Fronius Symo Hybrid 4.0-3-S Hybrid Inverter WLAN

Product Description

The Fronius Symo Hybrid 4.0-3-S WLAN Hybrid Inverter increases power while maintaining the same hybrid architecture with direct connection to HV batteries and simultaneous energy flows. With max. efficiency ~97.9%, PV range of 150–1000 V and IP65, it offers reliability and flexibility for residential rooftops or small C&I, as well as professional monitoring on Fronius Solar.web.

Main Features

• Nominal power: 4 kW three-phase; max. η ~97.9% (ηEU ~95.7%).
• Single MPPT (2 inputs) with Umpp 150–800 V; useful Idc 16 A; Isc 24 A.
• Emergency backup available with compatible batteries (see manufacturer's notes).
• WLAN/Ethernet, integrated web server and datalogger for quick commissioning.
• IP65 and active ventilation; stable operation in hot climates.
• Multi Flow: simultaneous load supply, battery charge/discharge, and grid injection.

Advantages or Benefits

• Storage ready: add HV battery when needed.
• Greater savings with feed-in control and surplus management to DHW/EV.
• Simple maintenance and remote diagnostics from Solar.web.
• Grid compliance with reactive power control and programmable cos φ.

Purpose or Applications

Three-phase homes with medium consumption, integration with wallbox and DHW from surplus, and projects requiring basic backup using compatible HV batteries.

Technical Specifications

Compatibilities

BYD Battery-Box HV (H/HVM) and LG Chem RESU* batteries; compatible with Fronius Smart Meter, Wattpilot, and Ohmpilot. *With LG Chem RESU there is no emergency mode.

The Fronius Symo Hybrid 4.0-3-S WLAN provides power, connectivity, and storage readiness, maximizing household energy independence.