Fronius symo 20KW Grid-tie inverter

PKR 510,000.00

Fronius Symo Lite 20.0-3 20kW – 3 Phase 480 Inverter

Key Points

  • Extensive product line, accommodating a wide range of applications.
  • A trusted name in the renewable energy field.
  • High frequency/phase shift architecture maximizes efficiency while reducing weight.

Out of stock



The transformerless Fronius Symo is the ideal compact three-phase solar inverter for commercial applications of all sizes. The Fronius Symo is the clear commercial choice: boasting power classes from 10 kW to 24 kW, necessary features fully integrated, Fronius SuperFlex Design with dual MPPT, and a streamlined installation process. The SnapINverter hinge mounting system, lightweight inverter and easy commissioning app make installation possible in under fifteen minutes. Several industry-leading features are available with the Fronius Symo including Wi-Fi and SunSpec Modbus interfaces for seamless monitoring and datalogging (with integration of Fronius Datamanager 2.0 card in one per 100 units), field proven Arc Fault Circuit Interruption (AFCI), NEC 2014 compliance, and Fronius’ superb online and mobile monitoring platforms. Also field serviceable, The Fronius Symo is the most communicative, efficient, sustainable and streamlined three-phase string inverter available on the market.


The Fronius Symo, transformerless three phase inverter suits solar PV systems of all sizes. Maximum flexibility in system design is guaranteed with the high system voltage, wide input voltage range and unrestricted use indoors and outdoors. The Fronius Symo Light comes with the option of installing an additional interface card allowing system owners to connect to the internet monitoring system. This can be done through any internet ready device anywhere around the world, giving system owners complete visibility and control.


Fronius Service Partners are able to deliver fast inverter servicing due to the unique way the Fronius Symo range has been developed. These units have been designed specifically to make replacing PC Boards quick and efficient to minimise the amount of down time of the system.


The innovative hinged system design of this inverter offers a simple installation and servicing process for the user. The connection and power stage set compartments are installed separately with the connection compartment and the cables mounted to the wall first, followed by the power stage set compartment. This means when servicing the unit there is no need to detach the whole inverter; only the power stage set compartment needs to be removed, leaving cables, settings and configurations in place.


Fronius have made their inverters connect easily to the communication platforms offered by third party suppliers. The open Modbus TCP SunSpec standard protocol provides a simple way of establishing a data connection to other systems. This is achieved by using the existing Ethernet interface giving reliable communication.


Fronius have future-proofed their technology by equipping their inverters for the Smart Grid of the future. Advanced Grid features have been built into these inverters, these include control functions for optimum feed-in of reactive/effective power. This functionality allows for stable grid operation even in circumstances when the solar PV density is very high and yield losses can be a resulting factor. This helps ensure the return of your PV system.


Built-in DC Isolator Yes
Communication Optional
Country of Manufacture Austria
Dimensions (mm) 725 x 510 x 225
Export Commodity Code N/A
Inverter Power Rating 10.1kW-21kW
Inverter Type String Inverter
Power (Watts) 20000
Standard Warranty 2 years + 5
Weight (kgs) 43.4





Number of MPP trackers
Max. input current (Idc max)
33,0 / 27,0 A
Max. short circuit current, module array
49,5 / 40,5 A
DC input voltage range (Udc min – Udc max)
200 – 1000 V
Feed-in start voltage (Udc start)
200,0 V
Nominal input voltage (Udc,r)
600,0 V
MPP voltage range (Umpp min – Umpp max)
420 – 800 V
Usable MPP voltage range 200 – 800 V
Number of DC connections 3 + 3
Max. PV generator output (Idc max)
30,0 kWpeak




AC nominal output (Pac,r)
20,0 kW
Max. output power (Pac max)
20,0 kVA
AC output current (Iac nom)
28,9 A
Grid connection (Uac,r)
3~ NPE 400/230, 3~ NPE 380/220 V
AC voltage range (Umin – Umax)
150 – 280 V
Frequency (fr)
50 / 60 Hz
Frequency range (fmin – fmax)
45 – 65 Hz
Total harmonic distortion
1,3 %
Power factor (cos φac,r)
0 – 1 ind./cap.




Height 725,0 mm
Width 510,0 mm
Depth 225,0 mm
Weight 43,4 kg
Degree of protection IP 66
Protection class 1,0
Overvoltage category (DC / AC) 1)
2 / 3
Night-time consumption < 1 W

Inverter design

Cooling Regulated air cooling
Installation Indoors and outdoors
Ambient temperature range -40°C – +60°C
Permitted humidity 0 – 100 %
Max. altitude 2)
2.000 m / 3.400 m
DC connection technology 6x DC+ and 6x DC- screw terminals 2.5 – 16 mm²
AC connection technology 5-pin AC screw terminals 2.5 – 16 mm²
Certificates and compliance with standards ÖVE / ÖNORM E 8001-4-712, DIN V VDE 0126-1-1/A1, VDE AR N 4105, IEC 62109-1/-2, IEC 62116, IEC 61727, AS 3100,<br /> AS 4777-2, AS 4777-3, CER 06-190, G83/2, UNE 206007-1, SI 4777, CEI 0-16, CEI 0-21, NRS 097




Max. efficiency (PV – grid) 98,1 %
European efficiency (ηEU) 97,9 %
η at 5% Pac,r 3)
91,9 / 95,2 / 93,0 %
η at 10% Pac,r 3)
94,8 / 96,9 / 95,8 %
η at 20% Pac,r 3)
96,3 / 97,8 / 97,1 %
η at 25% Pac,r 3)
96,7 / 97,9 / 97,4 %
η at 30% Pac,r 3)
96,8 / 98,0 / 97,6 %
η at 50% Pac,r 3)
97,0 / 98,1 / 97,8 %
η at 75% Pac,r 3)
97,0 / 98,1 / 97,7 %
η at 100% Pac,r 3)
96,8 / 98,0 / 97,6 %
MPP adaptation efficiency > 99,9 %




DC insulation measurement Yes
Overload behaviour Operating point shift, power limitation
DC disconnector Yes
Reverse polarity protection Yes




WLAN / Ethernet LAN Fronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6 inputs and 4 digital inputs/outputs Interface to ripple control receiver
USB (type A socket) 4)
Data logging, inverter update via USB flash drive
2x RS422 (RJ45 socket) 4)
Fronius Solar Net
Signalling output 4)
Energy management (floating relay output)
Datalogger and web server Integrated
External input 4)
S0 meter connection / Evaluation of overvoltage protection
RS485 Modbus RTU SunSpec or meter connection