ok I'll spell it out to you.
replace the word "incentive" with the words "why a customer would consider getting solar PV on the roof of their house"
originally "why a customer would consider getting solar PV on the roof of their house" is because they could generate their own electricity.
then in April 2010 the FiT was introduced and was the reason "why a customer would consider getting solar PV on the roof of their house"
(Just because the FiT was introduced it didn't mean the original reason was a bad idea nor was it going to stop them generating your own power)
in October 2011 it was announced the Green Deal was going to be "why a customer would consider getting solar PV on the roof of their house" this didn't mean you would stop generating your own power nor did it mean the FiT would stop, but it would be the reason "why a customer would consider getting solar PV on the roof of their house"
the FiT was the previous Governments reason "why a customer would consider getting solar PV on the roof of their house"
the Green Deal is this Governments reason "why a customer would consider getting solar PV on the roof of their house"
I'm not defending the Green Deal, I'm a long way from that, I'm just saying how it was involved with Solar.
when we were talking to customers Pre April 2010, all some wanted was Solar PV and didn't care about the upcoming FiT system, they were just interested in generating their own power, as before it launched the systems were £18k-£22k for a 4kW and the FiT rate was forecast at 20p, when it launched Ed Milliband surprised us all with the high FiT and the gold rush began.
until it launches in March I don't think anyone should be installing. I understand it is a long way from where it was originally, but, until it launches we just don't know what they are going to do.
Since the surprise announcement on 30th October 2011 no-one can guarantee what is going to be released in March, we can all speculate but no-one knows.
why not be transparent with your customers and just wait three months