I have a question that i am certen off that someone knows the answer for.
If a use the multiplus II assistant to switch on/off my generator, does this also inhibit the multi to feed energy to the grid when it switches the generator on? And if it has switched the generator to on, does this also change the setting for L1 in the cerbo from grid to generator?
I could check it myself but i have a lot of stuff running on the multi (servers) and testing this needs the multi to switch off power. So maybe someone knows the answer.
I use ESS and a solar invertor connected to the multi 's AC-Out-1 (the UPS power).
Thanks.
Quick answer: no, the generator assistant doesn’t block feeding excess solar into the grid and it also doesn’t change the input setting from Grid to Generator.
ESS is not really compatible with a generator.
You could build something with NodeRed or some custom scripting to change a bunch of parameters (such as the source of AC In from Grid to Generator) if it detects that you’re running off generator instead of the grid, but that remains dangerous.
In my opinion the safest option: if you’re running off generator, turn off your solar inverter (and then some).
Since you’re using ESS I’d recommend to use a relay on your GX device to start/stop your generator, the GX has way more advanced generator control options.
The NO (Normally Open) contact of the relay can be used to drive a “Start generator” relay, the NC (Normally Closed) contact of the same relay I’d connect to a relay between AC Out and your PV inverter.
This is a minimal configuration to ensure you won’t feed energy back in to your generator.
Hee thanks.
Very clear.
One more question.
I am in the process of changing my pv to the dc site using victron mppt controllers.
Other then disconnecting the cables from pv i see no way to stop these producing.(whitch would be a stupid way to do it).
I saw an option in one of the addons to automatically switch of ess when certain conditions are met. (Forgot which one, and can not look it up right now).
Do you think it is a workable idea to experiment with this?
With NodeRed it’s easy to turn off the MPPT chargers.
Since those are connected on DC side and not on AC side, it might be a lot simpler to prevent them from feeding back to the grid / generator.
Removing the grid code from the Multi might be enough, but this also removes ESS.
I hear a lot about node red but have no idea what it and how to integrade it into my multi+cerbo environment. (Seperate server, linux,windows, rs232/486, modbus, in place of cerbo or as extra etc etc)
I am a programmer for my profession, so i like to “controll things myself”.
Since i wand to do a lot of things that multi/cerbo can not by default (send messages to telegram for example for immediate alarms, and more).
I do not ask you to explain it all to me, but could you show me a good “nodered for victron for dummies” site or document where i could begin my learning curve? 
Thanks
Never mind.
I found a good beginners webinar.
I should use google before asking 
Thanks for your time.
NodeRed is part of the Victron “Large” GX image 
A simple slider button to turn my MPPT On or Off looks like this:
Should be fairly simple to parse the “Generator” node and use it to control other stuff.
But (disclaimer: no warranty whatsoever here !) if you turn off the “DC-coupled PV - feed in excess” option in your GX, maybe that’s good enough.
