Energy comes in various structures including radiation, compound, gravitational potential, electrical potential, power, raised temperature, dormant warmth and dynamic. For example, we can’t generate the solar while the sun is not shining or we can’t generate wind while the wind isn't blowing. It becomes important to save the energy that produce at one time and use at a later time. Power-to-gas, Storing wind and sun in natural gas and Redox Flow Batteries are some of the smart ways to store the energy. Some traditional methods to store the energy like: Mechanical storage systems, electrochemical storage systems, Chemical energy storage, Electrical storage systems, Thermal storage systems, Superconducting Magnetic Energy Storage and Methane.