marstek_venus_e_modbus_home_assistant

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marstek_venus_e_modbus_home_assistant

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All configuration files for monitoring and controlling Marstek Venus E batteries from Home Assistant via Modbus

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# Marstek Venus E Modbus Home Assistant

Find here all the configuration files for monitoring and controlling **Marstek Venus E v2** batteries from **Home Assistant** via **Modbus**.

Marstek Venus E v3: Some users have reported, that the Modbus registers used here were working flawlessly with their V3 battery, but some actually reported the exact opposite and that their battery was using completely different Modbus registers.
Since I do not own a v3, I am unable to proof either of those.

## Requirements

Have a look here: https://blog.resch.cloud/2025/07/28/marstek-venus-e-in-home-assistant/

### Hardware

- Battery Storage: **Marstek Venus E v2**
- Included RS-485 cable  
- RS-485/Modbus Server: **PUSR DR-134**

### Connection

Cut off the white connector from the included RS-485 cable and connect the wires to the PUSR DR-134 according to the wiring diagram above.  
Then connect the PUSR to the network via Ethernet.  
If the battery storage shows an error or no LEDs on the PUSR light up, the wires are swapped.

### Configuration of the PUSR

Access the default IP address **192.168.0.7** via a web browser (your computer must have a matching address, e.g., **192.168.0.8**).  
Login: `admin / admin`.  
Under **System Parameters**, the password should be changed.

Set **Network Parameters** according to your network:  
Either a static IP address or DHCP (in that case, reserve the address in the router so it does not change).

Set **Port Parameters** according to the RS-485 interface of the battery storage:

- **Baud Rate:** 115200  
- **Data Size:** 8 bit  
- **Parity:** NONE  
- **Stop Bits:** 1 bit  
- **Local Port Number:** 502 (or a different one, just make sure it is correctly set in the HA configuration)  
- **Work Mode:** TCP Server

Save → **Module Management** → **Restart Module**

## Configuration in Home Assistant

### Configuration

To use this, you need to have a ``packages`` directory inside your Home Assistant directory (alongside your ``configuration.yaml``) and point to it in your ``configuration.yaml``. This is a better way of managing your configuration, since you can split your config up into separate files by topic Check out https://www.home-assistant.io/docs/configuration/splitting_configuration/ for more on that.

1) Add the entries from ``add_to_your_configuration.yaml`` to your existing ``configuration.yaml``.
2) Copy ``marstek_venus.yaml`` into your packages directory.
3) Add the contents of ``add_to_your_automations.yaml`` to your existing ``automations.yaml``.

In case you still need it, here is the last old version before merging to a package: https://github.com/reschcloud/marstek_venus_e_modbus_home_assistant/tree/v1-old

### Sample Dashboard

Add the content of ``dashboard.yaml`` to a new or existing dashboard via web GUI if you like.

## All Modbus Registers for **Marstek Venus E v2 (and maybe some v3)** batteries

See here: https://duravolt.nl/wp-content/uploads/Duravolt-Plug-in-Battery-Modbus.pdf

# Support

If you found this useful, feel free to [Buy me a Coffee](https://ko-fi.com/reschcloud). 😉

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