Connect Sunsynk-Inverter to Home Assistant 

To connect your inverter to Home Assistant you have 2 ways, each way has multiple options

• Using Sunsynk API to connect using software and code.
  • Pros.
    • There are no hard-wiring cables to the inverter.
    • No need to take the front cover off the inverter.
  • Cons.
    • Slower times between data retrieval.
    • if Sunsynk goes down you won’t have data.
• Using a direct connection to the Sunsynk inverter.
  • Pros.
    • Fast reliable connection to the inverter.
    • Data is available when Sunsynk is down.
  • Cons.
    • Can be tricky to connect to the inverter depending on the model.
    • Can be expensive if you go for all in one solution.

For anyone thinking of connecting their Sunsynk Inverter to Home Assistant.

Here are the options on how to get the data into Home Assistant and why there is not a straightforward how-to document.

Home Assistant can talk directly to the cloud and pull the sunsynk data from sunsynk.net, this will be impacted when sunsynk.net is down or you lose your internet connection.

Home Assistant can get data from the inverter RS-485 port, this data is always available and more frequent.

If you go down the RS-485 route you can use ESP32 or Modbus to USB

For Modbus to USB, you then have options of Home Assistant Sunsynk Addon or Solar Assistant.

I have not broken down the sub-options of each choice which can be many and could cost between £25 to £250.

Options:

• ESP Home
• Solar Assistant
• Sunsynk Add-on
• Sunsynk Scraper
• Sunsynk Gatherer
• SolarSynk Add-on

Please select the above option to get more details.