Has anyone made their own way of connecting their inverter to a Home Assistant?

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emmahobson

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I'm trying to figure out the best way to connect my Sunsynk inverter to a Home Assistant.
  • Anyone doing it / know how to do it?
  • Any home assistant recommendations for this kind of thing?
Keen to avoid something too hacky if possible. Thanks!
 
I use this to connect my HA to my inverter setup, bought the dongle from the shop linked and it has been absolutely perfect for over a year. It connects to the Rj45 logging port of the inverter, Mine pulls its power from there too, but that is not strictly necessary if you want to not make it too "hacky"

github.com

GitHub - tomatensaus/DeyeSolarDesktop: Home Assistant bootstrap for monitoring solar for Deye/Sunsynk/Sol-Ark

Home Assistant bootstrap for monitoring solar for Deye/Sunsynk/Sol-Ark - tomatensaus/DeyeSolarDesktop
github.com github.com
 
R4ziel said:
I use this to connect my HA to my inverter setup, bought the dongle from the shop linked and it has been absolutely perfect for over a year. It connects to the Rj45 logging port of the inverter, Mine pulls its power from there too, but that is not strictly necessary if you want to not make it too "hacky"

github.com

GitHub - tomatensaus/DeyeSolarDesktop: Home Assistant bootstrap for monitoring solar for Deye/Sunsynk/Sol-Ark

Home Assistant bootstrap for monitoring solar for Deye/Sunsynk/Sol-Ark - tomatensaus/DeyeSolarDesktop
github.com github.com
Click to expand...
This is cool. I see there's a prepaid unit feature which is verrrry handy. How easy is it to integrate this thought and then monitor it as a beginner/novice? (I'm not the most technical but am trying to get there)
 
Its pretty much connect it to wifi and install it via ESPhome in your Home assistant, the guy has awesome guides on the dongle and setup, it is not difficult at all
 
emmahobson said:
That's music to my ears. Thank you
Click to expand...
To build on R4zeil's response.

A while back I built my own with an ESP32 and RS485-TTL board. When that ultimately died, I went to Heinz's site and ordered one of his boards instead of rebuilding my own.

For someone new to this, it's the best out of the box option. It even has a light setup wizard for wireless, and his software is included i.e. the inverter stuff that pops up in Home Assistant after you've added ESPHome. Here is cool video of most of the process, although Scoobs ( the gent in the video ) is installing alternate software ( from Slip on this forum ).
 
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hilt_ctn said:
To build on R4zeil's response.

A while back I built my own with an ESP32 and RS485-TTL board. When that ultimately died, I went to Heinz's site and ordered one of his boards instead of rebuilding my own.

For someone new to this, it's the best out of the box option. It even has a light setup wizard for wireless, and his software is included i.e. the inverter stuff that pops up in Home Assistant after you've added ESPHome. Here is cool video of most of the process, although Scoobs ( the gent in the video ) is installing alternate software ( from Slip on this forum ).
Click to expand...

My diy one also packed up, I'm contemplating just buying one of these as well.
 
hilt_ctn said:
To build on R4zeil's response.

A while back I built my own with an ESP32 and RS485-TTL board. When that ultimately died, I went to Heinz's site and ordered one of his boards instead of rebuilding my own.

For someone new to this, it's the best out of the box option. It even has a light setup wizard for wireless, and his software is included i.e. the inverter stuff that pops up in Home Assistant after you've added ESPHome. Here is cool video of most of the process, although Scoobs ( the gent in the video ) is installing alternate software ( from Slip on this forum ).
Click to expand...
You built your own! That's so cool... I have so many questions...

Why did yours die?
How did you build your own?
Easy/Difficult??
 
I too am using Solar Assistant. Pretty happy with it, makes connecting to Home Assistant really easy and I like the fact that it's a completely separate device that can run on its own.

Greatest thing is being able to monitor my batteries in detail as I've got them hooked up along with the inverter.
 
emmahobson said:
Are you looking at anything else as well?

Would love to know if there's other options out there
Click to expand...

I'm not. The other options seem less suitable for me. You can get a raspberry pi and hat but thats 3-4 times the price so unless it serves other purposes it doesn't make sense. Then the solar assistant option just seems like duplication as I have the sunsynk dongle and already have HA for other things in the house.
 
emmahobson said:
You built your own! That's so cool... I have so many questions...

Why did yours die?
How did you build your own?
Easy/Difficult??
Click to expand...

Full credit goes to the folks over at powerforum.co.za who figured out all the nuts, bolts and code.

Why did it die ? Not 100% sure. I wrote it off to regular cheap electronics death ! The TTL-RS485 board gave up.

Wiring is as follows :

Sunsynk ESP32 Logger.png

An ESP32 paired with a TTL-RS485 board. This requires some soldering. And the R7 resistor needs to be removed from the TTL-RS485.

To connect this to the inverter, cut the head off a standard Ethernet cable. One pair of cables are connected to the TTL-RS485 board ( on the top right of pic ) and the other end ( with the connector ) goes into the inverters internal RS485/BMS port - depends on which model of inverter you have.

inv-ss-3-6kw._FxbGIYO.png

Then the ESP32 gets flashed with code from Slipx using ESPHome to do that job. Here is a video that describes the entire process. Once done, your inverter automagically appears in Home Assistant.

Easy/Difficult?? It was my first attempt at building something with an ESP. So the learning curve was a little steep like most things. But once you get stuck in, it's not hard. As a result I now have an unhealthy ESP addiction and have 9 scattered around the house performing different functions.

All that said, you don't need to build this yourself. Heinz's board does all this for you. No soldering required. It comes with his code already included. So all you need really do is plug it in and install ESPHome HA side and you're golden.
 
Neuk_ said:
I also use Solar Assistant on our SunSynk inverter.
Click to expand...
Solar Assistant is brilliant. I was a bit upset when they moved to a subscription model though.
 
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Tantus said:
Solar Assistant is brilliant. I was a but upset when they moved to a subscription model though.
Click to expand...

Yeah, I haven't looked at the subscription option, I pull all the data in to HA and manage everything there so don't use Solar Assistant for much else.
 
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