Add On not showing 2nd inverter in a parallel setup

[Daniel970219]

Issue related to

Sunsynk / mbusd Home Assistant Add-On

Describe the issue/bug

I have 2 inverters in parallel. and when connected to the master it only reads the master modbus values. Would there be any way to get it to read the co bined values from the master

Expected behavior
A clear and concise description of what you expected to happen.

Your environment

• Home Assistant version: 2025.1.x
• Addon:
  • Name: sunsynk-multi
  • Version: 2025-01-11
• Inverter:
  • Make: Deye
  • Model: Sun-5k-SG04LP1-EU-SM2
  • Firmware:
• Adaptor details:
  • RS485
  • peacefair usb to rs485

You configuration

paste config in the block surrounded by 3x backticks

``` DRIVER: pymodbus
INVERTERS:
  - SERIAL_NR: "2508053562"
    HA_PREFIX: Master
    MODBUS_ID: 1
    DONGLE_SERIAL_NUMBER: "0"
    PORT: /dev/ttyUSB0
SENSOR_DEFINITIONS: single-phase
SENSORS:
  - energy_management
  - power_flow_card
  - pv2_power
SENSORS_FIRST_INVERTER:
  - settings
MANUFACTURER: Sunsynk
READ_ALLOW_GAP: 2
READ_SENSORS_BATCH_SIZE: 20
SCHEDULES:
  - KEY: W
    READ_EVERY: 5
    REPORT_EVERY: 60
    CHANGE_ANY: false
    CHANGE_BY: 80
    CHANGE_PERCENT: 0
NUMBER_ENTITY_MODE: auto
PROG_TIME_INTERVAL: "15"
....

### Logs

```logs

paste logs in 3x backticks...

[Waz-Cpt]

Hello Daniel,

Firstly awesome to have you engage with the community.

I believe there is some information on this matter in this #585 update information. I do not see this information expressly included in the documentation. It may need to have the work done and then submitted in a pull request.

But it is possibly that the new feature is not live yet. I just read through things again and I am not sure the pull request was merged.

@kellerza and @maslyankov has there been further progress to using a single modbus device to read inverters connected in parallel?

[maslyankov]

I had a PR, but the maintainer reimplemented it. So I believe there is support for this.
Me personally - I have been using my fork/PR as it has been working steadily with two inverters and one modbus gateway for more than 5 months now.

Sorry for the mess. I haven't had the time to test the current/maintainer implementation yet.

[Daniel970219]

@maslyankov do i just copy and paste your yaml into mine to get this to work?

[Daniel970219]

@maslyankov i get this error when trying to add your add on

[kellerza]

Reading 2 inverters with a single port is supported. Your config should look like this

INVERTERS:
  - SERIAL_NR: "001111111"
    HA_PREFIX: First
    MODBUS_ID: 1
    PORT: /dev/ttyUSB0
  - SERIAL_NR: "00771242"
    HA_PREFIX: Second
    MODBUS_ID: 2         # < unique
    PORT: /dev/ttyUSB0   # < the same

I mention it in the new release notes https://github.com/kellerza/sunsynk/releases/tag/v0.10.1 - but the build is failing.

Until the build is fixed this works in the dev/edge version only

[Daniel970219]

Can I have the dev /edge build repository for now please?

…

________________________________ From: Johann Kellerman ***@***.***> Sent: Thursday, 28 May 2026 12:03 To: kellerza/sunsynk ***@***.***> Cc: Daniel970219 ***@***.***>; Author ***@***.***> Subject: Re: [kellerza/sunsynk] Add On not showing 2nd inverter in a parallel setup (Issue #632) [https://avatars.githubusercontent.com/u/6756881?s=20&v=4]kellerza left a comment (kellerza/sunsynk#632)<#632 (comment)> Reading 2 inverters with a single port is supported. Your config should look like this INVERTERS: - SERIAL_NR: "001111111" HA_PREFIX: First MODBUS_ID: 1 PORT: /dev/ttyUSB0 - SERIAL_NR: "00771242" HA_PREFIX: Second MODBUS_ID: 2 # < unique PORT: /dev/ttyUSB0 # < the same I mention it in the new release notes https://github.com/kellerza/sunsynk/releases/tag/v0.10.1 - but the build is failing. Until the build is fixed this works in the dev/edge version only — Reply to this email directly, view it on GitHub<#632?email_source=notifications&email_token=AY6TK64GKDXK7T6XMUJNX4345AFILA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGI4TAMRTGQYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-4562902340>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AY6TK6YSY7ZFZJKDNFC3O6345AFILAVCNFSM6AAAAACYZB3FAKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DKNRSHEYDEMZUGA>. Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS<https://github.com/notifications/mobile/ios/AY6TK65N5OECA5T4AMIJ2PD45AFILA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGI4TAMRTGQYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android<https://github.com/notifications/mobile/android/AY6TK67COB5TSCIVWSMQYXT45AFILA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGI4TAMRTGQYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[Daniel970219]

This is what I get when using this

…

________________________________ From: Johann Kellerman ***@***.***> Sent: Thursday, 28 May 2026 12:03 To: kellerza/sunsynk ***@***.***> Cc: Daniel970219 ***@***.***>; Author ***@***.***> Subject: Re: [kellerza/sunsynk] Add On not showing 2nd inverter in a parallel setup (Issue #632) [https://avatars.githubusercontent.com/u/6756881?s=20&v=4]kellerza left a comment (kellerza/sunsynk#632)<#632 (comment)> Reading 2 inverters with a single port is supported. Your config should look like this INVERTERS: - SERIAL_NR: "001111111" HA_PREFIX: First MODBUS_ID: 1 PORT: /dev/ttyUSB0 - SERIAL_NR: "00771242" HA_PREFIX: Second MODBUS_ID: 2 # < unique PORT: /dev/ttyUSB0 # < the same I mention it in the new release notes https://github.com/kellerza/sunsynk/releases/tag/v0.10.1 - but the build is failing. Until the build is fixed this works in the dev/edge version only — Reply to this email directly, view it on GitHub<#632?email_source=notifications&email_token=AY6TK64GKDXK7T6XMUJNX4345AFILA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGI4TAMRTGQYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-4562902340>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AY6TK6YSY7ZFZJKDNFC3O6345AFILAVCNFSM6AAAAACYZB3FAKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DKNRSHEYDEMZUGA>. Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS<https://github.com/notifications/mobile/ios/AY6TK65N5OECA5T4AMIJ2PD45AFILA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGI4TAMRTGQYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android<https://github.com/notifications/mobile/android/AY6TK67COB5TSCIVWSMQYXT45AFILA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGI4TAMRTGQYKM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[Waz-Cpt]

@kellerza Do you think that one could now connect to the secondary inverter to poll both inverters? I ask this because the primary inverter is connected to the batteries on Modbus. Trying to find a way to connect without having to use a converter box to convert the batteries to CAN

[kellerza]

If you want data from both inverters you logically connect to both from the addon

As long as the HW bus is shared you only need one usb to RS485 converter with the new version (same port, unique modbus id)

[Waz-Cpt]

I will procure a RS485 to Ethernet device and test connection via the secondary inverter.