So I had my installer come out to do a check of our panels and they tell that they all failed, even though they are still producing. So they are replacing them all and the inverter under warranty - they are 6 years old, 25 years warranty on the panels but only 5 on the inverter - they tell me that the new panels will need a different type of inverter which is why they are replacing it FOC.
Very happy that I paid extra to go with a reputable installer rather than a fly by nighter.
Panels are 250W Trina and the inverter is a 5kW Aurora
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