News
Published in: Solar, Press Releases
Zhangye, China, April 10, 2026 - A landmark 300 MW / 1,200 MWh standalone energy storage project powered by Sineng Electric is in commercial operation in northwest China. The project marks a significant advancement in facilitating high levels of renewable energy integration while strengthening grid stability, underscoring the strategic role of large-scale energy storage in modern power systems.
Located in Zhangye City, China, an area rich in wind and solar resources, the project directly addresses structural challenges associated with high renewable penetration, including intermittency, grid congestion, and limited transmission capacity. Persistent imbalances between daytime photovoltaic generation surplus and evening peak demand have historically led to renewable energy curtailment. The deployment of utility-scale energy storage provides a critical pathway to mitigate these constraints by enabling temporal energy shifting and enhancing grid flexibility.
The project is equipped with Sineng Electric’s 1,250 kW central PCS, designed to deliver high-efficiency energy conversion and superior system adaptability. With a peak efficiency of 99%, the PCS ensures optimized performance across a wide operating voltage range while minimizing conversion losses. It reduces the number of parallel battery clusters by 50%, effectively increasing system charge and discharge capacity by 0.75% and improving overall lifecycle energy utilization.
Engineered for deployment in harsh environments, the PCS is equipped with an IP65 protection rating to withstand sand and dust conditions in the Gobi Desert. In addition, the solution offers millisecond-level dynamic response capability, enabling rapid and precise support for grid ancillary services, including frequency regulation and power balancing.
As a four-hour long-duration energy storage system, the project can store up to 1.2 million kWh of renewable electricity per charge-discharge cycle. On an annual basis, it is expected to reduce curtailed wind and solar generation by more than 79 million kWh, thereby significantly enhancing renewable energy utilization and grid absorption capacity in Gansu Province.
Following commissioning, the project will play a critical role in peak shaving, load shifting, frequency regulation, and renewable output smoothing, contributing to improved grid reliability and operational efficiency. This project demonstrates Sineng Electric’s continued commitment to advancing high-performance energy storage technologies and supporting the global transition toward a low-carbon energy system. As the power sector evolves toward greater decarbonization, grid-scale energy storage will remain a cornerstone in enabling a flexible, resilient, and sustainable energy future.
About Sineng
Sineng Electric is a world-leading supplier of a comprehensive product portfolio, including PV inverters, PCS, hydrogen production power supply systems, and power quality products. By establishing four R&D centers and leveraging top-notch resources, Sineng's unwavering commitment to technological innovation has enabled more people to access cost-effective, reliable, and sustainable energy. Known for engineering excellence, rigorous testing standards, and consistent quality, Sineng has been recognized as a BloombergNEF Tier 1 power inverter manufacturer (covering both PV inverters and PCS). The company ranked No. 4 globally in PV inverter shipments for two consecutive years (2023 and 2024), and No. 5 globally in energy storage PCS shipments in 2024.
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