Flexible Three-Phase Inverter for Every Roof

The Fronius Symo 4.5kW Solar Inverter - 3 Phase is part of the renowned Symo series, designed for system designers and installers who need maximum flexibility. With its transformerless design and wide input voltage range, it’s perfect for residential and light commercial installations with complex roof layouts or varying orientations.

Built-In Communication and Monitoring

This model features built-in data logging and web server capabilities, making remote monitoring and updates simple. The inverter supports connectivity via WLAN or Ethernet, and integrates easily with third-party smart meters and energy management systems using Modbus TCP, SunSpec or Fronius Solar API (JSON).

High Efficiency and Reliable Performance

With a maximum efficiency of 98% and a European efficiency of up to 97.2%, the Fronius Symo 4.5kW Solar Inverter - 3 Phase delivers consistent energy yields. Its active cooling and regulated air flow ensure stable operation across a broad temperature range from -25°C to +60°C.

Smart Grid and Safety Ready

Designed for evolving grid requirements, the inverter is smart grid ready and supports dynamic feed-in management. Integrated protection features such as DC disconnector, insulation monitoring, reverse polarity protection and residual current monitoring (RCMU) provide added safety and compliance.

Technical Highlights

• 4.5kW nominal AC output, 6.5A output current
• Two MPP trackers with SuperFlex Design
• IP65 protection for indoor and outdoor installation
• Wide MPP voltage range: 150–800V
• Built-in interfaces for WiFi, Ethernet, Modbus, and USB

Designed with Installers in Mind

The Fronius Symo 4.5kW Solar Inverter - 3 Phase is a smart, scalable solution for installers looking to deliver long-term value to their customers. Lightweight, easy to install, and fully equipped for future energy needs—it’s a reliable choice for solar professionals across the EU.