Growatt 6000 ES Plus not charging from grid when solar connected

[chrisp831]

I will apologize in advanced if this topic has already been discussed as I did thoroughly search.

As the title states, I have a Growatt 6000 ES Plus that I have recently installed.

I am seeing some strange behavior while attempting to charge from the grid.

With setting SNU or CSO the inverter will not charge from the grid no matter how low the solar voltage is. Example, currently solar panels are only producing 200watts, and the JK BMS is calling for a charge (RS485) but the inverter will supply no charge. If I disconnect the inverter from PC's, it will start the grid charge. (without RS485, same symptoms)

This is becoming an issue because I live in an area that has many blackouts and want to ensure the battery bank is fully charged at all times.

My settings are as follows:
01 - SUB
02 - 100A
05 - LI
11 - 80A
12 - 20%
13 - 90%
14 - CSO

Float Voltage and Bulk Charge is being handled by the BMS communication to inverter.

Any help or ideas to test would greatly be appreciated.

Thanks!

 

[AshleyL]

Your greatest mistake is to use the JKBMS Inverter BMS communication mode.
Go read the other thread about it.
Problems :

1. negative SOC drift issue at JKBMS
2. Growatt inverter itself with 95% - 100% charging algorithm
3. "fake" 100% SOC from JKBMS from one cell reaching SOC100%Volt value which causes the inverter to stop charging immediately.

 

[chrisp831]

Your greatest mistake is to use the JKBMS Inverter BMS communication mode.
Go read the other thread about it.
Problems :

1. negative SOC drift issue at JKBMS
2. Growatt inverter itself with 95% - 100% charging algorithm
3. "fake" 100% SOC from JKBMS from one cell reaching SOC100%Volt value which causes the inverter to stop charging immediately.

Yes I agree with you. I am starting to see some major issues. I plan on disconnecting the communication once I solved the issue with not charging with grid when solar is connected as it seems more important to me and I’ve already ruled out the BMS communication has no impact on this.