SINEXCEL Power Systems Gain German Grid Certification
The certification allows the firm to deploy its high-efficiency StellaON converters into German utility-scale storage projects.
Updated on Oct. 22, 2026 in Energy
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SINEXCEL has received TÜV SÜD certification for its StellaON 1250K/1575K power conversion systems, authorizing their use in German utility-scale battery storage projects. This official validation confirms the systems meet key German technical standards for grid reliability and performance.
Why it matters
Securing these certifications allows the company to deploy its energy storage hardware across the German grid, expanding the reach of its power conversion technology into major European markets. This development signals a continued scaling of SINEXCEL, which reported over 500 MW in orders during the first half of 2026.
The StellaON 1250K/1575K systems achieve 98.5% efficiency at full load and maintain rated output in ambient temperatures as high as 55°C. The hardware is also capable of delivering 1.5 times its rated power for up to 60 seconds.
The players
SINEXCEL
A manufacturer specializing in power electronics, energy storage converters, and grid-tied power solutions.
TÜV SÜD
An international testing and certification organization that verifies the safety, compliance, and performance of technical equipment.
The details
TÜV SÜD tested the converters by simulating grid faults, power control capabilities, and frequency responses. The certification process integrated FGW TR3 testing with TR4 simulation model validation, following the requirements of the TR8 programme. These protocols ensure the equipment responds safely and predictably to disturbances in the electrical grid.
Timeline
Orders for StellaON exceeded 500 MW in the first half of 2026.
StellaON secured TÜV SÜD certification for German grids on October 22, 2026.
Certifications for the United States, Spain, Austria, and Chile are planned for completion by the end of 2026.
The Tech Race
The certification marks a milestone for SINEXCEL as it competes to supply power conversion infrastructure to European utility-scale storage projects. It follows recent approvals in Poland and Romania, positioning the firm to expand against established regional power electronics incumbents.
Utility operators and renewable energy project developers in Germany gain access to a new hardware option for grid-scale battery systems. These units are already shipping to global markets, with SINEXCEL intending to expand certification coverage to North American and additional European markets by the end of 2026.
The takeaway
SINEXCEL is rapidly clearing the regulatory hurdles required to scale its power conversion technology across the European energy grid. Readers should watch for the company's progress on its planned 2026 certifications for the United States and Spain to gauge its global growth trajectory.
Further reading
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