Fronius grid switch box

The grid changeover box serves as a central component for backup power applications in combination with Fronius VertoPlus inverters. It enables automatic grid disconnection and ensures stable backup operation via suitable TN‑C, TN‑S, and TT earthing systems. Integrated protection and switching components, as well as an embedded smart meter, enhance monitoring and support precise load management. The unit is designed for indoor wall mounting and includes all required cable glands. It therefore provides a practical addition for systems that require a defined and robust emergency power changeover.

• TechnologyThe changeover box combines switching technology, measurement, and protection functions in a compact enclosure. All‑pole disconnection in the event of a grid failure enables a safe transition to backup power operation. The integrated smart meter supports precise grid monitoring and improves load management in backup mode. Protection components such as miniature circuit breakers and residual current devices additionally safeguard operation and ensure controlled switching behavior under different grid conditions.
  
  Technical core functions
  • All‑pole disconnection and automatic changeover for defined backup scenarios
  • Integrated smart meter for precise grid and consumption monitoring
• ConnectivityThe unit integrates into system communication via ModbusTCP, enabling reliable data synchronization with the inverter. The smart meter provides detailed power and grid parameters, allowing precise control of the backup power circuit. Internally routed terminal blocks and cable glands simplify structured cabling and support a clean installation process.
  
  Communication and connection structure
  • ModbusTCP connection for monitoring and real‑time data
  • Push‑in terminal technology with clearly defined cable routing
• WarrantyThe grid changeover box is covered by a two‑year product warranty. This covers manufacturing and material defects and thus provides a predictable safeguard for installation projects that rely on defined backup functionality.
• QualityThe enclosure is designed for indoor use and offers a robust construction tailored to the requirements of professional system environments. The integrated protection components are industrial‑grade and ensure reliable switching processes and a high level of operational safety. The manufacturing quality supports consistent performance even with frequent load changes.