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thomasfa18 / solar-sungrow

Monitor sungrow inverter over LAN modbus and upload to pvoutput.org
GNU General Public License v3.0
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modbus specification #2

Closed rpvelloso closed 3 years ago

rpvelloso commented 3 years ago

Hello,

I have a SG4K, where can I find the modbus specification? Thanks.

Hantuch commented 2 years ago

Very sorry for necro'ing, but @rpvelloso have you found the modbus specifcations? also is the register map in this repo still valid?

rpvelloso commented 2 years ago

@Hantuch I have a PDF from sungrow with specs for my model's family. Hope it helps. TI_20190704_Communication Protocol for Residential Single-phase Grid-Connected Inverters_V10_EN.pdf .

thomasfa18 commented 2 years ago

See above. I lost protocol access to my inverter over wifi after a firmware update so can no longer actively develop this.

Hantuch commented 2 years ago

@Hantuch I have a PDF from sungrow with specs for my model's family. Hope it helps. TI_20190704_Communication Protocol for Residential Single-phase Grid-Connected Inverters_V10_EN.pdf .

Thank you so much!, may I ask how'd you acquire this? I heard Sungrow is not quite cooperative in sharing their product register map

See above. I lost protocol access to my inverter over wifi after a firmware update so can no longer actively develop this.

I plan to use its RS-485 Modbus RTU instead of wifi/ethernet to replace a Solarlog 50, have you tried using RS-485 instead of wifi?

Update: After a quick-read the official register map seems to be similar with the one listed here, fingers crossed it'll still works, (is it? I'm kind of anxious 😟 )

thomasfa18 commented 2 years ago

Yeah. The copy I got was from sungrow support. They stopped providing it though.

thomasfa18 commented 2 years ago

have you tried using RS-485 instead of wifi?

My model inverter didn't provide this natively. Good luck. It should be fine for you.

Hantuch commented 2 years ago

My model inverter didn't provide this natively. Good luck. It should be fine for you.

Mine was SG40CX, pretty big, that one 😃

@rpvelloso does the map still works for you until now??

Edit: Oh I'm sorry, was asking @rpvelloso about whether the map still functions

rpvelloso commented 2 years ago

I have a SG4K and it's working fine. A while back they updated the fw and closed modbus port, I've lost access for about a week and then it was reopened, don't know why they did this but it is working fine since then. I got my PDF from sungrow support in Brazil, I wrote them asking for it because I've bought an inverter advertising a modbus interface that I intended to use, otherwise would return it to the seller. They can't just "erase" a feature that is advertised and documented in the user manual AFTER you paid for it, right?

Hantuch commented 2 years ago

I have a SG4K and it's working fine. A while back they updated the fw and closed modbus port, I've lost access for about a week and then it was reopened, don't know why they did this but it is working fine since then. I got my PDF from sungrow support in Brazil, I wrote them asking for it because I've bought an inverter advertising a modbus interface that I intended to use, otherwise would return it to the seller. They can't just "erase" a feature that is advertised and documented in the user manual AFTER you paid for it, right?

Yeah!, but I fear they got wise since the term "modbus" is nowhere seen on their website & datasheet now 😄 , at best only "RS-485"

Btw which protocol you used? Modbus TCP or RTU (RS-485)? Is it possible to run both (rs-485 & tcp simultaneously?

Oh and after digging (read: quick search) I found another repo with more up-to-date document (by 2 years, July 2021), maybe this'll help

https://github.com/mvandersteen/SungrowInverter#hybridstorage-inverters---inverter-that-support-a-battery

It's in the docs file