Ok - Ideally, we'll get some first hand posts coming in - but to get things started, i came accross a great article by Ashley Seager on the Guradian website about his first years experiences of running a PV installation.
Some of the keypoints are:
Date of installation: April, 2007
Installation cost: £17,000 (of which 50% was recd back in the form of grant) - Ashley points out that the cost has now come down to around £9000k, however grants are now capped at £2500
PV's generated 92% of household electricty usage over the year
Installation prompted a change in the family attitude towards energy usage
You can see the entire article
here
