I have a solar system comprised of 4 Welion gel batteries 12v 150Ah each, 6 panels 545 watts, and a Growatt 5000es inverter.
Recently, the batteries are getting discharged fast, losing voltage under very low load (less than 1 amp at 230 volts), even with just the inverter connected to it. In a couple of seconds from charging it to 100%, it drops to 49v until reaching the cutoff voltage at 44v. I noticed that when the batteries are charging, when they reach a 100%, they remain at the floating charge at 54.5 for a couple of minutes, then they start discharging even with nothing connected or under enough sunlight and with utility charging, then the inverter tries to charge them back to the float charge and this behavior loops back again, totally weird behavior.
Link to video shows what is happening: https://ufile.io/ox8ft55s
This behavior might be why the batteries can no longer hold charge or this is happening because the batteries are bad and no longer really usable.
Are the batteries really dead or something with the inverter or....? And what can I do to save them if possible?
Recently, the batteries are getting discharged fast, losing voltage under very low load (less than 1 amp at 230 volts), even with just the inverter connected to it. In a couple of seconds from charging it to 100%, it drops to 49v until reaching the cutoff voltage at 44v. I noticed that when the batteries are charging, when they reach a 100%, they remain at the floating charge at 54.5 for a couple of minutes, then they start discharging even with nothing connected or under enough sunlight and with utility charging, then the inverter tries to charge them back to the float charge and this behavior loops back again, totally weird behavior.
Link to video shows what is happening: https://ufile.io/ox8ft55s
This behavior might be why the batteries can no longer hold charge or this is happening because the batteries are bad and no longer really usable.
Are the batteries really dead or something with the inverter or....? And what can I do to save them if possible?