Energy storage: can be understood as the storage and use of energy. There are many forms of energy storage, but here I am mainly talking about energy storage in electricity (battery type energy storage)

Home energy storage devices, when connected to a server via the internet, can theoretically be ordered to provide very short-term services to the energy grid:

Photovoltaic energy storage batteries are indispensable components of solar photovoltaic power generation systems for storing electrical energy. Their main function is to store the electrical energy of the photovoltaic power generation

Solar home energy storage for home users to store electricity locally for later use. In layman's terms, home energy storage systems are mainly used to store electricity generated by solar panels by putting it into batteries for easy access at any time in the home.