question

plot avatar image
plot asked

Provide DC power via NodeRed

Hi,

I have a device powered by the 48V DC power. I have the current power consumption already available in NodeRed on the Cerbo. Is there a possibility to feed in this consumption as a consumer device for the DC power?

Node-REDdc meter
1 comment
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

kevgermany avatar image kevgermany ♦♦ commented ·
@plot

Moved to modifications space as it's a Node-red question.

0 Likes 0 ·
1 Answer
matt1309 avatar image
matt1309 answered ·

Hi @plot

You could use a custom driver setup to behave like a virtual smart shunt. Then either pass the data from node red to the "virtual" smart shunt via MQTT. Or pass it directly via dbus using exec nodes.

Here's how to do it:

howto add a driver to Venus · victronenergy/venus Wiki · GitHub

Here's an example dummy script:

velib_python/dbusdummyservice.py at master · victronenergy/velib_python · GitHub


In the dummy script you'd need to change com.victronenergy.dummyservice.ttyO1

to I think it'll be something like:

com.victronenergy.dcsource.ttyO1

or

com.victronenergy.dcload.ttyO1

but here's dbus info just in case im wrong you can find the right one.

dbus · victronenergy/venus Wiki · GitHub

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.