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The Fronius Wattpilot is the intelligent charging solution for all electric car owners.

The Wattpilot is available in two variants – the permanently mounted Wattpilot Home for the household (in an 11 kW variant) and the mobile Wattpilot Go for on the move (in 11 and 22 kW variants).

The device can be operated using the associated Solar.wattpilot app, which also provides an overview of the charging process at the same time. The intelligent plug and play charging solution has two different charging modes called Eco Mode and Next Trip Mode.

What’s more, the Wattpilot is PV-optimised, meaning that the car can be charged particularly cost-effectively and sustainably via automatic 1-/3-phase switching from 1.38 to 22 kW in ampere increments of surplus solar energy.

For basic charging, all you need to do is connect the Wattpilot to the power supply and plug in your car. You can use the Solar.wattpilot app for special settings (PV optimisation, charging modes, etc.).
You can integrate the Wattpilot into a network using WLAN. If the Wattpilot is outside WLAN range, you can boost the WLAN signal using a repeater, WIFI Access Point or PowerLine adapter.
The warranty term is 2 years. 
Yes, you can do that. You can run as many Wattpilots in parallel as you like. Each Wattpilot must be individually integrated into the network. However, PV optimisation only ever works on one device.
No, the Wattpilot communicates with the network via WLAN. It detects and dials into the WLAN network automatically. WLAN will increasingly be provided in car parks as many new cars need WLAN, for example for OTA (over-the-air) software updates.
It is not possible to bill for charging costs directly in the back-end, so there is no way of officially producing an invoice in kWh. However, it is possible to record the power used for charging in kWh and to individually log the time for each RFID chip and charging process. This data can be exported as a CSV file, which would enable the charging time to be invoiced (in minutes).
The scope of supply of the Wattpilot includes the following: mounting bracket, incl. screws and rawlplugs, Wattpilot, miniature fuse, anti-theft device, reset card, ID chip and Quick Guide. The following are available as optional extras: a type 2 cable (5 m), ID chips (10 x), an extra mounting bracket and various adapter kits.
The Wattpilot is made in Austria. 
Wattpilot 2.0 has been developed based on a normative change (IEC 61851-1:2019 and IEC 62752:2016). This standard only concerns the manufacturer. The previous version of Wattpilot 2.0 may still be sold and used.
The Wattpilot 2.0 is produced with a newly designed housing. This ensures a higher IP protection (IP 65 instead of IP 54). The safety plug adapter cable is produced in a shorter length. The WLAN range has also been improved. In line with our sustainability strategy, more components from Europe are used to avoid long transport routes. Furthermore, there are two new versions of the Wattpilot 2.0: the Wattpilot Home 22 J 2.0 and the Wattpilot Go 22 J 2.0 AUS (for Australia). All known software features like PV surplus charging etc. are still available for Wattpilot (1.0) as well as for Wattpilot 2.0.
The two additional strands serve as digital input for future applications and currently have no function.

Installation and start-up

You will need to use the Solar.wattpilot app when starting up the Wattpilot for the first time. The Wattpilot must be connected to the Internet to enable various settings to be made and for remote access. 
Yes! There are no additional, recurring checks and therefore no need for any servicing.
The device has a built-in residual current protection module with residual current detection (30 mA AC and 6 mA DC). This means that no upstream type B RCD is required. A separate type A RCD and an automatic circuit breaker must be connected upstream for each Wattpilot.
CEE sockets are designed for continuous loads. However, it is important to ensure correct installation and that the plug contacts are in perfect condition (no soiling or oxidation).
A Fronius inverter with Fronius Smart Meter is required at the feed-in point. The following Fronius inverters are compatible with the Wattpilot: SnapINverter from Datamanager 2.0 and GEN24 Plus as well as IG, IG Plus, IG TL and CL series in combination with a Datamanager 2.0.

The combination with a Fronius Ohmpilot and a Fronius compatible DC-coupled battery is also possible.

The Wattpilot can also be operated with other inverters / energy sources in combination with a Datamanager Box 2.0 and Fronius Smart Meter at the feed-in point. However, no other selfconsumption controls (battery, Power2Heat, etc.) may be implemented in parallel, because the controllers can interfere with each other. The loads in the household are not taken into account in the display in the Solar.wattpilot app. 
In this case, the maximum charging current is automatically limited to 16 A.
As soon as a CEE plug is fitted, a maximum connection cable length of 30 cm is stipulated by the governing standards. It is therefore not permitted to fit a CEE plug to the connection cable of the Wattpilot Home. Should you require a CEE plug, please opt for the Wattpilot Go.


