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Installers & partners

Fronius Symo GEN24

Inverters for private photovoltaic systems with backup power function

Our three-phase Fronius GEN24 inverter is the heart of private photovoltaic systems.
The Fronius GEN24 is equipped with PV Point, an integrated basic backup power function that supplies backup power to connected devices via a protected socket (as long as the sun is shining).*
The Fronius Symo GEN24 boasts a wide range of features that support a sustainable, independent energy supply. Discover the key features for installers and their customers:
/ Intelligent energy management
/ Active cooling for a longer service life
/ Flexible and fast installation
/ Easy integration and management of Fronius or third-party components thanks to open interfaces 
*The Full Backup option is not available for the Fronius Symo GEN24 3.0-5.0.
Please choose your desired product.

Product details


Number of MPP trackers2
Max. input current (Idc max)
12,5 A / 12,5 A
Max. short circuit current, module array*
20,0 A / 20,0 A
DC input voltage range (Udc min - Udc max)
80-1000 V
Feed-in start voltage (Udc start)
80 V
Nominal input voltage (Udc,r)
610 V
MPP voltage range (Umpp min - Umpp max)
125-800 V
Usable MPP voltage range80-800 V
Number of DC connections2+1
Max. PV generator power (Pdc max
4,5 kWpeak


AC nominal output (Pac,r)
3000 W
Max. output power (Pac max)
3000 VA
Max. grid power demand10 VA
Max. AC output current8 A
Grid connection (Uac,r)
3~NPE 230V / 400V, 3~NPE 220V / 380V
AC voltage range (Umin - Umax)
154-280 V
Frequency (fr)
50 / 60 Hz
Frequency range (fmin - fmax)
45-66 Hz
Total harmonic distortion<3% @Pnom (230/400VAC 50Hz)
Power factor (cos φac,r)
0,7-1 ind,/cap,
Back-up power1 ~ NPE 220 V / 230 V
Nom. AC output current (380VAC)
4,5 A
Nom. output current (400VAC)
4,3 A


474 mm
530 mm
165 mm
Weight15,61 kg
Weight incl. packaging19,35 kg
Degree of protectionIP66
Protection class1
Overvoltage category (DC / AC) 1)
Night-time consumption<10 W
Inverter designTransformerless
CoolingActive Cooling
InstallationIndoor and outdoor installation
Ambient temperature range-25 - +60°C
Permitted humidity0 - 100%
Max. altitude 2)
3000m / 4000m
DC PV connection technology3x DC+ and 3x DC- push-in spring terminals 2.5 - 10 mm²
AC connection technology5 pole AC push-in spring terminals 1.5 - 10 mm²
3 pole backup power push-in spring terminals 1.5mm² - 10mm²
5x PE-screw terminals 2.5 - 16 mm²
Certificates and compliance with standardsIEC 62109, IEC 62116, IEC 61727, IEC 62909, VDE 0126,
VDE AR-N4105, AS/NZS 4777.2, EN 50549, CEI 0-21, G98/G99, R25​4)
Back-up power functionsPV Point
Sound emissions36 dB(A)
Interference emission classB


Max. efficiency (PV - grid)98,1 %
European efficiency (ηEU)96,7%
η at 5% Pac,r 3)
η at 10% Pac,r 3)
η at 20% Pac,r 3)
η at 25% Pac,r 3)
η at 30% Pac,r 3)
η at 50% Pac,r 3)
η at 75% Pac,r 3)
η at 100% Pac,r 3)
MPP adaptation efficiency99,9%


DC insulation measurementYes
Overload behaviourOperating point shift, Power limitation
DC disconnectorYes
DC Reverse polarity protectionYes


WLAN / 2x Ethernet LANFronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6x digital in/out + 6x digital inInterface to ripple control receiver, energy management
Emergency stop (WSD)Yes
Datalogger and web serverIncluded
2x RS485Modbus RTU SunSpec (third-party supplier) / Fronius Smart Meter, battery, Fronius Ohmpilot


Max continuous output power3000 VA
Nom. output current (Iac max)
13 A
Grid connection1 ~ NPE 220 V / 230 V
Frequency50 Hz / 60 Hz
Max. switchover time PV-Point20 s
Frequency in backup power mode53 Hz

Fronius UP

Is a programme that allows the installer to upgrade a Fronius product via Solar.web – without any additional hardware. Fronius UP offers unique, new and innovative possibilities to expand Fronius products with new features according to the customers` needs at any time. This leads to maximum flexibility and future reliability.

Integrated data communication

We are the first inverter manufacturer to offer a data communication package with fully integrated datalogging, WLAN, Ethernet, energy management, web server and a range of interfaces. The inverter is connected to the internet by network cable or WLAN - without additional cabling - and grants you the perfect overview of how the PV system is operating. Connection to third-party components is provided by means of interfaces such as Modbus TCP SunSpec, Modbus RTU SunSpec or Fronius Solar API (JSON). The open interfaces can also be operated in parallel to the Fronius Solar.web.

Dynamic Peak Manager

The Dynamic Peak Manager is a new MPP tracking algorithm that dynamically adapts its behaviour when searching for the optimal operating point. Its 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.

Multi Flow Technology

Using Multi Flow Technology, different DC and AC energy flows are possible in parallel. On the one hand, this allows energy from the modules and from the battery to be made available for domestic use at the same time. However, it is also possible for the energy from the modules to be simultaneously fed into the battery and the in-house network. Furthermore, not only can the battery be charged from the DC side, but also from the AC side (for example from existing PV systems or other energy sources, such as a wind turbine). This means the inverter is also suitable for AC-coupled retrofitting. The inverter manages these energy flows in such a way that the highest possible degree of self-sufficiency is achieved.

SuperFlex Design

The Fronius SuperFlex Design is an ingenious combination of technical performance attributes that make designing your PV system not only extremely simple, but also incredibly flexible. The key performance factors of the SuperFlex Design are two MPP trackers, together with a high system voltage and wide DC input voltage range. Every DC input, and therefore every MPP tracker, is able to accommodate the entire nominal output of the inverter. Regardless of whether the inverter has to cope with different roof orientations, shading of one or two strings, or the use of residual modules: a Fronius inverter featuring integrated SuperFlex Design will satisfy every conceivable operational PV system planning scenario using just a single inverter model.

full backup

With the full backup option, the entire household, i.e. 1 phase as well as 3 phase devices, can be supplied with electricity in the event of a grid outage. For Full Backup, a battery and a switching device for safe grid disconnection are required in addition to the inverter.

PV Point

The integrated basic grid back-up - a socket that is supplied with power during power outages - ensures that important loads can conitunue to operate should the power fail.

Active Cooling

Active cooling technology relies on one or more fans, which not only avoid hot spots, but also regulate the air circulation inside the inverter, thus keeping the temperature of the power electronics low. This has a positive effect on the service life of the devices, optimises yields and reduces costs. At Fronius, active cooling is supplied as standard in all devices.
More information about the features & availability of this product
Clear HTML version of the operating instructions. Mobile and optimised  for every device.
Information for installation and commissioning


Show all downloads for product

Footnotes for technical data

1) According to IEC 62109-1. Option to retrofit surge protection device DC SPD type 1+2 for 2 MPP trackers available under the following item number: 4,240,313,CK 

2) Unrestricted / restricted voltage range.

3) At Udc,r

4) You can find the current certificates under


  * Isc pv = Isc max ≥ Isc (STC) x 1,25 according to e.g..: IEC 60364-7-712, NEC 2020, AS/NZS 5033:2021.

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