suncatcher

Thanks for the response. I shall check the firmware. How does one then update the software? Is there a link somewhere to download + instructions.

I recently added a Pylontech US3000C to my existing battery bank of 8 Pylontech US3000B Batteries. It is my understanding (confirmed by supplier) that they can all work together in a stack of up to 16 batteries as long as the US3000C is the master. In the process, I initially did not have the right length cables to connect all 9 batteries, so I simply replaced the original US3000B master with the new US3000C thus ending up with the 8 batteries and US3000C as master. (9th not connected yet). All working fine. Then a day or so later, I got all the right length cables and added the 9th battery to the bank (previously the US3000B master). Now when trying to synchronize them all with the SW button (US3000C still the master) it keeps running through the synch cycles and eventually I get the solid red Alarm on the master. If I exclude the 9th battery, all is fine again. Before introducing the new battery, all was working well so doubt it is now faulty. I was thinking maybe the SOC of the last added battery is different, thus causing the alarm, but not sure now. My ADD switch on master is set to On for 1 and off for the rest so the inverter can connect to the batteries. ADD switches for all slaves are off. Does anyone have some advice or guidance on what may be causing this?

Thanks. Definitely warning code not error. It all worked fine with my previous system of 2 Axpert 5kw inverters. Since upgrading inverters I got this issue.

Hi All, I am new to this forum and hopeful I can have my system issues resolved with your help. I have 2 Synapse 7.2kw Off Grid inverters in parallel connected to 8 Pylontech 3000B batteries in a parallel Master/Slave setup. The Master inverter uses the special COMMS cable for battery info/management. The issue I am having is that the slave inverter (not connected to battery management) keeps showing a different SOC than the master inverter. Both in app and on the display. I thought it was supposed to get its info from the master but clearly trying to do its own thing. Slave also consistently in an ERROR code 04 state. In the settings the master inverter is set up for Parallel operation and Pylontech battery type. Slave set to Parallel and USER for battery type as per the manufacturer's instructions. All other setting reflecting same on both inverters. Firmware recently updated to 45.07 by supplier. Has anyone come across this issue and know how to resolve so both inverters reflect same SOC and then charges batteries accordingly as 1 unit. Happy to provide further info if it helps solve this. Thanks