You can change the charging mode either using the app or a button on the device.

As it stands, there is still no standard for intelligent charging. For this reason, there may be limitations with cost-optimized charging for certain models of car. Fronius endeavours to configure the optimal charging behaviour for every vehicle.The following models of car are affected:

  • Renault Zoe 
  • Twingo 
  • Kia e-Soul
  • Mitsubishi i-MiEV
  • Citroen C-Zero
  • Peugeot iOn
  • VW ID.3 / ID.4  (Due to the charging behaviour, charging must not be interrupted) 

The selection of the car model can be found in the Solar.wattpilot app in Settings - Cost optimisation - Car.

No, it is not possible to do this. However, you can set it to charge to a specific power level in kWh or km, and the electric car will then be charged to this level within a defined time period.

All settings can also be set locally, directly by connecting to the Wattpilot’s hot spot. This is permanently open and secured with a password.The following functions are not possible without a network connection:

  • Remote app access via the internet
  • Coupling with the PV system (PV-optimised charging)
  • Use of flexible electricity tariffs
  • Software updates
No, this is not possible with the Fronius Wattpilot. 
Next Trip Mode ensures that your vehicle is sufficiently charged for your next trip. Watch the video to learn how to use Next Trip Mode.
RFID chips allow you to manage multiple users of a Wattpilot. You can find more information in the video.
It is possible to combine the Wattpilot with Fronius-compatible DC-coupled battery storage units and the Fronius Ohmpilot. Threshold values can be defined for both the battery (state of charge in %) and the Ohmpilot (temperature in °C). As soon as the threshold values are reached, the current power values of the battery and Ohmpilot are considered as surplus. This means that the presence of a battery or Ohmpilot can also be taken into account within the system. Prioritization of the Wattpilot is possible, plus further prioritization of the Ohmpilot and battery can be carried out in the web interface of the inverter.
PV optimisation can only ever be used by one Wattpilot at a time. However, several Wattpilot charging solutions can be operated at staggered intervals. A variable electricity tariff can be used for multiple devices at the same time.
It certainly can! You can easily activate and deactivate PV optimisation and variable electricity tariff use in the app. This would enable a user without a PV system to use variable electricity tariffs. Conversely, a user with a PV system can use the charging modes without variable electricity tariff. And, as you’d expect, both options can be used at the same time.
Yes, you can! You can define this setting yourself in the app. This also allows you to define the maximum phase-load imbalance of the Wattpilot.
Yes, PV optimisation can also be implemented with non-Fronius inverters. However, these must be combined with a Datamanager Box 2.0 and a Fronius Smart Meter at the feed-in point. Apart from that, no further energy management (battery, Power2Heat, etc.) may be implemented at the same time, as the control systems can cause faults. The loads in the household are not included in the display in the Solar.wattpilot app.
PV optimisation takes place in individual ampere increments and is provided as standard from type 2.
This means charging increments of approx. 230 W (1-phase) or approx. 690 W (3-phase) are possible. The advantage is that the power range of the photovoltaic system can be used at optimum efficiency (charging power of 1.38 kW - 22 kW). Switching works on vehicles that have a 3-phase or 2-phase on-board charger.
Yes, regular software updates are supplied for the Wattpilot. Providing the Wattpilot is connected to the Internet, installing these updates is very straightforward. 
Yes, it can. The ID chip has to be connected separately for each Wattpilot. 
In the Solar.wattpilot app, you can activate PV surplus charging and make some advanced settings for it. In the video we show you how it works.
The Wattpilot will charge for at least 5 minutes to protect the relays.
With the flexible electricity tariffs Lumina Strom HOURLY and aWattar HOURLY you can charge your vehicle with the Wattpilot cost-optimized. In the video we explain the activation in the Solar.wattpilot app.
It will charge at the set amperage. There is no need to reset the electricity limit values. 
The variable electricity tariff can be activated under "Settings" - "Cost optimization". Depending on the country-specific availability, either concrete tariffs or bidding zones can be stored. A bidding zone is a defined geographical area in the energy market in which electricity is traded at the current market price. If a bidding zone is used in combination with Wattpilot, the additional surcharges of the concrete electricity tariff used must be added up manually.
Yes, the interface can be used to control the Wattpilot via the Solar.wattpilot app. The interface is encrypted for security reasons and is not publicly accessible.
The Wattpilot can be reset to factory settings using the RFID Reset Card included in the delivery.
The settings for Dynamic Load Balancing are made in the Solar.wattpilot app.
Yes, this setting can be activated in the Solar.wattpilot app under "Settings" - "Load Balancing" - "Dynamic Load Balancing". This setting is necessary if the maximum current carrying capacity of the supply line to the Wattpilot charging boxes is lower than the fuse protection at the house connection point. This prevents the circuit breaker of the supply line from tripping.
Yes, the Wattpilot has the Open Charge Point Protocol (OCPP) 1.6 J. OCPP is a standardized interface of charging stations. The interface can be used e.g. for load management purposes, for visualization or for creating charging reports.
With the charging timer, charging can be blocked or allowed at certain times. This allows, for example, cheaper electricity tariffs to be used overnight. The charging timer can be activated in the Solar.wattpilot app under "Settings" - "Charging timer". With the additional setting "Allow/block charging + PV surplus", charging (grid & PV surplus) is allowed/blocked during the defined period. However, PV surplus is still charged during the blocked times.


