Photovoltaic curtailment, grid fluctuations, power rationing... These energy issues that once troubled enterprises are now being quietly resolved by a series of emerging energy storage systems.
At three o'clock in the morning, a sudden drop in the power grid load caused voltage fluctuations in an industrial park, and the production line equipment was about to shut down. At this critical moment, the energy storage system configured in the park was instantly activated, switching to off-grid mode in milliseconds, ensuring the continuous operation of the production line.
This is not a science fiction scene, but a realistic portrayal of the current application of energy storage technology in the industrial and commercial sectors. In the corners of factory parks, energy storage systems the size of shipping containers are quietly operating; they charge during the day and discharge at night, becoming an indispensable "golden power source" for enterprises.
Energy Storage Rise: The "Emergency Guardian" of Industry and Commerce
As the proportion of new energy rapidly increases, the volatility and uncertainty of the power grid have significantly risen, and the frequent occurrence of extreme weather events poses severe challenges to the resilience of the power system.
Energy storage, a technology that was once overlooked, is quietly becoming the stable cornerstone of industrial and commercial power systems.
From responding to sudden power outages to smoothing out grid fluctuations, from utilizing time-of-use electricity prices to enhancing the consumption of green electricity, energy storage systems are flexibly switching between multiple roles, providing enterprises with continuous and stable power assurance.
Real Dilemma: The Pain of Electricity Usage for Enterprises
As a major economic province and a large energy-consuming province, Jiangsu's maximum electricity load has exceeded 156 million kilowatts. At the same time, with over 100 million kilowatts of new energy connected to the grid, the electricity pressure is low during the day when photovoltaic generation is high, while it rises sharply in the evening when photovoltaic generation drops suddenly.
"This steep rise and fall in load characteristics poses a huge challenge to the safe operation of the power grid," said Qiu Chengguang, Director of the Dispatching Operation Department of the Dispatch Control Center of State Grid Jiangsu Electric Power Company.
For the vast majority of industrial and commercial enterprises, this challenge is even more specific and acute.
Photovoltaic curtailment leads to energy waste. Taking Shandong Huaqin Group as an example, although rooftop photovoltaics have been installed, the inability to fully utilize them has resulted in a waste of resources.
Electricity expenses remain high. In the face of the widening gap between peak and off-peak electricity prices, how enterprises can effectively reduce electricity costs has become a key factor in enhancing competitiveness.
The reliability of power supply is facing challenges. Whether it is power outages caused by extreme weather or voltage instability due to fluctuations in grid load, they constantly threaten the normal production of enterprises.
Case Analysis: The Multidimensional Value of Energy Storage and Global Practices
Domestic Applications: From Peak Shaving to Energy Security
- Case 1: Solve the issue of abandoned light and increase revenue
The largest industrial and commercial energy storage project in Shandong Province — the Huqin Green Energy 30MW/60MWh energy storage project has successfully been connected to the grid in Yanzhou District.
The total investment of this project is 100 million yuan, utilizing the complete set of CATL energy storage systems, effectively addressing the issue of energy waste caused by the abandonment of rooftop photovoltaic power by enterprises. After the project is connected to the grid, it can enhance the photovoltaic consumption capacity by approximately 21.9 million kilowatt-hours each year, and through the scientific utilization of the peak and valley electricity price difference, it can reduce the enterprise's electricity expenses by about 6.68 million yuan annually.
- Case 2: Hybrid Energy Storage, Complementary Advantages
The first "2.5MW/8.359MWh lithium iron phosphate + 0.5MW/2MWh all-vanadium flow" hybrid energy storage project demonstration station in Henan Province has officially commenced commercial operation.
The project innovatively adopts a dual technology route, achieving complementary advantages: lithium batteries are responsible for short-term high-frequency charging and discharging, while vanadium flow batteries take on long-term deep charging and discharging. Through the smart energy management system, it is expected to save over 2.6 million yuan in electricity costs for the park annually, with an investment payback period of less than 5 years.
Model Example: Chinese Technology Illuminates Global Energy Transition
- Case 3: Hubei "Super Power Bank" Sold to Europe
In October 2025, 204 battery prefabricated cabins marked with the "CORNEX" logo departed from the Yichang Chuneng New Energy production base, heading to Bulgaria, forming a "super power bank" with a total capacity of 1020MWh. This batch of products perfectly matches the renewable energy scenario needs in Bulgaria and will serve the country's "National Renewable Energy Power Storage Infrastructure" project, helping to increase the share of wind and solar energy in its power structure and ensuring the stability of the national power system.
