Hello, would it be possible to limit feed-in by component, I explain myself to having the opportunity to say I do not want to exceed so many watts via the ac-coupled pv and so many others for the pv-coupled. The sum of 2 not being able to exceed me “maximum feed-in”?
the idea being to avoid multiplus to heat unnecessarily.
Eventually you could limit the Inverter-Power to match your needs, then remaining DCPV will be throttled I assume. Not sure, if that takes precedence over “Enabled DC Feedin” or the other way round.
But that would also affect the power you can drain from the battery.
Thank you, it’s an idea indeed but as you say it will limit me elsewhere. There my need is really not to heat the multi for feed-in dc
Using Nodered (large image) it should be quite easy to limit the inverter power for a certain time, say 10-16, when you expect high Feedin otherwise.
You could even make some smartrule there, like applying a limit of 3000, when dcpv > 3000, else no limit.
But would first test with a regular 24/7 setting if it works as expected.
Yes, indeed, I’ve considered Venus OS Large, but can I keep my current Venus version and upgrade to OS Large without getting the new version of Venus?
If possible, in that case, I might be able to use a Ruuvi to chain its temperature with a change in the maximum feed-in.
If you use the ESS assistant, you can limit grid export. I originally wanted to go off-grid with my current solar system, but the off-grid installer recommended I stay grid-tied instead. He connected the east and west arrays to a 450/100 MPPT controller. I kept the north-facing arrays on their existing AC-coupled inverters across 2 phases. I used a Multi 48/5000 and connected critical loads to it. This setup allows me to export directly to the grid from the PV inverters without using the Multi to control them, while still having the option to use the Multi’s charger for excess solar charging. There’s more than enough MPPT solar capacity to cover an outage if needed, and I can also AC couple one of the inverters to AC out if I need additional power during an outage.
I do have a flow that dynamically adjusts this export limit because I am limited to 5000W per phase, and the system offsets both phases using net metering. This makes sure I get the max on phase 2, which has the Multi.
You can use the same flow to adjust inverter power. I have a formula and look at what L1 power is doing in this function. You can modify it to check for whatever you want just create the variable.
The flow code is in the text file.
adjust export limit.txt (5.4 KB)
Thanks @owenb79 , nice dev, for my part I would prefer to base myself on the temperature of my multi to reduce the max feed-in, finally if it is possible
If you have an RPI lying around, stick the Venus OS large image on there and enable demo mode. Make sure you put the large image on the set demo to ESS, and you can see what you can do. Access the node from the VRM portal under the venus os large tab. You can get temp from many sources. If you look at the ESS menu, you can also adjust the inverter power.
If you need any help, let me know.
Thanks @Owen for your help and suggestion, unfortunately I don’t have any RPI lying around. 
You can install Node-RED on a live system and program it. You will need debug nodes to see the output instead of what it’s doing to the system. The flow I posted has enough code to get you started and see how to set a variable and grab it, and do what you want. All you need to do is get the temp. I do all my testing on my pi. It’s very inconvenient for the family when I shut down the system due to an error in the program.
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