I don't think the C rating is going to be as bad as what people expect.
I think PV is going to be very closely linked to the Green Deal.
We shouldn't be thinking 'No way that house will be a C or above'.
Got to think about the extra work that can be done 'at no upfront cost' to the customer to get them up to a C to get the best rate on the PV.
Time to start networking with other companies in your areas that will already offer these services.
Can't you just hear the excuses now for not hitting their target.
Reply to the thread, titled "C rating" which is posted in Solar PV Forum | Solar Panels Forum on Electricians Forums.