POW-HVM3.2H-24V modbus write registers

[AugustoMoura]

Hi I just want to share some extra write registers that I found in my POW-HVM3.2H-24V

I used an ESP32 and this https://github.com/zivillian/esp32-modbus-gateway/ By using the debug menu: "Debug" -> Slave ID 5 + "Read Holding Register" + Register # -> "Send" and comparing with the settings in the inverter screen

Here's the list: (just be careful, I haven't fully tested it)

• 5002 : Buzzer Alarm (range 0-1, settings menu 18)
• 5004 : Backlight control (range 0-1, settings menu 20)
• 5005 : Auto restart when overload occurs (range 0-1, settings menu 6)
• 5006 : Auto restart when over temperature occurs (range 0-1, settings menu 7)
• 5007 : Beep On Primary Source Fail (range 0-1, settings menu 22)
• 5008 : Auto return to default display screen (range 0-1, settings menu 19)
• 5009 : Overload Bypass (0-1, settings menu 23)
• 5010 : Record fault code (range 0-1, settings menu 25)
• 5017 : Charger Source Priority (range 0-3, settings menu 16)
• 5018 : Output Source Priority (range 0-2, settings menu 1)
• 5019 : AC input voltage range (range 0-1, settings menu 3) (0 - 90-280VAC, 1 - 170-280VAC)
• 5020 : Battery type (range 0-2, settings menu 5)
• 5021 : Output frequency (range 0-1, settings menu 9) (0 - 50hz, 1 - 60hz)
• 5022 : Max Total Charge Current (range 10-80, settings menu 2)
• 5023 : Output voltage (one of 220, 230, 240, settings menu 10)
• 5024 : Utility Charge Current (one of 2, 10, 20, 30, 40, 50, 60, settings menu 11)
• 5025 : Comeback Utility Mode Voltage (SBU) (0.5 volts step, settings menu 12)
• 5026 : Comeback Battery Mode Voltage (SBU) (0.5 volts step, settings menu 13)
• 5027 : Bulk charging voltage (settings menu 26)
• 5028 : Floating charging voltage (settings menu 27)
• 5029 : Low DC cut-off voltage (settings menu 29)
• 5030 : Battery equalization voltage (settings menu 31)
• 5031 : Battery equalized time (settings menu 33)
• 5032 : Battery equalized timeout (settings menu 34)
• 5033 : Equalization interval (settings menu 35)

[romanbychkoosf]

thanks for pointing to modbus-gateway! With it I identified temperature sensor of MPPT controller of POWMR 3.6M (or the highest temperature of 2 sensors (inverter and MPPT controller), not really sure)

• platform: modbus_controller modbus_controller_id: smg_inverter name: "Temperature" address: 4557 register_type: holding value_type: U_WORD unit_of_measurement: "c" device_class: temperature state_class: measurement accuracy_decimals: 1 lambda: |- return swapBytes(x);

[odya]

@AugustoMoura thanks. Updated registers map https://github.com/odya/esphome-powmr-hybrid-inverter/pull/17

[odya]

@romanbychkoosf, thank you. Added to read registers list