The project took only 4 months from order to delivery, showcasing the capabilities and commitment of Chinese manufacturing. The product's cycle life exceeds 12,000 times, with a 40% increase in energy density compared to traditional solutions, and it has passed 62 rigorous safety tests, obtaining the authoritative certification required by the European Union.
- Case 4: Dongfang Electric Advances into the High-end Market in the Middle East
In September 2025, Dongfang Electric Corporation signed an EPC general contracting contract for a grid-side energy storage project in Abu Dhabi, UAE, with a total capacity of nearly 1 gigawatt-hour (GWh).
This is not only the largest grid-side energy storage project in the UAE, but also the largest energy storage project undertaken by Dongfang Electric in overseas markets, marking the official entry of the Chinese power equipment giant into the UAE market. Once completed, this project will significantly enhance the peak shaving and frequency regulation capabilities of the Abu Dhabi grid, supporting the large-scale integration of renewable energy.
- Case 5: China Electric Power Construction Participates in the World's Largest Integrated Solar and Storage Project
In Abu Dhabi, UAE, the world's largest integrated solar and storage project, built with the participation of Chinese enterprises, has been launched in October 2025. This giant project has an installed capacity of up to 5.2 gigawatts and is equipped with a total battery storage capacity of 19 gigawatt-hours.
Among them, China Electric Power Construction is responsible for the construction of the northern block of the project, which includes 2.1 gigawatts of photovoltaic and 7.6 gigawatt-hours of energy storage. The project is expected to be put into operation in 2027, reducing carbon dioxide emissions by approximately 5.7 million tons per year, and achieving stable output of clean energy through advanced artificial intelligence prediction systems and virtual power plant technology.
Technical Breakthrough: Intelligent Upgrade of Energy Storage Systems
With the continuous advancement of technology, energy storage systems have evolved from simple electrical energy storage devices to intelligent energy management centers.
Hybrid energy storage technology: By combining different energy storage technologies, each can leverage its own advantages. For example, in the Henan hybrid energy storage project, all-vanadium redox flow batteries possess intrinsic safety, are non-flammable and non-explosive, support 100% deep charge and discharge, have a cycle life of over 20,000 times, and exhibit zero capacity degradation, making them suitable for long-duration deep charge and discharge scenarios.
Smart Energy Management System (EMS): For example, Huiming Qian EMS serves as the "smart brain" for hybrid energy storage, achieving millisecond-level PQ control + minute-level SOC balancing + hour-level electricity price forecasting, with multiple algorithms running in parallel. Adaptive switching between "lithium battery high frequency + vanadium flow deep discharge" mode significantly enhances battery utilization.
Grid-forming energy storage technology: The Sichuan Company of State Power Investment Corporation's "Photovoltaic + Grid-forming Energy Storage" new energy project in Seda has completed the first county-level black start test in Sichuan Province. During the isolated grid period in Seda, this project continuously provided safe, stable, and reliable clean energy to key power supply locations such as the Seda County passenger station and hospital.
International Perspective: Insights into Global Energy Storage Applications
The application of energy storage technology has become a global consensus, and overseas markets are also accelerating their布局.
In Australia, Wärtsilä is constructing the country's largest DC-coupled hybrid battery system. This project reflects the trend of combining hybrid energy storage assets with locally generated renewable energy.
The project adopts DC-coupled technology, which directly couples solar power generation with battery storage, minimizing energy loss to the greatest extent, capturing solar energy that would otherwise be limited, and significantly improving the project's economic viability and system efficiency.
In the United States, Ameresco has launched the largest utility-scale battery storage system on the customer side deployed in Arizona. This is a 50MW/200MWh battery storage system built for Nucor Corporation, a leading steel producer in North America.
At the same time, Alliant Energy has begun operating the largest battery storage system in Wisconsin to date—a 100MW/400MWh battery storage system.
Walking into the Huqin Group's park, the 30MW/60MWh energy storage project is quietly operating. It is like a huge "power bank," charging during low electricity cost periods and discharging during high electricity cost periods, saving the company 6.68 million yuan in electricity costs each year.
In Jiangsu, a regional energy storage peak regulation system that integrates various forms of energy storage peak regulation technologies, including centralized calling of new energy storage, scientific allocation of pumped storage, and backup for electric vehicle grid connection, is playing the role of a "time-space regulator" for the power grid.
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