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Installers & partners

Fronius SnapINverters Product Guide


Installing a Fronius SnapINverter is remarkably easy. All DC and AC cabling is done in the integrated connection area of the wall bracket. The compact, lightweight inverter is simply hung into the wall bracket and snapped in. The entire installation process requires no special tools. Please note the maximum torque values marked on the side underneath the terminals.

System Design

To support you in comprehensively planning and designing PV systems when consulting and providing solutions for your customers, we offer the Fronius Solar.creator as a free, flexible and user-friendly online configuration tool.

It can be individually adapted to your needs and, with its numerous functions, offers assistance in all planning stages of your projects.

Fronius SnapINverters can be conveniently ordered or retrofitted with various options such as DC overvoltage protection, a DC connector kit or MC4 connectors.

You can find more information here.

Our optional DC surge protection is available as follows:

  • Type 1+2: Symo 3.0 - 20.0 kW, Primo 3.0 - 8.2 kW, Symo Hybrid and Eco inverters.
  • Type 2: Symo 10.0 - 20.0 kW and Eco inverters.

The maximum usable input current specified in the datasheet (Idc max MPPT1 / MPPT2) may be exceeded without violating the manufacturer's warranty conditions.

It is important to note that the maximum short-circuit current of the module array Isc max must not exceed the value specified in the datasheet.

If Idc max is exceeded, it should also be noted that the inverter actively limits the current at the specified value. Accordingly, small yield losses are to be expected.

DC power optimisers adjust the voltage of shaded PV modules by boosting or decreasing it. The component requires energy to do this.

The more shade there is, the higher the consumption of the optimiser, and the lower the efficiency. This means, especially in partial shading situations, that power optimisers often cannot compensate for the shade, so they do not generate a higher yield.

Certain Tigo optimisers have been tested by Fronius. Their compatibility can be confirmed. Other compatibilities of optimisers can not be confirmed.

The "Fronius Arc Guard" safety function is used to detect and interrupt DC arcs in PV systems. The function was developed to comply with the IEC 63027 standard. It addresses the technical requirements for "Arc Fault Protection Equipment" (AFPE) and "Arc Fault Circuit Interruption" (AFCI) in photovoltaic systems.

The function requires specific hardware and is therefore not included in all Fronius SnapINverters. Only Symo Advanced devices have the hardware integrated and offer the "Arc Guard" function to further increase the safety of PV systems.

System Monitoring & Control

Fronius SnapINverters have the Fronius Datamanager 2.0 integrated ex works, but are also available in a “light” version without Datamanager. The Datamanager can also be installed into a "Light"-Device retroactively.

You can connect up to 100 SnapINverters in one system into a Solar Net communication loop using a single Datamanager 2.0 to save time and costs. However we recommend smaller loops of up to 10 devices each, to reduce the risk of differences in the electric potential and to simplify troubleshooting. The exception is the Symo Hybrid, which has a Hybridmanager integrated instead and does not support inverter-to-inverter communication via Solar Net. The Data- or Hybridmanager connects the inverter to the Internet for system monitoring on Fronius Solar.web. 

The Data-/Hybridmanager offers 4 digital outputs for intelligent load management as well as interfaces for third party compatibility. Fronius also offers sector coupling solutions for water heating in the form of the Fronius Ohmpilot as well as e-mobility solutions such as the Fronius Wattpilot.
1. SnapINverter with Datamanager 2.0:

With a SnapINverter with Datamanager 2.0, dynamic power reduction can be activated to limit the power fed into the grid by the system while maximizing direct self-consumption. This can also be used for zero-feed-in systems. To use this function, a Fronius Smart Meter is required for this purpose.

2. SnapINverter Light with external 3rd party S0 meter

Dynamic power reduction of 99%-0% can also be implemented with a SnapINverter Light without Datamanager 2.0. For this the multifunctional power interface of the SnapINverter Light is connected to the S0 counter. In this How-To Video the technical implementation of the function is explained. In the application guide in the download box you will find additional step-by-step instructions. 



Fronius SnapINverters can not only be installed in a quick and easy way, but can also be serviced efficiently. In the event of service, individual components, such as circuit boards, or the entire device can be replaced.

To keep the handling of the service case as efficient as possible, the convenient Fronius Solar.SOS service tool supports you. Using the app or browser version, you can initiate the service process online directly at the system location. All you need is a serial number or a state code. This gives you the opportunity to easily solve technical problems as well as place orders for spare parts yourself at any time, without having to call the support hotline.

Download Solar.SOS here


"Forgot password" function on the user interface of the inverter

The local user interface of the inverter is protected by a User password, an Admin password and a Service password.

With the function "Recovery Key" in Fronius Solar.SOS you can generate the recovery key to reset these passwords of your device.

The password can be reset as follows:

  1. On the user interface of the inverter, click on "Forgot password" to generate a PIN.
  2. On Fronius Solar.SOS, go to "Recovery Key" and fill out the mandatory fields to generate a recovery key.
  3. On the user interface of the inverter, enter the generated recovery key and set your new password.
Please note: To be able to generate a recovery key, you require supervisor or owner permissions on Solar.web for the device.


Fronius Smart Meter

The Fronius Smart Meter is used to visualize the power flow in a system on Fronius Solar.web, including the direct consumption of the produced pv power as well as how much exceeding energy is available. This enables smart energy management solutions to improve self-consumption. We recommend installing the Fronius Smart Meter at the grid feed-in point, where it measures the ingoing and outgoing power of the whole system.The Fronius Smart Meter is required when installing Fronius Storage Solutions, the Fronius Ohmpilot or the Fronius Wattpilot. It is also required for setting up a dynamic power reduction, in case a feed-in limitation is required by the grid operator.

Energy Profiling

With the Fronius Energy Profiling, it is possible to measure consumers and generators using more than one meter: additional secondary Fronius Smart Meters can be connected alongside the primary Fronius Smart Meter. This way the measured consumers and generators can be displayed on Fronius Solar.web.The number of additional meters that can be connected depends on how many devices are already connected to the Modbus interface. You can find a detailed explanation in the manuals linked to the right.

Please note: All Fronius Smart Meters, independent of version or age, can be combined in one system for the Energy Profiling.

Product Registration & Warranty

Following a quick and free registration process at, owners of a Fronius product can select an attractive warranty model, depending on their region, that perfectly matches their individual requirements.

Please note: The product registration must be completed within 2 years of the system installation.

Fronius Sensors

With the Fronius Sensor Card / Box, up to six sensors for measuring irradiation, ambient temperature, module temperature, wind speed, etc. can be integrated into the Fronius system monitoring package. By measuring irradiation levels and module temperature, you can quickly identify anomalies in the system output to keep performance at a consistently high level. You can choose between a box and a card. 

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