Power regulations issues with Hoymiles Firmware 1.1.12/2.0.4 - how to implement new limits?

[radzyku]

Dear communinity,

ever since my Hoymiles HMS-2000-4T received 1.1.12 firmware the whole dynamic power limiter does not work reliably any more. Issues have already been described in several threads, these are the most important ones:
#2784
hoylabs#1890

Now comes my challange. Despite having enough hints on the potential solution, i have no idea how to implement new limits, so that DPL works again with my firmware... after tens of threads I realized that this needs to probably be done via Web API.. Could you please explain me how can i set new limits? or... better not as this is too risky for an unexperienced user and better to wait for a new DTU firmware?

Thank you so much in advance for your time!

[ms49434]

Setting a relative temporary limit through the OpenDTU api is working flawlessly with firmware 1.1.12.
DPL is working flawlessly with firmware 1.1.12.
I am running the above configuration since November 2024.

Which tool/script and which version of the tool/script are you using to send relative temporary limits to OpenDTU?
Is your tool/script waiting for the acknowledgement of the command?
How many times do you send a new limit?
Although the command queue management has been optimized and hardened in OpenDTU, there are still scenarios where ack-control is the better option.

[radzyku]

Hi there!
Unfortunately I can't reliably work with DPL since I got 1.1.12, sometimes limit goes to 100% by itself and wastes stored energy, stays there even though live usage is maybe at 10%, sometimes it goes to 100% and gets stucked, without allowing battery to supply the load - 600W needed, random 180W sent or so - batteries are loaded and have enough power to provide 600W - so I would say it works randomly.

My setup:
2 Batteries connected to HMS-2000-4T, all 4 strings connected, 2 per battery. DPL is set and driven by OpenDTUonBattery, smart meter - Shelly pro 3EM. I don't use any brokers or additional assistants. DTU has the newest firmware. Shelly firmware 20250730-063238

these are my settings from the power meter, maybe something does not line up here?

[ms49434]

Your issue is not related to OpenDTU. You should raise it with the OpenDTUonBattery guys. On top of that, you are operating the HMS-2000 in an unsupported configuration. The MPP tracker logic is not able to do it's job and might get confused, causing unpredictable results. A Victron Multiplus II or similar might serve you better.

[radzyku]

Thank you for your answer and apologies for posting it in a wrong place, wasn't aware of it. Before I go and post it in the right place, could you please elaborate on your statement, that i am not using the microinventer in its compatible way?