Battery-Emulator
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dalathegreat
Supporting Growatt MOD inverters
Hi Dala!
Great effort on this, is there anyway to help out and try to add support for Growatt Inverters?
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!
Hi @dalathegreat,
I already own a set, so do you have sniffer to recommended(I think it uses Modbus RTU)?
@SelverC , Ebay/amazon/aliexpress has inexpensive (<5€) dongles you can get. Just search for "Modbus USB"
Also @SelverC , please post exact model numbers of the Inverter / Battery ! :)
@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
I'm wondering about the Growatt MIN series for the US. I'll be interested in your findings.
@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.
Following this as I recently got my hands on one of these at a killer price.
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.
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@Palmtree1455 Bought a 8000w xh version second hand for 400 EUR locally in Sweden
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!
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
@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!
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!