Fronius Symo 15.0-3-M 15KW Inverter

Continuous Power Rating 15000VA
Waveform Pure Sine Wave
Nominal DC Input Voltage 600V
Dimensions 725 x 510 x 225 mm
Weight 43.4kg

KSh 379,000.00 ex. TAX - KSh 379,000.00 inc. TAX


Fronius Symo 15.0-3-M 15KW Inverter

The Fronius Symo 15.0-3-M 15KW Inverter is designed for maximum flexibility for the solar pv applications of tomorrow. With 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 15kW one of the most communicative inverters on the market.

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The innovative SnapINverter mounting system makes installation and servicing extremely user-friendly. 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.


The Fronius SuperFlex Design combines all the system design requirements into a single inverter form. Two MPP trackers combined with a high system voltage and wide input voltage range guarantee maximum flexibility.  The result: an inverter for every application. Thanks to the SuperFlex Design, a single inverter can cope with any challenge – including different roof orientations, shading of one or two strings, or the use of residual modules.


The Dynamic Peak Manager is a new MPP tracking algorithm searching for the optimal operating point. The special feature is that the Dynamic Peak Manager automatically checks the entire characteristic curve on a regular basis and finds the global Maximum Power Point (GMPP), even in partial shade.


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.


In various countries power grid operators require a PV power feed-in limit as a precondition before connection. With dynamic power reduction, Fronius is offering a solution for optimum feed-in management. The Fronius Symo 15.0-3-M Light 15kW Solar Inverter allows zero feed-in into the grid. This meaning that no PV power is fed into the grid. The relevant requirements of the grid operator can be fulfilled by simply enabling a setting on the inverter’s web interface.

With power categories ranging from 3.0 to 20.0 kW, the transformerless Fronius Symo is the three-phase inverter for every system size. Owing to the SuperFlex Design, the Fronius Symo is the perfect answer to irregularly shaped or different roof orientations. A WLAN or Ethernet internet connection as standard plus easy integration of third-party components make the Fronius Symo one of the most communicative inverters on the market. Furthermore, the meter interface permits dynamic feed-in management and a clear visualisation of consumption.

Technical Data


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)
320 – 800 V
Usable MPP voltage range 200 – 800 V
Number of DC connections 3 + 3
Max. PV generator power (Pdc max)
22,5 kWpeak


AC nominal output (Pac,r)
15,0 kW
Max. output power (Pac max)
15,0 kVA
AC output current (Iac nom)
21,7 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
1,5 %
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 Transformerless
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) 97,8 %
η at 5% Pac,r 3)
91,2 / 94,8 / 92,3 %
η at 10% Pac,r 3)
93,4 / 96,0 / 94,4 %
η at 20% Pac,r 3)
95,9 / 97,4 / 96,7 %
η at 25% Pac,r 3)
96,2 / 97,6 / 97,0 %
η at 30% Pac,r 3)
96,5 / 97,8 / 97,3 %
η at 50% Pac,r 3)
96,9 / 98,1 / 97,7 %
η at 75% Pac,r 3)
97,0 / 98,1 / 97,8 %
η at 100% Pac,r 3)
97,0 / 98,1 / 97,7 %
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

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