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Posted

Hi folks,

My system uses 3 Growatt 5000es inverters in three phase mode with 9 Pylontech US3000C batteries.
The inverter works in SBU mode (Solar->Battery->Utility). In the mornings all solar power charges the battery and the house uses the grid (instead of using solar for the house and the remaining power for the battery charge). This is clearly a firmware bug, as if I turn off the grid input, the inverters stars working as it should (using solar for the house loads and charging the battery with remaining power). Here is clearly shown:

image.png.18271f2e4daf208e63d6aea41c8eb341.png

And after switching off the grid for 5 seconds and then turning it back on, it works as it should:

image.png.ff4597198b5e091aaf5f2b7be85b5306.png

Another bug that I experienced is - non working solar only charger (settings 14 set to OSO). In the middle of the night when the battery is drained, it starts charging it from the grid.
However this bug I managed to fix by setting hours for utility charging (setting 49 set from 11AM to 13PM).

My firmware version is 040 04 301 / 041 04 301.
Does anyone know what is updated in the newer version 05 and 06?

 

Thanks!

 

 

Posted

It is weird to see how many of these inverters do not work correct as per the settings.

The only bug I find is that the maximum charge from grid is not working as it should by charging at a lower rate of charge.

Posted (edited)
On 2022/04/10 at 10:38 AM, Scorp007 said:

It is weird to see how many of these inverters do not work correct as per the settings.

The only bug I find is that the maximum charge from grid is not working as it should by charging at a lower rate of charge.

What is your firmware version? I don't have a problem with max charging. It is charging with up to 65A (peak) my 48V pylontech batteries. The manual says the max is 100A but depends on the batteries as well (and the sun).

UPDATE on my issue: I was told this is a firmware bug that is being fixed in the new 05 version. However I'm too scared to flash it right now. Will wait until I get another SPF 5000 inverter as backup if anything goes wrong 

 

UPDATE 2: I flashed 06 firmware to all 3 of my growatt inverters and the bug is still present..I'm trying to contact gorwatt support without a luck 

Edited by Deyan Vitanov
Posted (edited)
7 hours ago, Deyan Vitanov said:

Here is a video of the bug 

 

@Deyan Vitanov

Your setting 13 is the default 95%, you have to change it to the lowest your inverter will allow. Mine is set at 30%

Currently your inverter is trying to get your batteries to 95% before switching back to battery. 

Edited by Buyeye
Posted
8 minutes ago, Deyan Vitanov said:

Thank you @Buyeye

Today I lowered it to 25% and Tomorrow morning will see if it works

@Deyan Vitanov please bear in mind that it will take a little bit of time for your batteries to go from 20% to 25 %.

I have a timer set to run my geyser heat pump after 9 am which usually gives the inverter enough time  to switch back to battery before the heavy loads start. I also tell the rest of the family to wait for 9 am before running washing machines and the like.

  • 2 months later...
Posted
3 hours ago, jeremyF said:

Does anyone know as to why I cannot change b2AC to lower than 50%? I am using LI in Prog 5 and it is using LiFePO4 battery..

 

What is your AC2b setting on? You cannot set the one lower than the other.

  • 1 month later...
Posted

@BuyeyeI have the same issue. Can you please explain how setting No 13 to lowest possible fix this please. Just for education purpose. In the user manual it says No 13 is "Setting SOC point back to utility source when selecting SBU priority or Solar first in program 1". Our problem is even in SBU mode solar is not powering the house as first priority but it charges the battery. 
Sry if this is a stupid question. I'm new to this.

Posted (edited)
On 2022/08/26 at 8:16 AM, ravindasenarath said:

@BuyeyeI have the same issue. Can you please explain how setting No 13 to lowest possible fix this please. Just for education purpose. In the user manual it says No 13 is "Setting SOC point back to utility source when selecting SBU priority or Solar first in program 1". Our problem is even in SBU mode solar is not powering the house as first priority but it charges the battery. 
Sry if this is a stupid question. I'm new to this.

@ravindasenarath13 is back to battery which is set by default to 95% which means your inverter tries to use all avaliable solar to charge the batteries to almost full. Depending on season, amount of panels and size of battery this can take the whole day.

That's why oversizing the panels is recommended. 

If you have the bms cable connected and working you can try set 13 to the lowest percentage your inverter will allow.

I don't know the details of your setup but it sounds like you have a good size battery and maybe winter angles are affecting your pv production. 

Screenshot_20220828-075630_Acrobat for Samsung.jpg

Edited by Buyeye
Posted

@ravindasenarathSet Prog 21 to 10% and then you can set Prog 12 to anything above 10%. The limiting factor is Prog 21. If you are using Li battery, the protocol should be correct and you should set prog 5 to Li and 36 to whatever protocol, specified by the manufacturer of the battery. My contact # is 773124844 and call me if you are in Sri Lanka and I can try to help.

Posted

@jeremyF @Buyeye Thanks for the explanation guys. I got the idea now. 

In my case I set setting 12 to 50% since I keep rest of the battery in case of a power cut. First time I made a bit of a mess because I set setting 49 to 1015 since I wanted utility to charge battery only if it couldn't charge by solar. But I didn't realize that utility wouldn't charge battery when there is even small solar present. What happened was in a gloomy rainy day solar couldn't charge the battery so it was around 55% by sun set and even though load didn't use battery beyond 50% it seems like inverter has run on battery during night. When I got up in the morning there was a battery SOC too low warning in inverter with beeps. Later I realized I have set the setting 49 wrong so I change it to 2005. So during day house will powered by solar and excess will charge the battery and even though it couldn't battery will be kept at 50 - 52% ( my setting 13 is 52% ) during night. 

  • 2 weeks later...
Posted

Hi. I have just read this post, and i am experiencing something similar. 

What I want to acheieve is have the solar power the house and charge the battery during the day. At night, i want to recharge the battery from the grid in the winter months as this is done at a cheaper tariff.

So from 2-7am i want to charge the battery to 50%. During the morning and on cloudy days the house will then drain the battery, and recharge will start again that night. 

In summer months i can change this setting to not charge during the night as battery will charge to 100% during the day and carry it through. This worked during summer, but now in winter months when i set to charge through the night it does this, however durning day it does not revert back to draining from battery, but continues to use the grid to power the load the whiole day.

 

Can someone please recommend correct settings as i thought my setting were correct, but seemingly not. 

Settings i have are 

49 - 0206

12 - 10%

13 - 50%

Posted

Hi, same issue, firmware seems up to date version 06 X

Growatt support... hum ? no reply

If anybody as solved it (2x Pylontech US3000) in my case, please share your settings when you solve ..

I change 12 and 13 parameters this evening.. i hope it' solve 

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