Policy support plays a pivotal role in fostering the development of physical energy storage batteries, which encompass technologies like pumped - hydro storage, compressed - air energy storage, and flywheel energy storage. Governments worldwide have recognized the strategic importance of these storage systems in enhancing grid stability, integrating renewable energy, and ensuring energy security.

　　One of the primary policy measures is financial incentives. Governments often provide subsidies, tax credits, and grants to encourage investment in physical energy storage projects. For instance, subsidies can significantly reduce the initial capital costs for constructing pumped - hydro storage plants, making them more economically viable. Tax credits may also be offered to companies involved in research, development, and manufacturing of physical energy storage technologies, thereby promoting innovation and technological advancement.

　　Regulatory policies are equally crucial. Governments establish feed - in tariffs and energy storage mandates. Feed - in tariffs guarantee a fixed payment for the electricity stored and fed back into the grid by physical energy storage systems, providing a stable revenue stream for operators. Energy storage mandates require power grid operators or power - generating companies to incorporate a certain proportion of energy storage capacity into their systems, creating a market demand for physical energy storage solutions.

　　In addition, governments support physical energy storage through infrastructure development policies. They invest in building the necessary transmission and distribution networks to connect energy storage facilities to the grid. This not only improves the efficiency of energy transfer but also enables the large - scale deployment of physical energy storage systems across different regions. Moreover, international cooperation policies are emerging, where countries collaborate on research, share best practices, and jointly develop cross - border energy storage projects, further accelerating the growth of the physical energy storage industry.

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