June 23, 20224 yr I have 2x og-plus5.48 inverters in parallel conected to 3x up5000 batteries if i switch the inverters off by the round grey button on the inverter the alarm 04 goes away and the batteries charge as normal but as soon as i switch any one of the inverters on it immidiatly gives me error 04 low battery but on the inverters i can see the voltage is 52v and on the batteries all the lights are on showing batteries are full
June 23, 20224 yr Might be a Comms issue related to this Service bulletin. If you don't have the latest Pylontech firmware then they advise to set these user settings: this bulletin related to the Error 61 code but the two might very well be related.
June 23, 20224 yr I have the firmware & PC software so shout if you need or want to flash the update yourself.
August 23, 20224 yr Author thanks but i got this issue resolved, it was a firmware issue, updated both firmwares and problem went away
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