Support of Sunspec Inverters via Modbus RTU and extended Sunspec Support

[TheRealStefan]

Hi Victron team,

this would most likely also help more people to add Kostal devices.

As I mentioned

here

Help needed - SMA, Solar Edge, Kostal and others

Thank you for taking on this topic and working getting Kostal implementation and throttling to work. Here are my comments and observations. As it already has been pointed out Kostal by default uses Modbus Port 1502 (not changeable) and unit ID 71 (changeable via Modbus or some API implementations i.e. Kostal IoBroker ). I am Using a Plenticore 10 Plus Gen2. I Changed the unitID to 126 via iObroker. I also created an SSH Tunnel to redirect Port 1502 to 502 (quick and dirty like ssh root@loca…

here

Help needed - SMA, Solar Edge, Kostal and others

It sounds a bit like what I described here: It almost works but not quite. As a quick and admittedly dirty workaround, I set up a very simple Node-RED flow. I’d never used Node-RED before, so there are probably better approaches—but this one works: [image] This flow reads the limit that Venus OS calculated for me and passes it to the inverter via Modbus. It works like a charm. For my Kostal Inverter, it’s register 832. So yeah—almost working. Feature request for Victron: for Kostal inve…

and here

Help needed - SMA, Solar Edge, Kostal and others

Answering myself to post a follow up question Is there still work going on to include Kostal in Modbus/Sunspec support? First of all, should this topic stay here, or may I use this info to create a feature request? I know there are a few hurdles but if I can do it, it should be a piece of cake for Victron, right? I guess the biggest blocker for most people to do further testing at the moment is to get a connection to the inverter. To make this easier for people I would suggest making…

It is almost working and only needs some minor tweaking from you folks.

@mpvader you asked for help, didn’t you? Do you need more input?