Supporting Growatt MOD inverters

[SelverC]

Hi Dala!

Great effort on this, is there anyway to help out and try to add support for Growatt Inverters?

[dalathegreat]

Hi @SelverC ,
To start integration with a new inverter/battery type, logs need to be taken from a working system. So, get a CAN / Modbus sniffer, and visit a place that has a Growatt+battery working, and start collecting data!

[SelverC]

Hi @dalathegreat,

I already own a set, so do you have sniffer to recommended(I think it uses Modbus RTU)?

[dalathegreat]

@SelverC , Ebay/amazon/aliexpress has inexpensive (<5€) dongles you can get. Just search for "Modbus USB"

[dalathegreat]

Also @SelverC , please post exact model numbers of the Inverter / Battery ! :)

[SelverC]

@dalathegreat
Inverter: Growatt MOD 8000TL3-XH
Battery: Growatt ARK-2.5H-A1 with Growatt BMS BDC 95045-A1

Also I will try and use my already existing https://www.waveshare.com/usb-to-rs485.htm and see if it works to sniff with it

[Palmtree1455]

I'm wondering about the Growatt MIN series for the US. I'll be interested in your findings.

[edmundasa]

@SelverC any progress on those logs? I'm considering this inverter as I can get it cheaper than others. Fingers crossed that you can get them. Thank you both.

[Palmtree1455]

I think I'm going to try the solis s6 instead.

[tmlarsson]

Following this as I recently got my hands on one of these at a killer price.

[Palmtree1455]

Where did you find the killer price?

…

On Tue, Mar 26, 2024, 9:16 AM tmlarsson ***@***.***> wrote: Following this as I recently got my hands on one of these at a killer price. — Reply to this email directly, view it on GitHub <#156 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGCBB76VEVWABNXZEBCJCN3Y2FYKRAVCNFSM6AAAAABC2HG7DWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMRQGU2TCNBUHA> . You are receiving this because you commented.Message ID: ***@***.***>

[tmlarsson]

@Palmtree1455 Bought a 8000w xh version second hand for 400 EUR locally in Sweden

[SelverC]

Hi Guys :) I have changed plans and inverter and battery are already sold.
So I will not be able to produce some logs for it, sorry!

[tmlarsson]

Think I maybe have found a protocol specification for these inverters.

Growatt PV Inverter Modbus RS485 RTU Protocol v120.pdf

From this project that looks very interesting!

https://github.com/ai-republic/bms-to-inverter?tab=readme-ov-file

[dalathegreat]

@tmlarsson Looks like 48V Modbus registers, would be better to get a High voltage communication log from a running system. Without that, it's almost like guessing everything!

[dalathegreat]

To continue with the Growatt integration, we need logs from someone that has a functional Growatt + Growatt ARK battery setup. If we get those logs, we can start to develop support for Growatt emulation. Please let us know if you know someone with a "ARK XH Battery System(7.68kWh 25.6kWh)" battery willing to log!