Ken wrote: ↑Thu Aug 08, 2024 5:29 pm
I know you can add to a FITS system but one cannot replace, can one.
Hi Ken, that's exactly what I've done recently, by replacing the 5x 235Wp 2011 FiT panels on my lower ESE roof with 5x 440Wp panels (and also +2.12kWp new ground mount).
I can confirm that I've had confirmation (many times) over the years that this is absolutely fine, but due to final commissioning issues with the batteries that were also part of the change, I haven't yet completed the notification/change with EDF (my FiT provider). But once complete I'll update the issue on Camelot, and send you a PM (if you want), just to confirm it's all OK.
Going forward, for FiT purposes, EDF will apportion generation based on the original FiT system size v's the new revised system size.
EG, it was 3,580kWp, and now it will be 6,725Wp, so payments will be based on generation x (3,580/6,725).
Edit - Bear in mind that you may want to move the export part away from FiT's and to a payment based on actual export, since you would get nothing under the FiT scheme for any extra export, as it will still be 50% deemed based on the apportioned figure.