Three Phase Inverters – SYMO 15.0-3-M, 2 MPPT, Web server & WLAN

The Fronius Symo 15.0-3-M three-phase hybrid inverter is perfect for private solar systems (photovoltaic systems). It is equipped with a PV Point, which provides an integrated backup power supply. For those seeking a more comprehensive backup power solution, this inverter can be seamlessly integrated with a battery system. This innovative inverter offers unparalleled functionality and reliability.

  • Max. output: 15 kW
  • Fully integrated datalogging
  • 10 year warranty
SKU 4.210.052 Categories ,


  • Integrated Internet Connectivity & Data Communication

The inverter has a fully integrated data logging system equipped with WLAN, Ethernet, energy management and a web server. Without extra cabling, it connects to the internet for an overview of the PV system’s functions.

  • SuperFlex Adaptable Solar System Design 

Choose exactly how to design your PV system. The inverter’s unique SuperFlex Design has two MPP trackers combined with a high system voltage and wide DC input voltage range. This means the unit can adapt to various roof orientations and sun conditions — well-suited to any PV system configuration.

  • PV Point

The PV Point is an integrated basic backup power supply feature that is found in some inverters, including the Fronius Symo 15.0-3-M  hybrid inverter. This feature allows the inverter to supply electricity during grid outages, drawing energy from the solar panels to keep the essential loads running.

  • Dynamic Peak Manager: Innovative MPP Tracking

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. The innovative MPP tracking algorithm adapts its behaviour when finding the optimal operating point for your inverter.

  • Multi Flow Technology

With Multi Flow Technology, the Fronius Symo 15.0-3-M hybrid inverter enables a wide range of energy flows to occur in parallel. This allows energy from the modules and battery to be used simultaneously for domestic purposes. Furthermore, energy from the modules can also be fed into the battery and the in-house network concurrently, leading to maximum efficiency. Additionally, the battery can be charged from both the DC and AC sides, making the inverter an ideal choice for AC-coupled retrofitting. The Fronius Symo 15.0-3-M expertly manages these energy flows to achieve the highest possible degree of self-sufficiency.

  • Active Cooling Technology

Powerful fans regulate air circulation inside the inverter, cooling the temperature of power electronics before they can overheat. This maintains the service life of the device, reducing maintenance costs.

  • Full Power Backup

In the event of a grid outage, this powerful inverter can supply the entire household, including both 1 phase and 3 phase devices, with uninterrupted electricity. This is an incredibly valuable feature for those seeking a comprehensive backup power solution.

  • International Safety Standards

All Fronius inverters meet international safety standards, including automatic shut-down in the event of grid failure. The Symo comes with a built-in surge protection device and has an IP66 rating, meaning it’s protected from dust build-up.


Input Data

Number of MPP trackers 2
Max. input current (Idc max) 33,0 / 27,0 A
Max. short circuit current, module array* 68,0 / 56,0 A
DC input voltage range (Udc min – Udc max) 200 – 1000 V
Feed-in start voltage (Udc start) 200 V
Nominal input voltage (Udc,r) 600 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

Output Data

AC nominal output (Pac,r) 15 kW
Max. output power (Pac max) 15 kVA
Max. AC output current 27,1 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,

General Data

Width 510 mm
Height 725 mm
Depth 225 mm
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 – +60°C
Permitted humidity 0 – 100%
Max. altitude 2) 2,000 m / 3,400 m
DC PV 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,

AS 4777-2, AS 4777-3, CER 06-190, G83/2, UNE 206007-1, SI 4777, CEI 0-16, CEI 0-21, NRS 097

Interference emission class B


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%

Protection Devices

DC insulation measurement Yes
Overload behaviour Operating point shift. Power limitation
DC disconnector Yes
DC Reverse polarity protection Yes


WLAN / 2x 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


Three Phase Inverters – SYMO 15.0-3-M, 2 MPPT, Web server & WLAN