SINEXCEL's StellaON Achieves TÜV SÜD Certification for German Voltage Networks

On October 23, 2026, SINEXCEL (Stock No. 300693.SZ) proudly announced that its StellaON 1250K/1575K energy conversion systems (PCS) have received the highly sought-after TÜV SÜD certification. This validation confirms that the system adheres to Germany's strict VDE-AR-N standards, specifically 4110, 4120, and 4130, which are essential for medium, high, and extra-high voltage connections.

The TÜV SÜD certification is a crucial acknowledgment for SINEXCEL, enhancing the StellaON system's presence in large-scale energy storage projects that operate within diverse levels of the electrical grid. This approval signifies SINEXCEL's commitment to raising the standards of energy solutions globally, enabling safer and more reliable integration of renewable energy sources into the power grid.

Certification Process Details

The TÜV SÜD organization undertook a comprehensive evaluation of the StellaON systems, assessing their behavior under network faults, their active and reactive power regulation, and their overall responsiveness to frequency changes. Notably, the certification process included testing in accordance with the FGW TR3 standard, along with the validation of simulation models based on TR4, as part of the TR8 certification program. Engineers utilized the validated DIgSILENT PowerFactory models to analyze the performance of the inverters across various operational scenarios.

The VDE-AR-N 4130 standard is particularly crucial for systems connecting to networks operating at voltages of 220 kV and above, focusing on the stability of the broader electrical system. The StellaON 1250K/1575K boasts a remarkable performance capability, achieving 98.5% efficiency at full load and maintaining its nominal power output even in ambient temperatures soaring up to 55°C without any derating. Additionally, it can provide 1.5 times its rated power for periods of up to 60 seconds, showcasing its robustness and versatility in various operational climates.

The variable speed cooling system integrated into StellaON ensures low noise levels, capped at just 65 dB, thereby facilitating flexibility in installation, even in areas where acoustic requirements pose limitations. This certification equips developers and EPC (engineering, procurement, and construction) contractors with the necessary framework to select appropriate energy conversion systems (PCS) and establish technical specifications tailored to specific voltage requirements.

Broader Implications and Future Plans

SINEXCEL is continuing its journey to ensure the StellaON system's adaptation and approval in several additional markets. Besides the EU certification and national confirmations in Germany, Poland, Romania, and other regions, ongoing assessments are in progress in the United States, Spain, Austria, and Chile, with expectations for completion by the close of 2026.

Moreover, there are over 15 StellaON projects underway across Europe, Asia, the Pacific, and Africa, currently in the phases of system integration, supply, or operational deployment. The orders received in the first half of 2026 already surpassed 500 MW, highlighting the growing demand for effective energy storage solutions in global markets.

Recent validations of the PCS have also been achieved in countries facing extreme weather conditions, including Vietnam and Myanmar, further underpinning StellaON's adaptability in island microgrid applications as well.

About SINEXCEL

Founded in 2007, SINEXCEL is at the forefront of innovations related to energy storage solutions, electric vehicle charging systems, and power quality enhancements. With a remarkable installed energy storage capacity of 17 GW and over 200,000 direct current electric vehicle chargers, the company plays a pivotal role in empowering energy independence globally. By collaborating with industry leaders, SINEXCEL continues to champion advancements in energy solutions that foster sustainable energy practices.