Hello,

The inverter is not charging the lithium battery with enough current each time the power source is available (either solar or utility),

The batter is lithium 10KWh connected through BMS to the inverter.

I have tried to double check the charge current set, and it is 30A. Meanwhile, the inverter is charging the battery with less than 10A in most of time. Barely to see it feeding +10A of current.

I have checked the main board and MPPT board, and seems like nothing wrong.

Could anyone please explain this strange behavior, or having such scenario at his end?

Thanks

Have you checked if your BMS Inverter comms are actually working correctly? If they were the BMS would auto set the charge current correctly. It probably means full BMS comms functionality is not in place.
In the absence of confirmed BMS comms it's best to set your battery type to USE or US2.
Then manually set all voltages and charge currents as per the battery's specs. Recheck your charge currents afterwards

Edited April 2, 20251 yr by zsde

Actually I have tried to remove the BMS connection to check if its causing the issue, and set the batt type to USE/US2. The result is the same

Is this something that started happening recently or has this been like this ever since you have the Inverter and Battery?

Yeah it happened recently

Thus it worked fine before that?
What charge rates did you have before that happened?
If in USE mode without LAN cable it won't charge at the set Amps, then either your BMS or Inverter may have a fault.
Check that program code 02 is set equal to or higher than code 11, else it defaults to the lower one set in 02

If in Li mode, the BMS should auto set code 02 to the battery's max charge current. If it doesn't then you have a faulty comms cable or the two are not communicating properly.

Hi again,

I've tried to debug the charging mechanism and found out that when charging the batteries using Grid input, the bulk IGBT pulses are not consistent, while it is consistent in duty cycle upon the presence of PV input,

Here's the link to the video showcasing the IGBT PWM pulses.

https://drive.google.com/file/d/1A9OHpgARE0lhlwU3FRDAYizDXfmu0W_L/view?usp=sharing