setting up multiplus for solar priority with external grid-linked solar?

Due to irritating conditions with my grid provider, I can't touch my grid-linked inverters - they can't be moved behind my multiplus-II or the grid provider will terminate my feed-in contract and replace it with a very rubbish one..


So - my question..

I have two inverters (physically separate sets of panels) feeding the grid, I have rs485 metering on the solar feed to grid as well as the overall grid. I am happy and allowd to feed to grid from the inverters, but not the multiplus (else the above feed-in rate change), but want to prioritise battery charging and self-consumption.


What is the best way to do this? I plan to setup a Raspberry Pi with Venus OS and the Node-red image.


Thanks

Bret Watson asked
matt1309 edited ·

2 Answers

Restoring SignalK and Node Red back to Venus OS Large defaults on a CerboGX? (Noobie question)

Sorry for the noddy question - my linux skills aren't the best... I've been playing with SignalK and Node Red on the boat and was pretty pleased with the results. As usual with me, entropy has set it and things don't feel as reliable as before (certainly performance has fallen away). I want to get back to a known good original setup and the selectively rebuild from there based on what I learned.....

Can I please ask the group what's the best way of rolling SignalK and Node-Red back to their original state?

Also, just for added complication, I installed the Signal K Node-Red plugin and stopped the Victron Node-Red install from being accessible.

Thanks in advance

Casp.

caspartfg asked

0 Answers

Data path of a USB stick on the Rasperry pi with Venus Os

Hello everyone

I have a Raspberry pi with Venus OS large and would like to write data to a USB stick plugged into the Pi using Node Red. Unfortunately I couldn't find out what the path of the USB stick is, and all Linux commands don't work to find it out. can someone help me?

saintgtr34 asked
saintgtr34 answered ·

2 Answers

how can i emulate a bmv700 with input from a votronic smartshunt

Hi

i have a raspi 4 with the large Venus OS image on it and a connected mppt100/30 .

output is a 7inch ips touch panel. This works very well.

Node red is activated and i use this to decode the serial output from a vortronic 400A Shunt so i have now following values in node-red at the moment:

- Voltage from the Board and Starter battery in V

- strength of the electrical current in A

-Battery level of the board battery in %

-size of the Boardbattery in AH

now i would like to send this as input to emulate a bmv7xx to the venus os to show it on the display as a bmv.


has someone a idea , best of would be directly in node-red itself

thanks in advance



Holger Blume asked
Holger Blume edited ·

1 Answer

Where did my Node-red flows go? after firmware update node red is empty

Just installed new firmware on my Cerbo GX, updated from 2.80~21-large-23 (20210925...) to v2.90~12 (20220606...) which is also LARGE firmware.

After update, my node-red flows are EMPTY!! and even when I tried to start from backup, the older firmware, still empty FLOWS... Is there any way to return those?

Should the firmware upgrade clear flows from node-red or did I experience some major bug? I understand that node-red is updated a few versions up, was it 2.0.5 and after update 2.2.2 or something like that, but is it meant to clear all flows? Where to get them back...

timo-san asked
mrhappy commented ·

4 Answers

How to load node-red dashboard on startup, replacing venus GUI

Hi,

I've developed my own node-red dashboard on venus large image on RPI. Everything ist running fine now and thats why I would like to access my node-red dashboard directly from my RPI touchscreen display. How can I achieve this ? Is there a startup bash script somewhere on venus@Pi, where I can point to my local node red dashboard ? Or can I even load both UIs and switch with a gesture between them ?

This is how my node-red dashboard looks right now ;) :


[image]

dave68 asked
johanndo answered ·

7 Answers

How to access GPIO Pins in Node Red on Venus Raspi 3

Hello

i have installed the large image of venus with Node Red included. everything works as it should.


i have 5 relays i want to control, but i do not want to do it on the Venus UI, instead i want to listen on the local MQTT Server and if the value true comes in i want to turn the relay on.


My Relais are on the PINS (7,11,13,19,26)


Does anybody knows how to access them in node red?

The standard Raspberry Pi Nodes arent working


[image]


[image]

bo0om asked
bo0om answered ·

3 Answers

Cerbo GX send receive SMS via GSM ?

Has anyone used Node Red to send and receive SMS messages on their Cerbo GX For status and commands?

