Is anyone familiar with the shop in link below, and if so, what is the service like?

https://thepowerstore.co.za/products/pylon-up5000-4-8kwh-li-ion-solar-battery-48v?variant=32791453401150&country=ZA¤cy=ZAR&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gad_source=5&gad_campaignid=809886143&gclid=Cj0KCQjwnJfEBhCzARIsAIMtfKJKp3-beJViPqdv4TJaEzs0ZT_OUrmWwKEpCqEfxK05pNNkdiKkdg4aAuH9EALw_wcB

I have 5 Pylontech US3000C batteries on a Sunsynk 8kw inverter, after 5 years one gave an error code and on removing it was swollen. have extended warrantee for 10 years. Took it in to Solardeity in Johannesburg after a month was told "the battery is swollen due to exposure to high voltage. Unfortunately, this type of damage is not covered under warranty, and as such, the warranty is void".

Other 4 batteries are still working fine, either their BMS failed leading to high voltage or Sunsynk decided to send high voltage to batteries only affecting one in the middle of a 5 bank set.

The warranty is not worth much, buyer beware.

Edited August 6, 20251 yr by lancelot
Typo

1 hour ago, lancelot said:

I have 5 Pylontech US3000C batteries on a Sunsynk 8kw inverter, after 5 years one gave an error code and on removing it was swollen. have extended warrantee for 10 years. Took it in to Solardeity in Johannesburg after a month was told "the battery is swollen due to exposure to high voltage. Unfortunately, this type of damage is not covered under warranty, and as such, the warranty is void".

Other 4 batteries are still working fine, either their BMS failed leading to high voltage or Sunsynk decided to send high voltage to batteries only affecting one in the middle of a 5 bank set.

The warranty is not worth much, buyer beware.

Warranties is what they use to pull you in to buy a product. It is funny when people use that as a decision to buy something as it almost always never gets honored

I am in the same boat, I have four Pylontech (US3000) batteries installed by an accredited installer.  I am using Deye Hybrid inverter, and my understanding is that the BMS is controlled by Pylontech.

I started getting alarms, and battery not holding its charge. I contacted Pylotech, they directed me to SolarDeity for evaluation/ repairs. The oldest battery is swollen, the second oldest battery has started swelling, (they have worked well for 4 years). Pylontech have gone silent on this warranty repair. After numerous follow-ups, they claim that the batteries are out of warranty and not registered, yet it is registered with a registration number form Pylontech (10-year warranty). SolarDeity has also confirmed that it is under warranty.

Then they asked why I brought them the battery and not the installer, therefore it is not covered. They also said that I should return it to the company that we bought it from, yet Pylontech instructed me by e-mail instructed me to take it to Solardeity in Wynberg. 

They have also stated that they cannot read the battery logs, and they are probably looking for another reason not to honour the warranty.    

In my opinion, Pylotech are look for reasons not to honour their warranty and their warranty is not worth the paper it is written on.  Buyers beware…..