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Hi Tim, This is the info from their manual

Yes, it seems so, and this is in correlation to the first time the error appeared when I had on the inverter a charge indication of 42% and a reading of 49.5V on the batteries. Tim mentioned that the Polytech BMS should balance itself when charging it from an external battery charger but it...

Hi Don, yes all LEDs are on and the battery charger gives an indication of charged also, even if I think this comes from the Pylontech BMS that doesn't allow additional charge when the LEDs give an indication of fully charged. I have measured the DC voltage in the open terminals of the battery...

Hi all, I have one additional piece of information that most likely will only help to make this even more difficult to understand. I have measured this morning the voltage output of the battery array and with the indication of fully charged, I only have 51.7V. Shoudldnt the voltage of a full...

Hi, thanks for your suggestion, I need to have a look around I may have some 12V lamps lost in my garage.

Thanks for your suggestion, unfortunately I don't have any backup inverters that I can use

Yes, I have tried with all 3 individual battery racks and the behaviour is the same. If I connect any individual battery or the full battery array to the inverter even with the inverter off they came up to alarm mode immediately after pressing the red button.

Hi Tim, I got the battery charger this week and have charged the batteries. Unfortunately, the issue remains basically the same, the batteries when physically disconnected from the inverter seem to work ok as soon as I connect them to the inverter they go to "alarm" mode. At this stage, I think...

Ok, I will give it a try. Thanks once again. I will let you know the outcome.

So looking at this table this means that the BMS in the batteries is giving a wrong % value as 49.5V should give something around 10-11% and not 42% as it is right now. The green charge level LEDs are also lighting in line with the 42%, 3 LEDs are lightened if I turn on the batteries without...

Before I jump in spending more money and just to be sure... I have measured each battery module individually with a good multimeter and I got the same reading for all 3 modules 49.5V. This is also what the inverter is displaying on the screen. Is this not an indication that the voltage is...

Ok, thanks, Tim!

Any recommendations?

Just came across some details for the error on the inverter side. Well, there is a low battery entry there between others... not sure what to think anymore.

Is there any available software around from pylontech that I could use to check internal batteries logs?

Hi Timselectric, No, I don't have a way to charge them separately. About the readings, well looking at the data from yesterday it charged 2.5kW until it start giving the error. Today it is still saying that they are charged to 41%.

Everything was turned off during the night. And I have already tried to do what you described a couple of times today. What is really bugging me is the fact that if I turn the batteries on with the inverter off, I also get the protection mode triggered, but if I turn the batteries on without the...

Do you have a procedure to reset these batteries? I try to find it but apart from disconnect wait and reconnect I didn't find anything else.

Thanks for the tip Don, I have tried your suggestion and in fact, the batteries came out of the protection mode with the CAN cable disconnected but they immediately go back to it, then when I reconnect the cable they came out of the protection mode again for a few moments and the same thing...

Dear all, Could someone give some directions on what could have happened with my battery array? My system is composed of a 3000W PV array, a Growatt SHP4000 inverter and a 3x Pylontech US2000C battery array. The system was running without any issues for the last 7 months, yesterday mid-morning...