Fronius Symo 17.5-3-M Lite is a 17.5 kW three-phase inverter, part of the transformerless SnapINverter portfolio. This “Lite” model provides the essential high-performance features for commercial and larger residential systems while offering flexibility for communication setup, as it comes prepared for but does not include a pre-installed WLAN module.
Key Features
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Dual MPPT Trackers: Two independent Maximum Power Point Trackers provide design flexibility for complex roof layouts with different orientations or partial shading.
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SuperFlex Design: A wide DC input voltage range (200 – 1000 V) supports high-voltage PV strings and allows for significant oversizing of the PV array.
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SnapINverter Technology: Modular design separates the connection compartment from the power unit, enabling faster installation and easier servicing where only the power stage set needs removal.
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Communication Ready: The “Lite” version is prepared for adding a WLAN module later and includes interfaces like Ethernet (LAN), USB, and RS485 for monitoring and integration.
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Integrated Safety: Features DC insulation measurement, DC disconnector, reverse polarity protection, and prepared for arc fault circuit interruption (AFCI) to enhance system safety.
Technical Data Table
| Parameter | Specification |
|---|---|
| AC Nominal Output | 17.5 kW |
| Max. PV Generator Power | 26.3 kWp |
| Number of MPP Trackers | 2 |
| MPP Voltage Range | 370 – 800 V |
| DC Input Voltage Range | 200 – 1000 V |
| Max. Input Current per MPPT | 33.0 A / 27.0 A |
| Max. Efficiency | 98.1% |
| European Efficiency | 97.8% |
| Grid Connection | 3~NPE 400/230 V or 380/220 V |
| Protection Rating (IP) | IP66 |
| Dimensions (H x W x D) | 725 x 510 x 225 mm |
| Weight | 43.4 kg |
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