HenkVDH

Hi All, I had exactly the same issue as above. I bought 3 Pylontech US2000's and had them connected to a Voltronic (Axpert). During this time which was almost 5 years ago the battery went over voltage once or twice according to battery logs (Axpert is not great at controlling battery voltage as there is no feedback from the battery to the inverter on battery voltage (no CAN comms)).I moved over to a Goodwe inverter which controls the voltage to the batteries much better. I added another US2000 a year later and then a US3000 another couple of years later. In November last year i saw an error on the BMS and inspected the batteries. Noticed that one of the US2000's from the orginal 3 was swollen. Removed it from the rack and because of holidays it only went in to Segen January this year. Feedback from Segen was almost the same as the people above. Over voltage in the first 3 months of the life of the battery, never again after that. No other alarms until the failure in November. Segen also did not want to honour the Warranty. I also argued that the Pylontech documents says that it will protect it self against over voltage, and should disconnect or switch of the battery. If that is not the case and the BMS keeps the battery alive, they should honour the warranty as that is normal operation of the battery. If 54V is so critical then the battery must disconnect itself and wait for manual reset. All i can say from this is if you have an Axpert or Voltronic type inverter witbout the can comms to the battery and you have Pylontechs, then you probably have experienced over voltage and probably have no warranty. Very frustrating as the main reason I purchased the batteries was for the 10 year warranty.

Hi Giggsie, it is on hold at the moment. Will let you know if it changes.

It was in operation from late 2015 till middle 2019, so just under 4 years. I am inland, based in Randburg.

I am looking for 2 battery pack stacks for a US2000B or US2000 Plus. I have 2 stacks that started swelling on my US2000Plus and would like to replace them with 2 good stacks or if any one is interested to buy one stack and working BMS. If you have some old US2000's where the BMS is damaged but battery stacks are good let me know.

I am selling a RCT Axpert 5K inverter solar charger in excellent condition in box. Please see Specs in attached photo. Asking R5000 Neg.

Item: Pylontech US2000 5bay or 19 inch 12U Rack Age: 5 years Price: R1750 Payment Method Accepted: Cash/EFT FNB Warranty: None Packaging: No Condition: Excellent Location: Randburg Reason: Upgraded to Larger Rack Shipping: No Collection: Yes