I have a client with a Axpert, recently we replaced his Omnipower Gells with US2000 Pylons. Within the first week or so after installing we realised that the Axpert was charging at very erratic voltages. All attempts to adjust the Charge Voltage failed, we even involved Centurion Solar as the RaspPi was supplied by them. After some more tests we concluded that the Charge controller of the Axpert were faulty. We bypassed the system, quoted on a Victron replacement and when we went back to install, I saw that one of the US2000 were coming on, but not giving out any power. I retured the unit and received this email last night.
Normally Pylons will switch off if over charged, in this case the one unit were damaged.
I am glad to say, it was repaired under warranty, no issues at all, even though it was proven to be an external factor that caused the damage.
That in my opinion counts a lot, I am impressed by the service I received in this matter and am glad to see Pylontech backing their product.
In hindsight, it became clear that the charge controller might have caused the Onipowers to over charge as well, leading to the premature failure of that bank as well.