Sungrow has completed the world’s first large‑scale grid‑forming validation at a time when renewable‑heavy power systems urgently need stronger grid stability.
The company, a major provider of PV inverters and energy storage systems, carried out 14 scenarios over 138 hours, meeting international standards. TÜV Rheinland independently verified the results.
Henry Liu, General Manager of the Microgrid and Grid Solutions Center at Sungrow, said: “Based on two decades of experience on grid-forming technology and in-depth understanding of power system stability requirements, Sungrow has built a 30 MW large scale simulation platform and conducted 14 comprehensive real-world extreme test scenarios.” He added that the results confirm robust grid‑forming capability and support wider deployment.
Alongside this milestone, Sungrow has become the first company worldwide to complete Notified Body assessment under the EU Battery Regulation (EU 2023/1542) across utility‑scale, C&I, and residential ESS products.
Validated performance across critical grid scenarios
Sungrow’s 30 MW simulation platform, real short‑circuit capacity regulation equipment, and advanced arc‑fault testing tools enabled replication of demanding grid conditions aligned with requirements in Europe, Australia, and China. Key outcomes include:
- Short‑circuit performance: Using real arc‑fault equipment, the grid‑forming system stayed connected and delivered continuous fault current where conventional systems would typically disconnect. The test showed stable contribution and strong fault ride‑through.
- Inertial response: The system maintained operation under sudden disturbances, restoring frequency stability within milliseconds and improving resilience in weak grids.
- Black start capability: In a full blackout, Sungrow’s grid‑forming Power Conversion System established system voltage in 19 seconds and restarted the entire site without external support, enabling rapid large‑scale recovery.
A further 11 tests, including on/off‑grid switching, load switching, and oscillation damping, were also completed successfully.
Full ESS portfolio passes EU Battery Regulation assessment
TÜV Rheinland confirmed Sungrow as the first company to complete NB assessment across all stationary ESS segments under the current EU Battery Regulation. The assessment covered safety, labelling, hazardous substance restrictions, performance, durability, and battery‑management parameters such as SOH and expected lifetime.
Bowen Dong, General Manager of PV&ES Product Services at TÜV Rheinland Greater China, said: “Sungrow’s energy storage portfolio demonstrates strong performance in safety design, system reliability, and key technical metrics, fully meeting the stringent requirements of the EU Battery Regulation for stationary energy storage systems.”
This achievement provides a benchmark for the industry as Europe’s regulatory landscape continues to evolve.
