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  • The Fronius Solar.wattpilot app can be used to start up, configure, operate, visualise and update the Wattpilot. The app is available for Android™ and iOS®.

    Download The Fronius Solar.wattpilot app is available on the following platforms.

    Fronius Solar.wattpilot app image

    You can access the Wattpilot via the app as follows:

    Launching the app

    1. Open the Fronius Solar.wattpilot app on the end device and follow the Setup wizard.
    2. Read and accept the terms of use
    3. Click on "Connect"

    NOTE: Access for the Fronius Solar.wattpilot app must be allowed for end devices with an iOS operating system.
    iOS settings > Privacy > Local network > Fronius Solar.wattpilot > Allow access to local network

    Setting up a hot spot

    The Wattpilot permanently opens a hot spot

    1. Scan the QR code on the reset card or connecdt the end device to the WLAN hot spot. The passowrd is located on the reset card of the Wattpilot.
    2. Follow the further instructions in the app.

    NOTE: The selected WLAN of the Wattpilot must remain connected despite the absence of an Internet connection for end devices with an Android operating system.

    Setting up the WLAN 

    1. Select WLAN and enter the password
    2. Follow the further instuctions in the app.

    NOTE: It can take up to 1 minute to establish the connection! If the signal strength is low, a WLAN repeater must be installed, for example.

    Adding a Wattpilot

    New or connected Wattpilot devices can be added in the Fronius Solar.wattpilot app.

    1. Click on the "+" symbol
    2. Click on the "Add" for the connected Wattpilot
    3. Follow the further instructions in the app

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  • Status codes and remedy on Fronius Wattpilot EV Charger

    Due to phase, voltage and switching function checks of the Fronius Wattpilot, a charging operation may be rejected.

    The status codes are displayed via the LED status indicator (see LED status indicator on page 17) directly on the Wattpilot and in the app under "Status".

    Status Codes



    Fault current detected (LEDs light up pink, the LEDs at the top flash red)

    The residual current device has detected an error.The charging equipment in the vehicle may be defective. Have the charging equipment checked by a specialist.
    Disconnect and reconnect the charging cable.


    At least one phase of the power supply is missing (the LEDs light up blue, the LEDs at the top flash red)

    The device is only being supplied with 2 phases.Make sure that phase 2 and phase 3 are connected correctly. Option: a supply via phase 1 only is possible.


    Grounding fault detected (the LEDs light up green and yellow, the LEDs at the top flash red)

    Grounding fault detected.Check that the connection is properly grounded.


    Relay fault detected

    The relay has not switched.Disconnect the power supply to the device for 5 seconds.


    Backup power mode detected

    53 Hz mains current detected.Observe the instructions in the Operating Instructions.


    Type 2 plug locking failed

    The plug locking system does not work.Remove possible foreign parts in the plug housing.
    Type 2 plug not fully inserted.Insert the type 2 plug into the device as far as it will go until you hear a click.


    Type 2 plug unlocking failed

    The electric vehicle is plugged in. Unplug the electric vehicle.
    "Always locked" under "Cable release" in the Solar.wattpilot app is activated.Deactivate "Always locked" under "Cable release" in the Solar.wattpilot app.
    Release jammed.Insert the type 2 plug into the device as far as it will go until you hear a click. If the problem has still not been fixed: Press the push button on the device. If the problem has still not been fixed: Activate and save "Always locked" in the Solar.wattpilot app, then activate and save "Standard mode" under "Cable release".


    Internal communication error (all LEDs flash red)

    Device is not sending data. Disconnect and reconnect device.
    Perform a firmware update.
    Return device.


    Temperature too high (the LEDs light up yellow, the LEDs at the top flash red)

    Continuous load.Disconnect device and allow to cool down.
    Incorrectly installed cables.Disconnect device and allow to cool down.


    No data available on the flexible electricity tariff (first or second LED - Eco Mode or Next Trip Mode - flashes red)

    Flexible electricity tariff cannot be called up.Check WLAN and Internet connection.
    Wait until the server is available again.


    No connection to the inverter (first or second LED - Eco Mode or Next Trip Mode - flashes red)

    The connection to the inverter cannot be established.Check the network settings. 
    Check the settings of the inverter.


    For Eco Mode, PV surplus or flexible electricity tariff must be activated (Eco Mode LED flashes orange)

    Eco Mode is selected and the "Use PV surplus" and "Use Lumina Strom / aWattar" settings are disabled.Activate the setting "Use PV surplus" and/or "Use Lumina Strom / aWattar".
    Change the mode.
    "Use Lumina Strom / aWattar" is enabled and there is no data connection to the Internet. Cached price data is still available.Check the network settings.


    The set amount of energy cannot be reached in the specified time (second LED - Next Trip Mode - flashes orange)

    The specified time is not sufficient for the desired amount of energy.Extend the specified time for charging. 
    Reduce the desired amount of energy.


    Update of flexible electricity tariffs failed (first or second LED - Eco Mode or Next Trip Mode - flashes orange)

    The connection cannot be established. Check the network settings.

    The charging operation cannot be started, but all LEDs show the ready colour (default blue).

    The vehicle is not being detected.Check vehicle cable and fit of charging plugs

    No LEDs light up after plugging in.

