Hi there - is there a way to turn a fronius on/off from nodered (Similar to Solar Charger Control node which can turn a MPPT450 on and off)?
Warm regards, Emil
You can interact with the power limiter set it to zero. It is not exactly off but also is not producing.
Thank you I have tried it but seems that it gets over written immediately (drops and then back up so assuming venus is sending commands realtime)
You have to resend the signal every 15seconds.
Have you tried using a contactor on the AC side and just switching is that way?
What are you trying to achieve?
Yes contactor will work - My system is in the garage where I also sometimes listen to music - when I do that it is way too noisy - I then use nodered to turn off feedback and my mppt and all is quite except the fronius - ideally there should be a similar setting to do that for fronius 3 things I currently do:
Don’t feed excess DC-tied PV into grid
Don’t feed excess AC-tied PV into the grid
MPPT 450 Off
Since I just discovered this post I’ll just mention that I’ve done extensive work to have Node Red interact with my Fronius inverters.
In that context I can share some important pieces of information:
- You can indeed push the “Power Limit” parameter to the Fronius inverter to (almost but still virtually) disable it
- As @lxonline mentioned, you need to push this value regularly so it doesn’t time out to default value
- In an off-grid (non-ESS) system, a 30 second push interval is fast enough
- In an ESS system, the Victron software updates a lot faster and 30 seconds is not fast enough
- As an alternative, you can use the I/O pins on the Fronius Data Manager card and a physical switch (or GX relay) to throttle the inverter power (IO mapping, DNO Editor)
- It’s even possible to configure the Fronius to go in (virtual) shutdown when it loses comms with the GX (I recommend this setting for safety) so you could shut it down by unplugging the Ethernet cable
- Important to note that the Controlling priorities need to be set correctly for the above to work properly.
Thank you so much Bart - mine is a ESS system and if I dont push power limit every 1-5 seconds it just goes back to full power. using a IO pin could work as my Ekrano GX have a spare relay - just need to make sure my Fronius have the IOs as it is a small Fronius Primo 3.6-1.
Will post back once I tried :-).
If it has the Data Manager card like its big brothers, it will have plenty IO connections 
Just checked it does 
- now need to find the password!
You can reset the admin password from the Solarweb portal (if you have an account).
Hit Settings, then Components, click the checkmark (left) of the Data source, then click the 3 dots (right) and click on “Reset admin password”.
That’s also a good place to push the latest firmware to the inverter and/or Data manager by the way, if they’re not set to auto-update.
Just be very patient, firmware update can take a long time to complete.
Ok all sorted and firmware updated - takes so longgggggggggggggg - I think there might be a challenge with the priorities as logically i should use the IOs as first priority followed by the modbus for ESS. I tested with IO as first priority with pin open 100% and closed 0% - this works no issue and Fronius goes into standby when pin is closed :-), now the question will ESS still reduce feedback given that Modbus is now a second priority? Sun is down here so can only test in AM.
I have “IO Control” as top priority, followed by Modbus and “Dynamic power reduction” last.
None of my inputs are connected so they’re all open.
If I uncheck the blue box at the “0%” line (“reduce power to 0% when pin I4 is open”), my inverter goes in standby.
With the box checked blue, my inverter is throttled by Modbus.
I would recommend keeping an input box checked blue for 100%, but don’t connect anything to that input.
That way the input pattern for 100% is never met, resulting in the next controlling input (Modbus) to take control.
Edit for clarity: this is what I mean with “blue box unchecked”
FYI:
Under “Dynamic power reduction” I have “Limit Entire System” checked, entered the total peak power of my solar panels in the DC power field, checked “Export Limiting Control (Soft Limit)” with Maximum Grid Feed-In Power set to 0W and “Reduce inverter power to 0% if meter connection has been lost” is checked as well.
The end result is that the PV inverter goes in standby mode when it loses connection with the GX.