Download of optimizer data

[Paco93]

Hello, thanks for the great Software you provided us. I have a SUN2000-3KTL with smart PV optimizers. I was wandering how the data from the optimizer could be downloaded and made available. Regards

[basking-in-the-sun2000]

Huawei doesn't give all the details on how to download the optimizer info. They said it is proprietary. Their modbus reference manual, gives some hints, but not enough info

[madimadi]

Hi. I believe there is a section 4.2 in interface definition document 2021-08-13 about real-time data query of optimizers.

Would you consider adding support for it? Regards, madimadi

[andysu]

not so, some basic info you may read from registers (only from m3 inverters)

• Total number of optimizers
• Optimizers Online
• Optimizer Feature data

this additional info - only thru fusion solar and 3rd app

1. Basic
   • SN
   • address
   • string N
   • pos in string
   • FW ver
2. Realtime
   • Alarm
   • Input current, voltage
   • Output current, voltage
   • temperature
   • status
   • Power
   • voltage to ground
   • accumulated energy yield

[madimadi]

Sorry I'm not sure still. You say real-time data cannot be read only basic and basic can be read only in M3. Not in smaller inverters ex: M1?

[andysu]

sorry - bad markup in my post fix. M1 inverter - please send model and FW info

[basking-in-the-sun2000]

Some inverters do not use optimizers. Still, it would be great, but section 4.2(?) doesn't provide enough info to download the optimizer info. It is really a bad move from Huawei not allowing us to access that info :<

Have the impression you need to login to the inverter to access that. The remote monitors don't need it, since the inverter pushes the data out.

[andysu]

imho some data can be downloaded (func 0x44 and 0x41 is the same) without auth process I did not find any information that it is possible to organize the authentication process through modbus I have not yet been able to download data from the inverter. But I'm trying. I was able to decipher some EMAP files. without huawei info In general, the topic is very interesting. So you can download a lot of information about the operation of the inverter. I propose to combine efforts.

[andysu]

I read your correspondence on the forum Hua about download optimizers info from inverter.

[basking-in-the-sun2000]

sounds interesting. If I can help, let me know

[andysu]

Thanks, friend. After war. I'm in Ukraine

пт, 25 лют. 2022, 11:30 користувач basking-in-the-sun2000 < @.***> пише:

sounds interesting. If I can help, let me know

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[basking-in-the-sun2000]

Stay safe and hope this madness is done soon

[andysu]

thanks again

вт, 1 бер. 2022 р. о 01:52 basking-in-the-sun2000 @.***> пише:

Stay safe and hope this madness is done soon

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[andysu]

some updated info Huawei added information about optimizers 4.1 Obtaining the System Information of Optimizers according to this information, I was able to write with an application that reads optimizers (live and history)

[basking-in-the-sun2000]

some updated info Huawei added information about optimizers 4.1 Obtaining the System Information of Optimizers according to this information, I was able to write with an application that reads optimizers (live and history)

Excellent!. Would you mind sharing the updated documents and if you have sample code.

[andysu]

Updated documents - OK (pls send me your email address for file) sample code - not right now (its my commercial property) maybe later.

[basking-in-the-sun2000]

Updated documents - OK (pls send me your email address for file) sample code - not right now (its my commercial property) maybe later.

No problem. The docs will do.

[andysu]

the main question there is in using the 0x41 function. It does not work on the standard libmodbus library. I had to rewrite the code. And without using the 0x41 function, you cannot get data from the optimizer.

[andysu]

the libmodbus standard library has support for custom functions, but it does not work on modbus RTU. and I can’t post the corrected code yet (commercial obligations)