You can download the app from the Google Play Store (Android) and the Apple App Store (iOS).
Yes, this is possible via the Solar.wattpilot app.
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In the video we explain the meaning of all parameters in the Details menu of the Solar.wattpilot app.
All information about the amount of electricity charged is displayed in the Solar.wattpilot app.
To be able to assign a new password, the Wattpilot must be reset to factory settings.


The Wattpilot can be reset to factory settings using the RFID Reset Card included in the delivery.
The installer of the Wattpilot should create a service case for the affected Wattpilot on Fronius Solar.SOS. Please make sure to include the serial number, the invoice of the purchase and a picture of the data plate.
The Wattpilot is connected to the Internet via WLAN. You make the settings in the Solar.wattpilot app.
  • Check your Solar.wattpilot app under Settings - Cost optimization - Car - Choose path switch.
  • Make sure your charging cable and your car's on-board charger support three-phase charging.
  • Check the car's app for relevant settings that might limit the charging to one phase.
Make sure to update your Fronius Solar.wattpilot app to the latest version first.
Check your network's wifi signal strength at your Wattpilot. For a stable connection the Fronius Solar.wattpilot app should detect your wifi with at least 50 % strength.
Update your components to the lastest firmware version. For GEN24 inverters with firmware version 1.14.110-1 or higher, make sure the Solar API is activated in the inverter's user interface under "Communication" - "Solar API". Also make sure your inverter and your Wattpilot are within the same IP network, especially if you are using subnets.
Any alterations or modifications to the device without first obtaining the manufacturer's permission can lead to loss of warranty.
Any alterations or modifications to the device without first obtaining the manufacturer's permission can lead to loss of warranty.


You can add your Wattpilot to your PV system in Solar.web in the tab "Settings" - "Components". 

If you have not yet created a PV system in Solar.web, register on and add your Wattpilot and paired inverter when creating the new PV system. When adding the Wattpilot to Solar.web we recommend that the Wattpilot currently has internet connection and is paired with the inverter. Nevertheless it is also possible to add an offline Wattpilot to Solar.web, but Wattpilot data will first be shown, when the Wattpilot is online and paired.
Yes, multiple Wattpilots can be added to a PV system in Solar.web.

For Wattpilot data to be displayed in Solar.web, ensure the following:

  • The Wattpilot (as well as your inverter) must be added to your PV system in Solar.web in the tab "Settings" - "Components". If this tab is not visible, please ask your installer to assign you "Owner" or "Supervisor" rights for your PV system.
  • Both the Wattpilot and the paired inverter must be connected to the internet.The Wattpilot requires firmware version 36.0 or higher.
  • You can update your Wattpilot in the Solar.wattpilot app in the tab "Internet".
  • The Wattpilot needs to be paired with your inverter. Go to the tab "Settings" - "Cost Optimization" in the Solar.wattpilot app to pair your Wattpilot with an inverter.
  • If the paired inverter is a GEN24 or Tauro, firmware version 1.12 or higher is required. You can update your inverter in Solar.web in the tab "Settings" - "Components".

If the Wattpilot has no internet connection (e.g. due to weak WLAN), live and history data is not available in Solar.web. History data will not be restored when the Wattpilot reconnects to the internet.

Furthermore, Wattpilot data is only shown if the Wattpilot is paired with an inverter of the same PV system in Solar.web. For example, no data is displayed in Solar.web for periods when the Wattpilot Go is used on the go.

The Wattpilot must be paired with the new inverter in the Solar.wattpilot app in the "Settings" - "Cost optimization" tab. The inverter must be replaced in Solar.web in the "Settings" - "Components" tab. Afterwards, all Wattpilot data will be displayed again in Solar.web.