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  • Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter
  • Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter
  • Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter
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Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter

43.40 KGS
Calculated at checkout

Product Description

Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter – this is an independent review for Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter we have compiled for your reference. Feel free to add your comments or experiences at the bottom of the page.

Maximum flexibility for the applications of tomorrow.
Boasting power categories ranging from 3.0 to 20.0 kW, the transformerless Fronius Symo is the three-phase inverter for systems of every size. The high system voltage, wide input voltage range and two MPP trackers ensure maximum flexibility in system design. The standard interface to the internet via WLAN or Ethernet and the ease of integration of third-party components make the Fronius Symo one of the most communicative inverters on the market.

The Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter can perfectly be installed in a Fronius Power Package


 Unique Fronius PC board replacement process

The foundation of the unique PC board replacement process is laid as we develop our inverters, as PC boards can only be replaced if the device has been designed accordingly. This enables our Fronius Service Partners to provide the fastest inverter servicing on the market.

  SnapINverter mounting system

The special feature in the design of our devices is that the connection compartment is separate from the power stage set compartment. They are installed separately. The connection area and all its cabling is fitted to the wall first. The power stage set compartment is fitted afterwards. The innovative SnapINverter mounting system makes installation and servicing extremely user-friendly. The inverter is simply placed in the wall bracket and then secured. It is not necessary to remove the entire inverter for servicing, just the power stage set compartment. All the cabling, settings and configurations remain in place.

  Automatic HF transformer switchover

Fronius transformer inverters use a high-frequency (HF) transformer. The automatic transformer switchover facility produces three efficiency peaks. The result: a constant level of efficiency across the entire input voltage range, resulting in higher yields. Other advantages of HF transformer technology are the compact, lightweight design and safety as a result of the electrical isolation.

  Integrated WLAN interface

Simple, user-friendly system monitoring is very important to Fronius. With the Fronius Datamanager, we are the first inverter manufacturer to offer a WLAN interface in the inverter itself. The inverter is connected to the internet without additional cabling and grants you the perfect overview of how the PV system is operating.

  Smart Grid Ready

Fronius inverters are ready for the Smart Grid of tomorrow. The inverters are optimally equipped to meet the technical requirements of grids in the future. A series of smart functions, known as Advanced Grid Features, are built into the devices. These include a number of control functions for optimum feed-in of reactive power and effective power. These functions are designed to enable stable grid operation even when the PV system density is very high and to prevent unwanted interruptions to feed-in and associated yield losses. Fronius inverters therefore help to guarantee the yield of a PV system.

Technical Data

INPUT DATAFronius Symo 17.5-3-M
Max. input current 
(Idc max1 / Idc max2)
33.0 A / 27.0 A
Max.array short circuit current (MPP1 / MPP2) 49.5 A / 40.5 A
Min. input voltage (Udc min) 200 V
Feed-in start voltage (Udc start) 200 V
Nominal input voltage (Udc,r) 600 V
Max. input voltage
(Udc max)
1,000 V
MPP voltage range
(Umpp min - Umpp max)
370 - 800 V
Number MPP trackers 2
Number of DC connections 3 + 3
AC nominal output (Pac,r) 17,500 W
Max. output power 17,500 VA
AC output current (Iac nom) 32 A
Grid connection (Uac,r) 3~NPE 400 V / 230 V or 3~NPE 380 V / 220 V
Min. output voltage
(Uac min)
260 / 150 V
Max. output voltage
(Uac max)
485 / 280 V
Frequency (fr) 50 Hz / 60 Hz
Frequency range (fmin - fmax) 45 - 65 Hz
Total harmonic distortion < 2 %
Power factor (cos φac,r) 0 - 1 ind. / cap.
(height x width x depth)
72.50 x 51.00 x 22.50 cm
Weight 43.4 kg
Degree of protection IP 66
Protection class 1
Overvoltage category (DC / AC)1) 2 / 3
Night time consumption < 1 W
Inverter design Transformerless
Cooling Regulated air cooling
Installation Indoor and outdoor installation
Ambient temperature range -40°C to +60°C
Permitted humidity 0 % to 100 %
DC connection technology 6x DC+ and 6x DC- screw terminals 2.5 mm² - 16 mm²
Mains connection technology 5-pole AC screw terminals 2.5 mm² - 16 mm²
Certificates and compliance with standards DIN V VDE 0126-1-1/A1, VDE AR N 4105, IEC 62109-1/-2, IEC 62116, IEC 61727, AS 3100, AS 4777-2, AS 4777-3, CER 06-190, G83/2, UNE 206007-1, SI 4777, CEI 0-16, CEI 0-21
Max. efficiency 98.1 %
European efficiency (ηEU) 97.8 %
η at 5 % Pac,r2)  91.6 / 95.0 / 92.7 %
η at 10 % Pac,r2) 94.0 / 96.4 / 95.0 %
η at 20 % Pac,r2) 96.1 / 97.6 / 96.9 %
η at 25 % Pac,r2) 96.4 / 97.8 / 97.2 %
η at 30 % Pac,r2) 96.6 / 97.9 / 97.4 %
η at 50 % Pac,r2) 97.0 / 98.1 / 97.7 %
η at 75 % Pac,r2) 97.0 / 98.1 / 97.8 %
η at 100 % Pac,r2) 96.9 / 98.1 / 97.6 %
MPP adaption efficiency > 99.9 %
DC insulation measurement Yes
Overload behaviour Operating point shift, power limitation
DC disconnector Yes
WLAN / Ethernet LAN Fronius Solar.web / Fronius Solar.web, Modbus TCP, JSON
6 inputs or. 4 digital in/out Interface to ripple control receiver
USB (A socket)3) For USB sticks
2 x RS422 (RJ45 socket)3) Fronius Solar Net, Interface protocol
Signalling output3) Energy management (potential free relay output)
Datalogger and Webserver Included
External input SO-Meter interface / Input for overvoltage protection

1) according to IEC 62109-1. DIN rail for optional overvoltage protection (type 2) is included.
2) and at Umpp min / Udc,r / Umpp max
3) also available in the light version

Subject to modifications.


Fronius Symo 17.5-3-M 17.5Kw 3-Phase Grid-Connected Inverter Product Datasheet

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