Hey Guys, I have the same issues. Plus in the USB-B cable and it works for an hour or two then disconnects... I have to restart the Inverter to get it back up and running? I have changed everything but the USB Communications board on the inverter.... Who can help me in SA?
Discovered a US2000B not wanting to charge and discharging quickly, looked in the cabinet and found this liitle problem....
This battery is 4 years old, and charged via LI setup on SPF5000ES from inception!!