Greetings,

I have a Deye 8kW inverter connected to 2 x 8.2kWh BSL Stubby (160Ah) batteries.

Values displayed on the Li-BMS screen are testament that the inverter is communicating with the master battery. 

However the 120A charge current limit and 140A discharge current limit on the Li-BMS screen seem to be that of one battery and not two in parallel.

How do I tell that the slave battery is communicating with the master? Solarman web app does not list the two batteries and their BMS.

The DIP switches on the master and slave are appropriately set to 100000 and 010000 respectively.

12 hours ago, Kilowatt Power said:

Greetings,

I have a Deye 8kW inverter connected to 2 x 8.2kWh BSL Stubby (160Ah) batteries.

Values displayed on the Li-BMS screen are testament that the inverter is communicating with the master battery. 

However the 120A charge current limit and 140A discharge current limit on the Li-BMS screen seem to be that of one battery and not two in parallel.

How do I tell that the slave battery is communicating with the master? Solarman web app does not list the two batteries and their BMS.

The DIP switches on the master and slave are appropriately set to 100000 and 010000 respectively.

Hi Kilowatt

Is the battery link comm cable connected between the 2 batteries?

4 hours ago, Leshen said:

Is the battery link comm cable connected between the 2 batteries?

Yes on port 4 of the parallel RS485 right ports. I'll try another RJ45 patch cable on RS485 port 5.

Should Li-BMS display combined parameters of the two batteries in parallel i.e. 320Ah and 185A charge/discharge current?

4 minutes ago, Kilowatt Power said:

Yes on port 4 of the parallel RS485 right ports. I'll try another RJ45 patch cable on RS485 port 5.

Should Li-BMS display combined parameters of the two batteries in parallel i.e. 320Ah and 185A charge/discharge current?

Try both ports at the end. Correct. It should indicate the combined charge and discharge currents. 

3 hours ago, Leshen said:

It should indicate the combined charge and discharge currents. 

Problem solved by replacing the patch cord linking the two batteries.

The discharge current limit displayed on Li-BMS is now 280A up from 140A. The charge current limit remains at 120A which is still perfect.

Thank you for your assistance @Leshen

1 hour ago, Kilowatt Power said:

Problem solved by replacing the patch cord linking the two batteries.

The discharge current limit displayed on Li-BMS is now 280A up from 140A. The charge current limit remains at 120A which is still perfect.

Thank you for your assistance @Leshen

Anytime. Glad to help

I have 2x 7kw bsl paralleled with 5kw sunsynk. The problem is after they installed it my soc remains on 48 %. Although the batteries is charged. Is it the comms cable between the batteries? From the main battery they used the rs485Can port, but with the second battery they used the rs485 to rs485 on main battery? 

I assume something is not communicating 

2 hours ago, Marius snooke said:

I have 2x 7kw bsl paralleled with 5kw sunsynk. The problem is after they installed it my soc remains on 48 %. Although the batteries is charged. Is it the comms cable between the batteries? From the main battery they used the rs485Can port, but with the second battery they used the rs485 to rs485 on main battery? 

I assume something is not communicating 

That sounds like they are communicating, but one battery is disconnected. Check the wiring and breaker on both batteries.

2 hours ago, Marius snooke said:

I have 2x 7kw bsl paralleled with 5kw sunsynk. The problem is after they installed it my soc remains on 48 %. Although the batteries is charged. Is it the comms cable between the batteries? From the main battery they used the rs485Can port, but with the second battery they used the rs485 to rs485 on main battery? 

I assume something is not communicating 

Check the dip switch settings on the batteries. It should be 10000000 on the master and 01000000 on the slave. If you need to change them make sure you restart the battery after.