Solis inverter settings

That was it writing to the holding register 3051 allows me to manipulate the output of the inverter! I dropped it to 10% for a few mins as can be seen below.

https://www.boards.ie/discussion/comment/120419421#Comment_120419421

I think it's starting to make sense. I thought that a register could be treated as both input and holding depending on its purpose and what I was trying to achieve. So input register 3049 is not the same as holding register 3049?

I may have used the wrong terminology for the python code too when I said snippet I just meant it wasn't the full script I had just pulled out the lines relevant to this.

bullit_dodger

  if 0<=pwrLimit<=11000:
      modbus.write_holding_register(3051, value=pwrLimit) #set power limit %output
      x = 3051
      val = modbus.read_holding_registers(register_addr=x, quantity=1)[0]
      print(val)
    else:
      print("input out of range")

You mean like above? Just select the text and over on the left side of the "edit box" there is a paragraph marker, in there you can select code block.

https://www.boards.ie/discussion/comment/120419063#Comment_120419063

your writing to a holding register but reading from a input register, Example from my code... (also how do you get a entire codeblock to go into code snippet instead of just doing it line by line?

    if 0<=pwrLimit<=11000:
      modbus.write_holding_register(3051, value=pwrLimit) #set power limit %output
      x = 3051
      val = modbus.read_holding_registers(register_addr=x, quantity=1)[0]
      print(val)
    else:
      print("input out of range")

Ok so it's definitely the correct register as limiting to 55% on the inverter is reflected by the register changing value to 5500.

In case I'm doing something silly this is the python snippet and output returned when trying to set to 50%

modbus = PySolarmanV5(inverter[0], inverter_serial, port=inverter[1], mb_slave_id=1, verbose=0)

print(modbus.read_input_registers(register_addr=3049, quantity=1))

print(modbus.write_holding_register(register_addr=3049, value=5000))

print(modbus.read_input_registers(register_addr=3049, quantity=1))

Output

[5500]

5000

[5500]

3049 or 3050 offset by 1 seems to be the correct register on both of my 4G inverters. If I get time tomorrow I'll try as @Jonathan suggested and configure the limit on the inverter itself and see if I can find the register that gets updated.

Ive something setup using the power % on register 3051 (well thats the one Im calling) but changing 3052 as its 1 off. in the doc i have 3029-3050 is reserved.

https://www.boards.ie/discussion/comment/120415811#Comment_120415811

No idea unfortunately. Might be worth changing via the screen first and then scanning the modbus registers to see what you've changed? At least that would confirm correct register and that it takes effect.

https://www.boards.ie/discussion/comment/120401279#Comment_120401279

I've been trying to derate with

modbus.write_holding_register(register_addr=3049, value=5500)

It doesn't return an error but querying the register immediately after shows no change, any thoughts on why not?

Scoobydoobydoo101

Top class, thanks!

https://www.boards.ie/discussion/comment/120408502#Comment_120408502

https://solis-service.solisinverters.com/support/home

Click on the support ticket

I did submit photos showing the problem, (had the probes on the AC of the isolator) Had to tape the Multimeter to the inverter as I ran out of hands.

Scoobydoobydoo101

https://www.boards.ie/discussion/comment/120408366#Comment_120408366

Hi graememk, I'm having a similar issue. How do you log a ticket?

Thanks

https://www.boards.ie/discussion/comment/120403736#Comment_120403736

Had been having Grid over voltage errors on my dad's solar install, but the grid voltage was fine. Turns out the inverter was reading 27V too high,

Put a support ticket in with solis, on saturday, got a reply back this morning with a "Firmware has updated and calibration has done. Kindly observe the system"

Yep system is spot on, they used the calibration offset and set it to -27 (previous limit was -5) It must have a Modbus register.

yankinlk

Then it that case... If you want to charge all night... Change it to 10... Set charge time to 00:05 to 7:55am in winter and 00:05 to 8:55 am in summer time (ei) ... Different times if in northern ireland! Also check each provider...they might have different night rate times.

If you want to partially fill the battery reduce the rate rather than the time. Low and slow should create less heat and hopefully extend battery life.

decob

https://www.boards.ie/discussion/comment/120403437#Comment_120403437

No i only have a 5kwh battery - and on a standard day/night rate - so no ultra cheap burst rate...

yankinlk

https://www.boards.ie/discussion/comment/120400541#Comment_120400541

Depends on your goals. Mine is set low to run all night to charge but i dont have a ultra cheap 3am burst rate... I set mine to 10 and that fills me to about 5kwh to 100% over 8 hours.

Tbh i have disabled it now untill September since its basically spring time light now. But if you have a larger battery you might still fill overnight for a few more weeks.

Yeah the two pin one this is what I think it is Exceedconn EP020-1224-00 91000150

https://www.boards.ie/discussion/comment/120402018#Comment_120402018

Is that the 2 pin one? What's it called?

I'll give it a shot thanks, I've ordered the correct spec(3000:1) CT from Ali Express and ordered the Solis CT connector as a sample from Exceedconn. They are very keen to break into the Irish metering market with me as I may have exaggerated demand to obtain a sample for a reasonable price 😅 both are weeks away though.

https://www.boards.ie/discussion/comment/120401235#Comment_120401235

Yup. Its a holding register so FC3 to read, FC6 to write.

Do you need an official Solis CT? Can you get a cheaper one by just matching up the CT ratios? Don't bother with a MyEnergi clamp though. Wrong ratio.

https://www.boards.ie/discussion/comment/120397234#Comment_120397234

Yes exactly I'm already polling one inverter and will do the same with the second so until I source a CT that isn't stupidly priced I was going to attempt to derate using the python module. Would you know is the 3050 register writeable?

decob

Just recently gotten access to my inverter remotely - just looking menu items i have and where i will need to go to switch the (load/grid shifting) setting later in the month or next month to not charge the battery over night... just looking here should that charging/discharge should be that high at 96/97 ?

Screenshot 2023-03-25 at 19.12.27.png

https://www.boards.ie/discussion/comment/120396158#Comment_120396158

What is it that you're trying to do again? Dynamically derate the inverters to stick within 6kW export limit?

https://www.boards.ie/discussion/comment/120396158#Comment_120396158

No, mine were set at 110% too

https://www.boards.ie/discussion/comment/120395826#Comment_120395826

Yes you're absolutely right it's a string inverter I think I went down a rabbit hole looking for the register. It looks like I'm after - 3050 Power limit actual - I queried register 3049 and got a value back of 11000 so it currently set to 110%? Or have I got it wrong?

mickey15ie

https://www.boards.ie/discussion/comment/120394891#Comment_120394891

Thats the datalogger i have i think

https://www.boards.ie/discussion/comment/120394273#Comment_120394273

Are those registers correct? They look to be for the Solis Hybrid. From what I can recall you have a Solis String inverter?

Try the registers listed in Section 5.6 of the PDF below (note they are off by one; 3000 = 2999 etc).

RS485_MODBUS Communication Protocol_Solis Inverters.pdf

PDF sourced from here: https://ginlongsolis.freshdesk.com/support/solutions/articles/36000340158-modbus-communication-for-solis-inverters

jkforde

https://www.youtube.com/watch?v=t8NvPTfPCTs

just be careful attaching it to the socket, do not overtighten with the screw mechanism (someone on here did that by mistake)

mickey15ie

https://www.boards.ie/discussion/comment/120394557#Comment_120394557

What is the new logger and is it easy to swap them?