Hoymiles DTU-P Integrations

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1

Hi,

I’ve been exploring ways to integrate my solar panel setup into Home Assistant — specifically to monitor production and have the ability to turn the panels on and off.

After some experimentation, I ended up with two very experimental custom integrations that are currently working with my setup (7 panels, 2 microinverters, and 1 Hoymiles DTU Pro-S):

Important note:

Both solutions require the DTU to have an active internet connection, even for local communication. This feels at odds with the Home Assistant philosophy of local control and privacy — and may even pose security risks.

Feedback, testing, and contributions are very welcome!

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2

OpenDTU solves the local aspect. It’s what I use.

3

Thanks, that’s a great solution, and I ordered the parts to implement this next :smiley:

4

Do you know of a way to make this work in American with Duracell being a rebranded Hoymiles?

5

Great work. It works with my HM-400 OEM inverters with DTU on ethernet. I do not see the microinverters though. Just see the following there:

  1. A percent slider which is left at 100%. The extra can go to the grid as it normally does.
  2. Current power. This appears a sigma of all the inverters.
  3. Daily energy. This looks like a sigma of sunrise to the minute production.

What can I do to discover the micros as well? Any pointers?

Mine is Data pro using 2.4 nordic radio on the RJ45 ethernet and an unused access point with an SSID like data-xxxxx.

Anil Garg