As the energy prices go well below zero on solar peak hours today, I am turning off my SolarEdge inverter on those hours today.
Would it be possible to turn off the mppt-trackers on my MultiRS in a similar way through software (preferably NodeRed) so that the system can still draw power from the grid instead? I know the system is very capable of throttling down solar input, yet I am unable to find the way to control this manually.
Hi @gvs
Would it not be easier to use ESS’s export limit option to 0watts
Which can be set in node red.
I’m not familiar with solaredge but if you’ve setup frequency shifting (assuming it’s supported) I think that ESS functionality should manage it all for you?
Happy for someone to correct me here.
When you are grid connected there isn’t frequency shifting and solar edge doesn’t have the modbus control that other have like the fronius.
The best manual control the multi rs is switch off the pv breaker.
I am also interested in this and the 100 points question is:
How to turn off (individually) the mppt-trackers on a MultiRS through software ?
or, extending the question to the entire RS range,
How to turn off (individually) the mppt-trackers on a RS device (Multi RS and/or MPPT RS) through software ?
For clarity, I am succesfully turning off my SolarEdge inverter through RRCR Power Control. Simply put I connected two wires to the relay on one of my MultiRS’s and closing that relay tells the SolarEdge to stop producing energy.
What I am unable to achieve is shutting down my panels connected directly to the internal MPPT connections of my MultiRS. Obviously the manual breaker switch under the MultiRS accomplishes this, but I need to be present to do that, and I doubt how much that breaker likes to be switched off under load on a daily basis.
I agree. That is not what it is there for. I have separate brekers on the strings. If i get a few minues will dig deeper to see if there a sfotware option that doesn’t affect charging from grid as well
I am also looking for this. Negative prices are now quite common, and I would like to charge from the net during those hours instead of from the solar panels. Even a simple setting exposed through MQTT would already be helpful.
It seems we got the option to disable the mppt trackers in our MultiRS. 
I noticed a new “Solar charger enabled” toggle in VictronConnect…
After a brief search I stumbled upon the /PV/Disable path in my MultiRS dbus.
A Custom Control Node was quickly created and seems to work for me as expected.
Thanks to the ones who arranged this for us!
Can you please post a sccreenshot of this?
Which Victron Connect version?
And which Multi RS firmware version?
Thanks again!
Are you sure those disable the MPPTs?
Remember some wanted to hide the trackers without panels from VRM, so that option for "visibility " was born…
Could you provide the Node-RED flow? Are there any limitations, for example due to write limits?
As I described above you need to create a custom control node to directly modify the /Pv/Disable dbus path for the MultiRS. (0 for enable, 1 for disable, setting is synced to all my 3 multiRS units working together in my 3phase group)
I’ve been using it to turn off my solar panels on the 5-10 days each year that prices are so far below zero that it actually benefits me to not have solar active for a few hours.
You obviously should be fully aware of the risks and consequences of using custom control nodes:
A custom output node can use the found services and paths on the dbus for writing to. This is particularly handy when you need to write to a service/path that is not available (yet) in an existing node.
Downside of using the custom node is that there is no guarantee that the service and path will remain existent with firmware updates. It also requires more knowledge of the underlying system as the services and paths for the custom nodes don’t come with documentation. There are services and paths that are not supposed to be written to by third party services.
Since this is fully undocumented I have no information about limitations or restrictions.
