**1. Introduction**

A strong deployment of flexibility solutions for energy storage is necessary to provide the system with the capacity to adapt the dynamics of the load from the frequency response to interannual flexibility. The main candidate for such solutions to offer flexibility networks, response to demand, and dispatchable and flexible energy production is energy storage.

There are five major subsystems in energy power systems, namely, generation, transmission, substations, distribution, and final consumers, where energy storage can help balance client demand as well as the generation itself.

Energy storage is a making a lot of possibilities for technology for various applications, such as power top shaving, renewable energy utilization, boosted structure energy systems, and advanced transporting within multiple areas. Important elements regarding application of energy storage necessary to explain in the introduction are:


In the process of productive use of energy storage, a balance needs to be struck between implementing frameworks that facilitate cost monitoring and establishing a secure climate for investment in the field.

Energy storage is also one of the leading forces in the implementation of renewable energies and plays a key role in sustaining a strong and efficient modern electricity grid, with minimizing the power volatility, increasing the reliability of the electrical grid, and allowing the storage and delivery of electricity produced by intermittent renewable energy sources.

In terms of how to ensure transparency and predictability for market participants, we have learned that adaptation policies that incorporate cost-tracking capabilities of technology are the perfect way to do this.

To reduce costs, which is one of the most contentious topics relating to storage, one of the most successful approaches was to tightly track costs as the share of the use of renewables and energy mix in general expanded.

If renewable energy prices continue to fall and grid parity is reached in various countries, a new period of policies will be required to ensure further growth of renewables in the energy mix.
