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FRONIUS, SYMO 4.5-3-S, 4.5kW, Three Phase Inverter

Inverters
FRONIUS

Fronius Solar Energy is a company that, for 30 years, has been developing innovative products, solutions, and digital tools for the efficient and intelligent generation, storage, distribution, and consumption of solar energy. Today, their name is synonymous with innovations that sustainably enhance the lives of private consumers as well as the businesses of their commercial customers through solar energy, true to the motto "Energize your life."

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Identifications
Brand FRONIUS
Product Code SYMO 4.5-3-S
Type Three Phase
General Specifications
Width 645.0 mm
Height 431.0 mm
Depth 204.0 mm
Weight 16.0 Kg
Min. Operating Temperature -25.0 °C
Max. Operating Temperature 60.0 °C
Max. Operating Altitude 3400.0 m
Relative Humidity 0 - 100 %
Topology Transformerless
IP Rating IP 65
Max. Efficiency 98.0 %
Input
Max. Input Voltage 1000.0 V
Rated Input Voltage 600.0 V
Max. Input Current 16.0 A
Max.Short Circuit Current 31.0 A
Start Voltage 200.0 V
No. of MPPTS 1.0
Max. number of inputs 3.0
MPPT Operating Voltage Range 150 - 800 V
Output
Rated Output Power 4500.0 W
Max. AC Apparent Power 4500.0 VA
Max. Output Power N/A W
Rated AC Output Voltage 400/230 VA
Rated Grid Frequency 50/60 Hz
Max. Output Current 6.5 A
Total Harmonic Distortion < 3 %
Power Factor 0.7 - 1 ind. / cap.
Protection
Anti-islanding Protection N/A
AC Overcurrent Protection Yes
AC Short Circuit Protection N/A
DC Reverse Connection Yes
DC Surge Arrester N/A
AC Surge Arrester N/A
Insulation Detection Yes
Communication
Display N/A
RS485 Yes
USB Yes
Monitoring BUS (MBUS) N/A
WiFi Yes

General Description & Application

Fronius inverters are premium photovoltaic power conversion solutions designed to deliver maximum efficiency, intelligent energy management, and long-term operational reliability. Engineered in Austria and recognized worldwide for innovation and quality, Fronius inverters are suitable for residential, commercial, and industrial solar installations, ensuring optimal energy harvesting and secure grid interaction.

Key Features:

  • Advanced Performance Technology:

    • Dynamic MPPT Tracking: Multiple high-precision MPPT trackers optimize energy production even in complex installations.
    • High Conversion Efficiency: Advanced inverter topology ensures minimal losses and maximum system yield.

  • Smart Energy Management:

    • Integrated Monitoring Platform: Real-time system monitoring via web interface and cloud connectivity.
    • Energy Management Functions: Supports self-consumption optimization, dynamic feed-in control, and battery integration (depending on model).
    • Flexible Communication Interfaces: Ethernet, WiFi, and fieldbus connectivity options available.

  • Reliable & Durable Construction:

    • Active Cooling Technology: Intelligent cooling system ensures stable performance and extended lifespan.
    • Comprehensive Protection Features: Includes over-voltage, over-current, short-circuit, and anti-islanding protection.
    • IP65 Protection Rating: Suitable for indoor and outdoor installations.

Fronius inverters combine innovative engineering with proven reliability, offering scalable solutions that meet modern grid requirements while maximizing long-term energy production and system safety.

Standards

Fronius inverters are developed and tested in accordance with international standards, including:

IEC 62109-1/2 (Safety requirements for PV inverters)
IEC 61000-6-1 / IEC 61000-6-3 (Electromagnetic compatibility)
IEC 61727 (Utility interface requirements)
IEC 62116 (Anti-islanding protection)
EN 50549 (Grid connection compliance)