DarrenNock

Good Day, I have installed an Axpert 5kva inverter with 4x100ah gel batteries with a changeover switch, fuses for the batteries and a 2 breaker for the supply to the inverter at a customer. I got a call from the customer saying the inverter was smoking and this was when there was still normal utility power coming into the customer house. There wasn't a surge from utility either. The supplier has turned around and said it's a 'sudden oveload' and it has burnt the overload protection on the into and is now not will to replace it even though it is still under warranty. My question is, If there was a 'sudden oveload' then why did the inverter not alarm for a couple of seconds (as I understand and seen them do) and then switch off to protect itself and the load going into the customers house. Your help on this will be greatly appreciated. Darren