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The Yuneng Magic Cube 520 kW liquid-cooled string‑type PCS has obtained CE certification and is now officially available for sale.
Published:2026-05-20
On May 20, 2026, the 520 kW grid‑forming liquid‑cooled string‑type energy storage converter (PCS), independently developed by Yuneng Magic Cube (CECB), successfully completed all certification tests conducted by TÜV SÜD, a globally recognized testing and certification body, thereby obtaining market access approval and officially going on sale effective immediately.
As a globally trusted third-party testing and certification body, TÜV SÜD conducted comprehensive and rigorous testing on this product. The product demonstrated outstanding performance across key metrics—including safety, reliability, and electromagnetic compatibility—fully meeting international standards. As the industry’s highest‑power grid‑forming liquid‑cooled string‑type PCS, this product is poised to elevate energy storage system solutions to new heights of innovation.
As the “energy conversion hub” of energy storage systems, this PCS leverages multi‑dimensional core advantages to precisely meet the real‑world needs of medium‑ and large‑scale projects worldwide, serving as a critical enabler for cost reduction, efficiency gains, and enhanced O&M performance. The product is broadly compatible with the full range of high‑capacity battery cells—500+, 600+, 700+, and 1100+ Ah—and supports 2‑hour, 3‑hour, 4‑hour, 6‑hour, and 8‑hour system configurations using 314 Ah, 392 Ah, 587 Ah, 628 Ah, and 1175 Ah cells. It also accommodates large‑capacity AC/DC integrated storage units at 5 MWh, 6.25 MWh, and 10 MWh. Featuring an integrated three‑in‑one design that combines the PCS, PDU, and BCU, it significantly simplifies overall system engineering and effectively reduces project costs. The product supports parallel operation of up to 20 units, facilitating seamless system scaling, while its installation and maintenance are straightforward, with fault‑diagnosis and repair times kept within 30 minutes.
In terms of performance, this product features an integrated liquid‑cooling circulation and thermal management system that boosts heat dissipation efficiency by 50%. It operates with noise levels below 65 dB across the full power range, boasts an IP65 protection rating, and is designed to meet C4/C5 corrosion‑resistance standards, ensuring stable operation and full‑power output even in harsh environments characterized by high temperature, high humidity, and salt spray. Its wide input voltage range delivers a maximum conversion efficiency exceeding 99%, while offering grid‑friendly characteristics, low switching losses, and reduced harmonic distortion. The unit supports advanced functions such as AGC/AVC, VSG, primary frequency regulation, black start, on/off‑grid switching, and grid‑forming capabilities. Additionally, it is equipped with a high‑speed real‑time Ethernet interface, enabling highly synchronized multi‑unit parallel control and significantly enhancing the system’s primary frequency response.
The 520 kW grid‑forming liquid‑cooled string‑type PCS has now completed certification and is officially available for sale, underscoring Yuneng Magic Cube’s robust capabilities in R&D, manufacturing, and quality control within the energy storage inverter sector, while also marking a significant milestone in its efforts to expand into the global medium‑ and large‑scale energy storage market.
Yuneng Magic Cube will seize this opportunity, leveraging its internationally recognized certifications to aggressively expand into the global solar‑storage microgrid and frequency‑regulation energy storage markets. By keeping technological innovation at the core, it will deliver more competitive energy storage equipment and solutions, injecting fresh momentum into the global transition toward a greener energy mix.
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