OP
FB.
Yes you would lose your FIT if you changed your panels as a new MCS certificate would need to be produced meaning you'll be put on the currrent 15.44p/kWh.
So does that mean any system which needs repairs of any kind will automatically drop onto the then-current FiT band?
If so, there will be a lot of people who get a far lower total payback than they were led to believe - some may not break even.