This can be a very complex question depending upon the choice of battery you go with and what the specific fault is.
If you have mismanaged the settings on your battery you could potentially have invalidated the warranty and as such you will have no recourse whatsoever
This is why we work with Puredrive as once the system has been setup and commissioned/registered on their servers there should be no need for you to alter any of the settings ever again.
If it then transpires there is a fault with the battery that’s covered by the warranty Puredrive will repair or replace it either with their own field based technical team or by requesting we come back out to repair/replace it.