[DEVICE_ADD] POW-HVM6.2K-48V-LIP Add Modbus support

[v-moto]

Is your feature request related to a problem? Please describe

I cannot connect a new inverter to the HA

Describe the solution you'd like

I received a description of the inverter's communication protocol from the manufacturer, please add minimal support for this device
Modbus_RTU communication description.pdf

Describe alternatives you've considered

I did not find alternatives for this device, and it is not advisable to buy their adapter because it cannot be connected to HA

Additional context

No response

[softwarecrash]

Let it Check later.
@bigdigital See you a Chance to build it in?

[v-moto]

@softwarecrash @bigdigital
Do you have a usdt trc20 wallet for donations? Because I really like your project and want to support you a little) and maybe it will speed up the adaptation of my inverter a little))

[softwarecrash]

Badly No, PayPal ist linked in the Project for donation.
But sorry it Doenst Speed it Up, i have much Work on buissenes and less free time. So when i can get a Bit time i will Work on it.
Its Bit Tricky to Work without the device, i will try it when find some time

[v-moto]

Okay.
Then I'll send it via Paypal one of these days.
Thank you very much)
If you need any help with the tests, I am always happy to help

[bigdigital]

@v-moto pls contact me in discord so i can send you a test version

[sMusia]

Hi, I’m also an owner of such an inverter. I can join the tests too!

[v-moto]

Hi, I’m also an owner of such an inverter. I can join the tests too!

I have already received the beta, today I will test it, if everything goes well, I will write the result

[v-moto]

Hi, I’m also an owner of such an inverter. I can join the tests too!

Where are you from? And do you have an original adapter for this inverter?

[sMusia]

Hi, I’m also an owner of such an inverter. I can join the tests too!

Where are you from? And do you have an original adapter for this inverter?

I am from Ukraine. Unfortunately, I don’t have the original adapter. Here's the story: I had a POW-HVM-3.5H-24V inverter. At that time, there was no information on the internet about the communication protocol with the inverter, so I independently developed a way to retrieve some telemetry for HomeAssistant. Later, I switched to ESPHOME, which provided more telemetry data. Now, I’ve upgraded to the POW-HVM6.2K-48V-LIP and discovered the com port (RS232) and RJ45 (RS485). I couldn’t establish communication with either port—the inverter simply didn’t respond. That’s when I started thinking that the folks at POWMR might have changed the communication protocol. Then I came across Solar2MQTT and this query...

[sMusia]

Figured out the registers and made a working version based on ESPHOME.

[essergey]

@sMusia How did you manage to get the data?

[tsdaemon]

Figured out the registers and made a working version based on ESPHOME.

Hi! Thank you for sharing, can you share more details how did you do this with ESPHOME? I am also from Ukraine, and I am trying to set the monitoring for the same inverter.

[sMusia]

Figured out the registers and made a working version based on ESPHOME.

Hi! Thank you for sharing, can you share more details how did you do this with ESPHOME? I am also from Ukraine, and I am trying to set the monitoring for the same inverter.

inverter-powmr.zip

I used ESP8266, connection: esp: tx_pin: GPIO1, rx_pin: GPIO3 -> (RS-232 to UART, MAX3232) -> com_port: pin 2 - TX, pin 3 - RX, pin 5 - GND, pin 9 - +12-15V (with a step-down power module for ESP8266 and MAX3232).

ESPHOME yaml in attachment.

Very important!: Make as few requests as possible on the Modbus bus, refer to - Optimizing modbus communications - https://esphome.io/components/modbus_controller

[gyp5y]

Hi there!
I've just got data from my POW-HVM6.2K-48V-LIP using sample provided by @sMusia . It's great! Thank you!
The only thing that looks strange it's "Working Mode" values. I've got 8 and 9 on mine. Do you have extended description for those modes by any chance?

[Fazabein]

Hello, my friend, can you make a tutorial on how to make a BMS cable? and which one should lead to the battery and which one should lead to the inverter? I use a hybrid inverter POW-HVM6.2K-48V-LIP and 2 amsan 48v 100ah wall mounted batteries

. Can you help me ??

[gyp5y]

I use pin-to-pin straight RJ-45 cable connected to RS-485 port on BMS and inverter but your case could be different if your batteries aren't based on JK-BMS hardware. Then I was playing with protocol selection on BMS and on inverter. I don't remember which one I'm using. I will check in a few days and write it here.

[gyp5y]

Protocol on the JK-BMS is (9600)PYLON_low_voltage and on the inverter is LI2 (PYLON US2000 according to manual)

[gyp5y]

@sMusia Using your example makes it read okay but I can't change any value. Maybe you can suggest how to solve this?
[12:34:58][D][select:062]: 'Battery charging priority' - Setting
[12:34:58][D][select:115]: 'Battery charging priority' - Set selected option to: Only PV charging
[12:34:58][D][modbus_controller.select:048]: Found value 3 for option 'Only PV charging'
[12:34:59][W][modbus_controller:027]: Modbus device=1 set offline
[12:34:59][D][modbus_controller:040]: Modbus command to device=1 register=0x14B no response received - removed from send queue
[12:35:00][W][modbus_controller:065]: Modbus device=1 back online
[12:35:00][D][modbus_controller.select:014]: New select value 0 from payload

[gyp5y]

This problem was solved using use_write_multiple: true for switches and other output sensors. PowMR supports only 0x10 function code when setting values. By default modbus controller in esphome sends 0x06 function code. use_write_multiple force it to use supported function code. Hope this will help someone.
My config attached
powmr_lip.yaml.txt