The battery energy storage system can help balance any power grid and improve the quality of power supply from the grid. This shows that battery energy storage systems have more and more opportunities to participate in the electricity market on a global scale.

　　Almost all countries are working hard to transform their power market structure, striving to open up a place for battery energy storage systems, so that battery energy storage systems can provide auxiliary services such as increasing grid capacity, frequency regulation, and voltage control.

　　Taking Germany's main control reserve (PCR) market as an example, PCR began to attach importance to battery energy storage systems in 2016. Because since 2016, the cost of battery energy storage systems has been declining, and a viable return on investment can be obtained.

　　Unlike traditional power plants, battery energy storage can react to system imbalances almost instantaneously, and can be fully activated in less than 30 seconds. However, unlike the United States, Germany does not provide compensation for this rapid response.

　　The popularity of battery energy storage systems in the U.S. power market is largely due to Federal Energy Regulatory Commission (FERC) orders issued in 2011 and 2013, No. 755 and No. 784.

　　The order stipulates that the response speed and accuracy of response in the auxiliary service market shall be rewarded. As battery energy storage system suppliers are invited to participate in the grid frequency regulation competition, traditional grid operators have encountered unprecedented challenges.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　Decision makers around the world are taking actions to reward the contribution of battery energy storage systems, which will become more and more important in the electricity market.