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Fronius Symo 3.7-3-M Light Three-Phase Inverter

Modelo: Symo 3.7-3-M Light

Sku: FRONINV039
Vendor: Fronius

€1.334,05 EUR

€1.067,23 EUR

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Fronius Symo 3.7-3-M Light Three-Phase Inverter of 3.7 kW with 2 MPPT, ηEU 96.9% and IP65. Version without WLAN for integration via RS-485; ideal for self-consumption with roofs of various orientations.

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Specifications

Product Description

The Fronius Symo 3.7-3-M Light Three-Phase Inverter combines 3.7 kW of power with two independent MPPTs to maximize energy on roofs with different slopes or orientations. It maintains the Symo 3.7 kW electrical platform, a European efficiency of 96.9%, and the SnapINverter design with IP65 protection, but omits WLAN/Ethernet and web server to reduce CAPEX when monitoring is centralized in an external EMS/meter.

Main Features

Nominal power: 3.7 kW three-phase; European efficiency ~96.9% (max η 98%).
2 MPPT (2+2 inputs) with wide DC range 150–1000 V; Umpp 150–800 V.
SuperFlex design to manage partial shading and different orientations.
Safety: DC isolator, insulation monitoring, and reverse polarity protection.
IP65 and active ventilation for indoor/outdoor use; SnapINverter technology for quick installation.
Light connectivity: RS-485 Modbus RTU (SunSpec) and digital I/O.

Advantages or Benefits

Optimized cost: same performance as the WLAN version with less communication hardware.
Design flexibility with two MPP trackers and 2+2 inputs.
Lower OPEX: front access to terminals, easy maintenance, and diagnostics via EMS.
Grid compliance with power control and programmable cos φ.

Purpose or Applications

Three-phase residential self-consumption and small C&I, roofs with multiple slopes, zero feed-in projects, and dynamic power control where monitoring is performed from a master system.

Technical Specifications

Power	3,700 W three-phase AC
Nominal voltage	PV 150–1000 V (Umpp 150–800 V; start-up 200 V) · Grid 3-NPE 400/230 V · 50/60 Hz
PV inputs	2 MPPT · 2+2 inputs (16 A max/MPPT; Isc 31 A/MPPT)
Format	Wall-mounted SnapINverter · IP65 · active ventilation

Compatibilities

Integration via RS-485 (Modbus RTU) with meters/EMS; compatible with Fronius Smart Meter for zero feed-in, Fronius Wattpilot (EV charging), and Ohmpilot (DHW). Prepared for SPD modules on the inverter's DIN rail.

Fronius Symo 3.7-3-M Light is a professional, flexible, and cost-effective solution to maximize production on roofs with multiple orientations while maintaining a tight budget.