On December 21, 2025, the official announcement of the successful bidder candidates for the EPC general contract of the 600MW/1200MWh Independent Shared Energy Storage Power Station project in Mianchi County, Sanmenxia City, Henan Province was released. China Construction Third Engineering Bureau Second Construction Engineering Co., Ltd. emerged as the frontrunner, distinguished by its robust comprehensive strength and precise technical proposal, securing the position of primary preferred bidder with a total bid offer of 1.477 billion yuan.
Key project details have been confirmed: the project is the EPC general contract for the 600MW/1200MWh Independent Shared Energy Storage Power Station in Mianchi County. It boasts a construction scale of 600 megawatts/1200 megawatt-hours, ranking it among China's first batch of single large-scale energy storage power stations to reach the gigawatt-hour level. The investment amount is approximately 1.477 billion yuan. A critical milestone has been reached with the official release of the EPC general contract successful bidder candidate announcement, marking one of the most significant steps from planning to substantive construction.
What does the "successful bidder candidate announcement" signify? It indicates that the tender process for the EPC general contract, encompassing design, procurement, and construction, has completed the bid opening and evaluation stages. The outcome is pending finalization, as the bid evaluation committee has recommended the top-ranked candidates. The top-ranked candidate is the primary preferred bidder. During the legally mandated publicity period, which is typically three days, other bidders or interested parties can raise objections or complaints, ensuring fairness and transparency in the process. Construction is imminent; barring any valid objections after the publicity period, the tendering party will issue the "Letter of Acceptance" to the primary candidate, followed by contract signing, initiating the full-scale construction phase.
The project's importance and context are underscored by its "Independent Shared Energy Storage" model. This station is not attached to a specific power plant but operates as an independent entity on the grid side, providing various services like peak shaving, frequency regulation, and backup power to the entire system through market mechanisms to generate revenue. This model represents a mainstream direction for China's energy storage industry development. As a key facility for Henan's energy transition, this large-scale storage station is crucial for mitigating the intermittency and volatility of wind and solar power, enhancing grid security and stability, and promoting the integration of clean energy in Henan, a major renewable energy province. As an industry benchmark project, its 600MW/1200MWh scale places it at a leading level domestically, and its construction and operational experience will provide vital reference for subsequent similar projects.