck transportation, tanker transportation, DC power transmission, and AC power transmission;
• one or more management and control devices that manage and control some or all of the one or more power generation plants, the energy carrier system, the energy transport means, and the supply destination facilities;
• each floating offshore photovoltaic power generation plant comprising:
• a plurality of panel housings having spaces into which water can be poured into and drained from;
• a close-contact automatic coupler that mechanically couples the plurality of panel housings to each other;
• a floater that is wound onto a rope winding machine in the close-contact automatic coupler via a rope;
• wherein, each floating offshore photovoltaic power generation plant is maintained at a predetermined diving depth below a surface of the waters, by the panel housings into which a certain amount of water has been poured and the floater which has floated to the surface of the waters after a lock on the rope winding device has been released.