question

vojtech-kurka avatar image
vojtech-kurka asked

Please make MPPT relays controllable in Node-RED

In Node-RED, there is a Relay node, that seems it can control MPPT relays. But it's not the case, this feature has not been fully implemented in VictronConnect.


Currently it is not possible to control the relay in a MPPT Solar Charger, even though there is a Victron
node offering such functionality. The reason it doesn't work, is that VictronConnect does not have the
required “Manual control” option in the list of selectable Relay modes for the MPPTs. This will be fixed
at some point.

screenshot-2023-04-25-at-153932.png

So, in reality, it's not possible to control the relay now.

Please, could you guys in Victron implement that for us? I see a lot of people around me, who would love this feature.

The relays on Cerbo work great in Node-RED, I love that possibility.

Thank you very much, Vojtech

VictronConnectNode-RED
screenshot-2023-04-25-at-153932.png (305.4 KiB)
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6 Answers
Stan avatar image
Stan answered ·

I would like to join to this request, because two relays on Cerbo is simply not enough :)

Is it possible to enlarge somehow the number of Node-red controllable relays?

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derrick thomas avatar image derrick thomas commented ·
https://github.com/Lucifer06/Venus_rgpio
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Stan avatar image Stan derrick thomas commented ·
Thank you for the link, but do you have something more simple? It is too much programing.
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martin-modr avatar image
martin-modr answered ·

I have the same problem.Today I finished the automation and relied on the functionality of the relay on the MPPT. Relay does not respond to NodeRED requests.Please could it be fixed urgently?

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Stan avatar image
Stan answered ·

Maybe this is an opportunity for Victron to develop some relay extension (with 4-8 relays or more) for Cerbo. @mvader (Victron Energy) @Guy Stewart (Victron Community Manager) What do you think about this?

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Guy Stewart (Victron Community Manager) avatar image Guy Stewart (Victron Community Manager) ♦♦ commented ·
Nothing to announce, but expansion to the IO for niche applications, to take advantage of the platform is definitely something we are thinking about.
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martin-modr avatar image
martin-modr answered ·

What about to control MPPT relays using node-red-contrib-modbus?
Modbus Write.


But I dont know adress of my three MPPT realys.
Is it possible?

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dariusdiy avatar image
dariusdiy answered ·

I will jump on this topic since I'm also looking to control the Mppt's relay via Node-RED, any updates from Victron regarding the "Manual control” in the drop down menu ? or any other workaround for controlling these relay via Node-RED?

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derrick thomas avatar image
derrick thomas answered ·

Unfortunately it is not as simple as just "enabling" something in node red to be able to control the MPPT relays. This would require a firmware change at the MPPT. The relay status is available via the Vebus but it is not writeable. This can only be changed by the MPPT firmware which would take time and resources at the victron level. Probably not something they really are that interested in investing in since they have already indicated that they are looking into other options for system expansion.

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