（1）Access to new energy to ensure safety
First of all, renewable energy such as wind energy, solar energy, and ocean energy are affected by seasons, weather and geographical conditions, and have inconspicuous discontinuity and instability. Large-scale energy storage technology can stitch together unstable renewable energy. , into a reliable and stable energy supply. Secondly, energy storage technology is also the strong backing of smart grid construction. It can not only improve the compatibility of smart grid with renewable energy generation, but also realize the two-way interaction of smart grid energy.
（2）Reasonable control, greatly reducing costs
The energy storage system is also an essential technology for future office buildings and homes. In office buildings, it can cut peaks and fill valleys, store cheap off-peak electricity at night, and supply power during peak hours during the day, greatly reducing electricity costs. Especially now that the trend of electricity marketization is becoming more and more obvious, the construction of energy storage power stations has more advantages.
（3）Guarantee production and living electricity
The city has a power outage, but the office building still has electricity. This is another function of the energy storage system in the office building, backup power and emergency power. Another function is to alleviate the demand for capacity increase brought about by the charging of electric vehicles. The current new energy vehicles are emerging electric tigers, which consume a lot of power. Electric vehicle charging will further expand the fluctuation of electricity consumption, which requires an increase in capacity, and the energy storage system can use the stored valley electricity to fill the demand for capacity increase, ensuring the stability and safety of building electricity consumption . The energy storage system can also be applied in the home, where there are factory buildings in rural areas or in remote mountainous areas where the large power grid cannot reach. In these places, the energy storage power station can be used with new energy to meet the electricity demand of residents. The general residents have limited demand for power supply from the large power grid, and more are the construction of charging piles in the community and the use of street lamps and other facilities.