My setup (HM-1500, HM-800, HM-600, US5000, R4850G, 3xOpenDTU)

[bf4ed]

On April 2023 i purchased HM-600 with 2 Panels. After search for OpenDTU i stumbled on this project, with Battery.
I then purchased HM-1500 and two additional Panels, the spare HM-600 was intended for Battery.
After consideration i purchased another Hoymiles, the HM-800. And here is my setup after completion in August 2023 and testing:

• 2x ESP32 (for OpenDTU-Night, OpenDTU-AUX) with nRF24+, 1,3” OLED Display, SN65HVD230 and MCP2515
• 1x ESP32 (for OpenDTU-Day) with nRF24+
• 1x Hoymiles HM-1500 (Day)
• 1x Hoymiles HM-800 (Night)
• 1x Hoymiles HM-600 (AUX)
• 1x Pylontech US5000 (48V, 4,8kWh)
• 1x Shelly 3EM (Grid consumption IN/OUT)
• 1x Shelly EM (Solar production HM-1500)
• 2x Shelly 1PM (HM-800, HM-600 for consumption and remote ON/OFF)
• 1x Shelly 2PM (Huawei R4850G for consumption and remote ON/OFF(CH1), soft OFF (CH2))

On the House is the HM-1500 with OpenDTU-Day. This one is only for solar production and is set to -600W. I figured out that it is better to have the inverter to run with -600W than with 0W to Grid export. It is more efficient on sunrise and sunset.
The other setup is in the Garage.
HM-800 with OpenDTU-Night is for night consumption, to regulate charging with Huawei R4850G over CAN Bus and monitoring Pylontech Battery over CAN Bus.
HM-600 with OpenDTU-AUX is for auxiliary Power when needed.
I also can select in which phase i connect the inverter when needed (the 1-2-3 Switch on left).

Thanks to the makers of OpenDTU and all others in this community!!! Really great project.

Testing the setup

Building the housing for HM-800

Housing for Huawei charger (Pull out hot swapable like the original :) )

Housing for HM-600

The OpenDTU board, OLED is detachable for testing, later with screw connectors on the front

The 19" cabinet with 3F 13A automatic fuse, thermostat switch is for the power supply for fans on top

Complete, AC IN is 3F selectable on inverters with the switch on the left

And this is the OpenDTU-Day for the HM-1500 in the house

[Manos1966]

R E S P E K T !

[Manos1966]

Hallo @bf4ed
Can you post some explanations regarding the settings of the OpenDTU that controls the R4850G ?
Especially the settings on the Power Limiter Page.
German or English is OK, also screenshots are enough.
(I want to add some information to the Wiki).

RGDS
Manos

[bf4ed]

This is OpenDTU-Night
Power meter is a Shelly 3EM

[Manos1966]

Many thanks for screenshots @bf4ed

I must admit, I look at the pictures of your constructions and I get depressed 🙈 it is so far away from any possibility I may ever have to construct something like this myself.... 😭

Just to make sure I understand the mode of function correctly:

1. HM-1500 with OpenDTU-Day during the day produces and is set to -600W.

2. During the day, the HM-800 with OpenDTU-Night is regulating the Huawei R4850 and charges the Pylontech.
   So, during the day if the Shelly 3em says -600W, the openDTU-Night will order the R4850 to start charging with 600W, correct?
   The Shelly 3em says 0W thus the OpenDTU-Day will order the HM1500 to increase production to reach -600W again.
   The Shelly 3em will say -600W again, at which moment the OpenDTU-Night will order the R4850 to start charging with 600+600=1200W
   The Shelly 3em says 0W again thus the OpenDTU-Day will order the HM1500 to increase production to reach -600W again which is not possible because it is a HM1500 thus it increases another 300W (600W+600W+300W = 1500).
   The Shelly 3em will say -300W at which moment the OpenDTU-Night will order the R4850 to start charging with 600+600+300=1500W
   (I did not mention the power consumption of the household nor that your East/West configuration will always deliver much less than 1500W at any time, for simplification reasons).
   Genius!

3. What I did not understand yet is: How do you start the HM-800 only at night?
   With the Shelly plus 1PM on the Hutschiene I guess?
   What kind of settings do you have on that Shelly? Fixed time?

[bf4ed]

1. Correct (From the beginning i have it at -30W, but then the MPPT is not working correctly, i get much less power, when the sun is weak. Therefore -600W.)
2. Correct
3. Correct (The Shelly1PM is for controlling the output. I have a 10W/230V fan for cooling on output from inverter and to not waste energy i turn it OFF. The timer is set from ON 19-07h in Sommer and now in Winter ON 16-07h.)

[Manos1966]

Many Thanks!

[dragricola]

Hello @bf4ed and @Manos1966
Thank you very much!
The settings you published helped me to put my very similar system to operation.

One small detail can be added in your documentation: For systems that communicate via MQTT with a home automation system it is important to set the MQTT Topics powerlimiter/cmd/mode to 0, huawei.cmd.mode to 3 and the other Topics under huawei.cmd.limit_... to the battery depending values.