China's new energy storage scale jumps to the top in the world, 'power bank' helps with energy transformation

1. Peak shaving and valley filling to ensure stable power supply
   • Xizang Shannan Optical Storage Power Station stores photovoltaic power during the day, and releases power at night peak to avoid power waste [1].
   • Hainan Prefecture in Qinghai Province has built the world's highest and largest high-voltage direct mounted energy storage project (150000 kW/600000 kWh), with a single unit capacity of 25000 kW/100000 kWh, a response time of 10 milliseconds, and a system efficiency improvement of 4% -6%.
   • The independent energy storage power station in Changxing County has a single storage capacity of 200000 kilowatt hours, which can meet the daily electricity demand of 30000 households.
2. Cracking the Difficulty of New Energy Fluctuations
   The energy storage system solves the problem of unstable output in wind and solar power generation due to extreme heat without wind and late peak without light through "valley charging and peak discharging", becoming the "dispatch station" and "super power bank" of the new power system.

• policy support：
  The first government work report on the development of new energy storage in 2025; Policies such as the Energy Law and the Action Plan for Accelerating the Construction of a New Power System clarify the function of energy storage regulation and improve the electricity market mechanism.
• technological innovation：
  • Ecological formation of hierarchical developmentIn 2024, the National Energy Administration released 56 new energy storage pilot projects, covering more than ten technological routes such as lithium-ion batteries and molten salt thermal storage.
  • Engineering breakthroughAnhui Suzhou has put into operation the largest "coal-fired molten salt" energy storage project in the country, utilizing molten salt storage to achieve "idle heat storage and busy heat supply", enhancing the flexibility of coal-fired power units in peak shaving.
  • Complete standard systemBy 2024, over 20 electrochemical energy storage standards will be released, covering the entire process from planning and design to grid integration.

1. Significant effect of peak shaving and supply guarantee
   During the peak period of summer electricity consumption in 2025, the real-time maximum discharge power of the new energy storage in the State Grid operating area reached 44.53 gigawatts, an increase of 55.7% compared to the peak in 2024. The peak capacity is equivalent to nearly three Three Gorges hydropower stations, supporting an average of 2.4 hours of power supply during the evening peak period.
2. The market-oriented mechanism is gradually improving
   • The Basic Rules for the Operation of the Electricity Market establish energy storage as a new type of business entity.
   • Jiangsu implements the "peak subsidy auxiliary service model for electricity price difference"; Gansu Province implements independent energy storage bidding compensation; In 2024, the energy storage trading volume in the State Grid operating zone increased by 2.7 times year-on-year.
   • The economic viability of industrial and commercial scenarios is highlightedFor example, Jiangsu enterprises utilize the peak valley electricity price difference (0.28 yuan/kWh during low periods and 1.15 yuan/kWh during high periods), resulting in an annual provincial electricity bill exceeding 500000 yuan.
3. Challenge and direction
   The uneven development of regional markets and limited returns on non spot market regional energy storage. In the future, we will improve the pricing mechanism, promote alternative energy storage in the distribution network, and expand its application scenarios.

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