Hello. looking for help with a battery issue.
Installed an EasySolar II 3kVA with the above mentioned battery system and 3.6kW solar array.
All worked well for the first 12hrs but then the BMS signal was no longer received by the inverter which forced the solar reg to almost shut down.
At the same time I was monitoring the battery info via the BYD B Connect app and noticed that the "output" voltage was a few volts below the "battery" voltage with a small load on the inverter, ie 53V displayed for battery voltage and 49V displayed for output voltage. Consequently the inverter started to show low battery volts error messages.
The same readings were reversed when I tried to charge the battery via the genny. Higher output voltage than battery voltage.
This suggested that there was a dodgy connection somewhere in the wiring of the LVS top cover. Does this theory sound correct? I took the two end covers off the top and tried the tightness of all the connections that I could see but there's a lot of stuff in there that you can't get to and there's also a big rotary switch which is sealed. But could that connect fault have cussed the BMS to stop sending a signal to the inverter?
Any thoughts on the above would be great. Ive ordered a new BYD top and bottom for the battery but if that doesn't fix it I'm stumped. Sent all this to BYD a few days ago but no response so far - which is fairly normal.