Renewable energy generation system

A renewable energy storage apparatus that floats in the sea and is connected to a renewable energy power generator that produces power by converting wave energy into electrical energy, the renewable energy storage apparatus comprising:

• a housing configured to be connected to the renewable energy power generator using a cable;
• a turbine configured to convert a horizontal motion of sea currents into rotational motion for tidal power generation and including a motor configured to produce electrical energy by converting the rotational motion of the turbine and to function as a propulsion motor for propelling the renewable energy storage apparatus,
• wherein, the housing includes a first adaptive coupling portion formed on an upper surface of the housing, and a second adaptive coupling portion formed on the upper surface of the housing,
• wherein a battery configured to store the electrical energy is moved to be coupled to or separated from the first adaptive coupling portion by a transportation,
• wherein the transportation is moved to be coupled to or separated from the second adaptive coupling portion, the transportation being capable of coupling to the second adaptive coupling portion,
• wherein the renewable energy power generator is connected to the housing through a cable, and
• wherein the renewable energy storage apparatus is configured to receive and store electrical energy from the renewable energy power generator and subsequently charge and transfer the electrical energy to both the battery and the transportation.