The updated VDE-AR-N 4105:2026 standard, issued by the Association for Electrical, Electronic & Information Technologies (VDE), took effect officially on March 1, 2026. Within less than three weeks of its implementation, Sungrow successfully completed all required tests and obtained certification, demonstrating its strong technical readiness and execution capabilities.
As a key requirement for grid connection in Germany, the VDE-AR-N 4105 is recognized for its stringent technical criteria and its significant influence on the European residential energy market. Compared to the previous version, the updated standard extends its applicable power range and introduces more stringent technical requirements, particularly for inverter operation under increasingly complex grid conditions.
During the certification process, TÜV Rheinland conducted comprehensive testing on the SHT series inverter. The product successfully met all requirements in key areas, including:
l PAV, E monitoring (feed-in limitation)
l Reactive power supply
l Network and system protection
According to Sungrow’s technical team, the SHT series had already incorporated most of the new standard’s requirements before its official release, with only minor adjustments needed for specific parameters. As a result, the certification process primarily validated existing capabilities rather than requiring substantial redesign, highlighting the company’s forward-looking R&D approach.
With the rapid growth of distributed energy resources across Europe and globally, grid systems are facing increasing pressure and operational complexity. The evolution places higher demands on inverters in terms of power regulation, dynamic response, and grid support. Drawing on foresight into these trends, Sungrow set elevated performance targets during the SHT series design phase, enabling swift certification under the new standard and achieving a first-mover advantage.
From an industry perspective, achieving certification at an early stage not only confirms the product’s readiness for the updated requirements but also provides a practical reference for the implementation of the new standard.
Dr. Philip Yu, Principal Engineer of Sungrow Residential BU, stated: “To date, our SHT hybrid inverter series has achieved over 1 GW of cumulative global shipments, serving nearly 80,000 households and businesses across Europe, Asia, and other markets worldwide. Sungrow will continue to advance technological innovation in grid integration and elevate product capabilities with higher standards, to meet increasingly stringent grid requirements, enabling more reliable and resilient energy systems.”