I have it working with an email plugin but sms would be nicer.
tks

david-ross asked
bo0om answered ·

1 Answer

Simulate energy meters with NodeRed?

Does anyone know a way to simulate an energy meter with NodeRed (Large OS)?

That must be theoretically possible.


Via Tasmota I get my yield from the PV system sent via MQTT.

der-neue asked
tompeel edited ·

1 Answer

Modbus Register for Relay 3,4,5&6 for Raspberry pi

Where might I find the Modbus registers for the Extra relays the Raspberry pi has? I have looked in the Excel Modbus-TCP register list, but can only find Relay 1 and 2.

I used the RpiGPioSetup add-on to assign the extra relays. I can see and control the extra relays using Remote Console.

I currently have NodeRed running on external device controlling Relay 1 and 2. I am looking to control the other relays (3-6). NodeRed is also pulling data from my BMV-712 / other Victron items.


mrorange asked

0 Answers

VenusOS Large with Node Red AC Load DC Load and other nodes not working...

Got it all installed, but the node red integration seems to have issues working with the multiplus/system stats, the few post i can find on it seems to be people walking away from the victron node red integration and going to the modbus api. Wondering if anyone has had better luck.

Short of it, any of the nodes that would allow pulling from the multiplus don't detect it. (Ac Load for example). DC Load also won't detect. But Solar is fine.... On 2.90-10.


[image]

[image]

[image]

alex-harvey asked
Stefanie commented ·

1 Answer

Hello Victron please help us with ESS Phase compensation!

Hi Victron, we are discussing in several threads a nearly similar question without an expert comment by victron-staff:


https://community.victronenergy.com/questions/81114/ess-phase-compensation-not-working.html?childToView=81209#comment-81209


https://community.victronenergy.com/questions/80366/why-does-victron-experts-do-not-provide-an-update.html


https://community.victronenergy.com/questions/55480/ess-system-doesnt-react-not-balanced-to-high-ac-lo.html?childToView=71245#answer-71245


This main problem of an „symmetrical“ or „balanced“ ESS in a three phase grid-parallel setup is absolutely essential for the German and Austrian market. Please let us know what you think about it! Thank you very much!

woliver asked
siebe-r answered ·

5 Answers

How to control charge current of Multiplus with node-red on Cerbo GX

For some years I have controled my Multiplus (old Version not II) with a raspberry pi via two DAC and the assistants for "Charge current control" and "Input current limit control".

Since now an extension of the solar plant took place, I wanted to use a Cerbo GX instead of the Raspberry Pi and do without the DA converters but regulate this purely via software. More precisely, by means of Node-red on the Cerbo GX.

But unfortunately I miss the possibility to regulate the charging current (of the Multiplus charger).

I have installed the "large" einstein- Firmware (V2.82) on the Cerbo GX and I have enabled node-red and I'm using the node-red-contrib-victron node.
Devices are: Cerbo GX, Multiplus 24/3000, BMV-700, MPPT250/60, MPPT 75/15.

The AC charger node reports "There are no ac charger services available. Please check that a ac charger is connected or try a different node." The "multi control" node has no input for charger settings too.

Question now is: How can I control the Multiplus charge limit with node-red?

Multiplus 24/3000/70-16 (Type Id 2612) FW is 209

Regards

Erich

erichabg asked
shaneyake edited ·

10 Answers

node-red exec node reboot

I've been using the Large-Image withe Node-Red for a long time now and previously been able to Reboot or Shutdown my RPi using and Exec node. For Reboot the command has been "reboot #" and "poweroff #" to shutdown.

I have just noticed that neither command now works with an Error: 126. Is there a new command? Is this a permissions thing?

It's all worked so well for so long I've only needed to do updates so perhaps missed some changes. Thanks for any info.

xsilvergs asked
xsilvergs edited ·

0 Answers

Programming max inverter power of Multiplus II-GX using Node Red

Hi all,

I would like to use Node Red to program my Multiplus II-GX so that the max inverter power can be controlled by

(i) time of day (so that the dishwasher does not deplete the battery and the fan does not run at night) and

(ii) battery voltage (so big loads do not take it below the 47.0 volt cut-off limit).

Has anyone done this before? If not, where do I start (I have no prior knowledge of setting up Node Red flows)? Is there a Victron sandbox where I can try out ideas without risk of crashing a live system?

TIA

sharpener asked

0 Answers

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