    No power on the junction box.Check the overload fuse of the connection.
    Miniature fuse defective.Check the miniature fuse on the rear of the device. If it has melted, the power connection may not be installed properly. Check the polarity of the power connection before starting another test with a new miniature fuse. Use original miniature fuses only.
    The brightness of the LEDs has been set to 0.Increase the brightness of the LEDs in the Fronius Solar.wattpilot app.
    "Switch off LEDs after 10 s in standby" has been enabled.Deactivate "Switch off LEDs after 10 s in standby" or press the push button on the Wattpilot.

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  • No, unlike other competitor heat pump hot water (HPHW) systems, the Sanden Eco® HPHW system does not require an electric booster element

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  • The Sanden Quick Connection Kit includes the tempering valve, ECV (Expansion Cold Water Valve), elbows, insulation gloves for all the elbows and valves so you have the most efficient set up - you can't buy the insulation gloves separately. Makes the plumbing install much quicker (plumber only needs to source copper + lagging for the copper). Always highly recommended to ensure the Sanden is installed to specifications

    Normally a house with upto 2 bedrooms is 15mm and 3+ is 20mm. 

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  • What are STCs and how many do you get with your Sanden?

    The purchase and installation of a Sanden Eco® Plus Hot Water Heat Pump entitles you to Small-scale Technology Certificates (STCs) – formerly known as Renewable Energy Certificates (RECs). For more information: visit and

    The Sanden HWHP achieves the highest level of STCs of any hot water heat pump, currently available in Australia, and these are as below:

    To find out which zone your postcode is in click here (note this may change so if in doubt contact the clean energy regulator for more information)

    The Table below shows how many STCs are available for each Sanden model in each STC Zone 


    How much are STCs worth?

    STCs can be priced through the Government's STC clearing house or on the open market at places like Green Energy Markets

    So say you bought a Sanden GAUS-250FQS and you lived in zone 4 and the current STC price was $35

    The total discount you would receive would be: 34 STCs x $35 = $1,190. 

    So you would receive a discount of $1,190 off the total price of your Sanden unit (note this is an example only to illustrate how STCs are calculated the actual discount will vary depending on the current STC price).

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  • You have a Sanden Wi-Fi controller with model Wi-Fi-HPD for your Sanden Eco Heat Pump Model GAU-A45HPD and you're finding you can't add the Wi-Fi controller when tapping "Add Device"? Read on below.

    Some symptoms reported by clients are:

    • Wi-Fi Controller shows connectivity, but cannot change settings
    • Heat Pump Status remains on Standby
    • Wi-Fi status lights are correct but cannot find the Wi-Fi controller when tapping “Add Device”.


    • Check that Communication setting mode, C_SE is set to onHP on internal, Smart Controller
    • Remove front cover of Wi-Fi controller, using a Phillips head screwdriver.

    NB: Do not use a screw gun / drill as you will overtighten the screws when re-installing 

    • Identify “SW1” and flick the 4th switch position to the opposite side. (You do not need to flick it back).
    • LED display will be Red/Blue/Red
    • Open the Smart Life App and tap “+” top right corner,then tap “Add Device”:
    • App will search for devices, displays the Heat Pump under the “Discovering devices” heading. Tap “Add”.
    • Enter Wi-Fi Uername and Password, then tap “Next”
    • App will confirm device being added, then tap “Done”.
    • LED display will be Red/Blue/Green

    You can also check out our page PDF page here which includes screenshots ->

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  • Benefits include:

    You can save up to 80% of your  hot water energy costs when compared with a traditional electric hot water system!  The Sanden Eco® Plus Hot Water Heat Pump uses only 20% of the energy required by older-style, electric element  hot water storage systems.

    Not only does a Sanden Eco® Plus heat pump hot water system help save on energy costs, it also delivers:

    (a) Heat Pump Unit Benefits:

    • Innovative technology; up to 50% faster heat recovery than currently available Hot Water Heat Pumps.
    • Industry leading quality & performance; the Sanden Eco Plus gives you the highest level of STC credits of any currently available heat pump hot water system.
    • Class leading warranties; backed by Sanden’s 35 years of operation in Australia.


    (b)  Stainless Steel Storage Tank Benefits:

    • High quality; extra long life duplex stainless steel cylinder.
    • Fully insulated; for extremely low heat loss.
    • Safety, pressure and temperature relief valves.
    • Mains pressure rated.

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  • Yes, importantly no warranty applies to the heat pump unit and the storage tank, where the chloride level exceeds 200 mg/litre and the pH is less than 6.0. If in doubt, seek water quality information from your local council or water supplier.

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  • The Sanden Eco® Plus heat pump hot water (HPHW) system operates like a refrigerator in reverse. It contains a fan that forces air through an evaporator that contains a refrigerant. The heat in the ambient air passes through the evaporator (note: even air below 0 º C contains heat energy) and is absorbed by a natural refrigerant, R744 (aka CO2), which is ozone friendly and does not significantly contribute to global warming compared with most other refrigerants (older style refrigerants have thousands of times more global warming impact for the same amount of gas, when compared with CO2).

    The warm gaseous refrigerant is circulated in the system via a compressor. As it passes through the compressor, its pressure rises, as does its temperature. This hot refrigerant then passes through a heat exchanger to heat the water, which is finally pumped to the storage tank.

    How a Sanden Eco Plus Heat Pump Hot Water services works


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  • Check our comprehensive Sanden not working checklist here if you think you have a problem with your Sanden Eco heat pump hot water system.

    If you're still unsure after going through this guide - please lodge a Pure Electric Service Case here

    Read More

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