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ai-republic / bms-to-inverter

Use, monitor and control any battery brand with any inverter! Application to read and monitor data from BMSes and write data to an inverter using any protocol (e.g. UART, RS485, ModBus or CAN)
https://github.com/ai-republic/bms-to-inverter
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support for Solis Inverter with Sacred Sun lithium Battery #37

Open jan-dane opened 2 months ago

jan-dane commented 2 months ago

Hi. Nice work helping needy people.

I need help in connecting Sacred Sun Battery (SCIFP48100 model) having only RS232 and RS485 ports with Solis Hybrid inverter 6KW (S6-EH1P6K-L-Pro). But the inverter communicate through CAN port only for BMS. How to connect battery RS485 port data to Inverter CAN port? .. please help.

Sacred Sun Battery Specs: https://www.sacredsun.com/uploads/soft/221111/1-221111152351.pdf Manual: https://www.sacredsun.com/uploads/soft/201211/1-201211100Q0.pdf

Solis Inverter compatible battery data: https://www.solisinverters.com/uploads/file/Solis_Leaflet_Battery_matching_S6-EH1P%283-6%29K-L-PRO_V2%2C3_202406.pdf

Solis Inverter Mannual: (page # 24~27) https://www.solisinverters.com/uploads/file/Solis_Manual_S6-EH1P%283-8%29K-L-PRO_EUR_V1%2C1%2820240311%29.pdf

Solis Inverter with batteries communication : https://solis-service.solisinverters.com/en/support/solutions/articles/44002484785-communication-ports-for-battery-connection

ai-republic commented 2 months ago

Hi, I would need the RS485 communication protocol specification for the Sacred Sun BMS. The Solis understands the PylonTech CAN protocol so that's no problem.

To setup a system with this application you will need a Raspberry PI with a RS485/CAN hat.

jan-dane commented 1 month ago

Thx for reply... I don't know exactly about the RS485 communication protocol specification for the Sacred Sun BMS. However, battery can be connected/accessed with PC via RS485 USB converter (as shown in attachment) with following BMS softwares in window10.

https://energytalk.co.za/uploads/short-url/6i0wuNTGFnHFxXLpCFh1D2EIZbl.zip

http://www.crystalradio.cn/forum.php?mod=attachment&aid=MTY0MjYxMDl8ZTJhOTcwZTV8MTcxODQzNTg3OHwwfDIwODk0NjA%3D

PC Connection setup: https://www.youtube.com/watch?v=IOAFlZLxnPE

RS485 to USB Converter

jan-dane commented 1 month ago

Another software checked working with the same battery.

https://ucca98f13d7d95569659bd8b52f4.dl.dropboxusercontent.com/cd/0/get/CUXcyIOqGSh3JIbVUO9HHQ7iAnENCS63EgUCgwH1-DmMIFAFE6HDO89tw-jRVjGUyEKPRNw5OMuQDmWzaDp0tajW2fEJgi_79oCzZ4EAVc-3JTYuxIzwi78i-ZKAhIbo3s5AnfdUo34vJ8N6KeNIvYfi_fgTd6qQImPQYluFkJlMtg/file?_download_id=6296857176032198077251404144398358272023653671255062195367987459&_notify_domain=www.dropbox.com&dl=1

ai-republic commented 1 month ago

Ok, after a little (or long) research I found out that your BMS seems to be a rebranded Tian Power BMS that seems to use the same RS485 protocol as the EG4 LiFePower battery packs. What I've found so far is a crude implementation and some reverse engineered documentation on the protocol. I did find a EG4 LiFePower RS485 protocol which some comments believe it to be buggy but that would be a starting point. There is also a user @TianPower here on Github who might help if you give him the serial number of your BMS and send you the RS485 communication specification.