A house on the Hassocks side of Hurstpierpoint has its front-facing roof covered in them. I don't know what they're saving in energy bills but a local estate agent told me that as things stand they've wiped £50k off the value of their house. Puts the economics of it into perspective.
And of course you have to believe everything an estate agent says. However, even if they are right, you don't fit panels if you are intending to move in anything less than about 7 years.
Was rather dubious of the benefits of solar PV but did a lot of research and eventually had a 10 panel 2.4kw Panasonic system installed last December, costing £8.6k, although this also included an upgrade of our fuseboard. We came to the conclusion that to do nothing while utility costs are spiralling 'was not an option'.
If it helps your deliberations the figures in the first quarter as well as generating over 300kwh electricity gave us a £150 FIT payment. Plus we are waiting for the the first electricity bill to see how much our normal bill has reduced by. So far in the second quarter we are already another 500 kwh up, and inspite of the naff weather too. It is noticeable just how much faster it generates as the days got longer and the sun is higher in the sky. Watching the read outs on the little bluetooth monitor is addictive as the year progresses. I conservatively estimate that over 12 months we will generate at least 1600 kwh and around £750 FIT income. If we ever get a proper summer and autumn it should be even better than that. So the pay back will be around 10 years and quite possibly less. May even cover a replacement inverter if we are unlucky to need one.
I have to say the installer we selected was excellent not only with the installation but also the comprehensive paperwork and EON (our FIT provider) have been spot on too.
When seeking quotes I would recommend avoiding installers who send an expensive salesman along for an initial visit as this is a waste of your time and will add his fee to the quote. Only go for installers who sends a technically qualified surveyor to give you a proper written costed spec.. Apart from having the right accreditations I would strongly recommend going for an installer with a strong portfolio of past local installations and testimonials from customers. Our installer actually provided examples for us to go and inspect.
Finally we have become accustomed to having the PV panels on the roof, they are not a thing of beauty but being tucked between dormers are fairly discrete without the performance being impaired. I would seriously think about other forms of energy generation such as solar thermal or air source heating, especially if the Govt finds the money to create financial incentives.
Agree about the installers. We had three firms to quote, one of which got the postcode wrong and ended up in Reading rather than Burgess Hill! Ended up using a company in Burgess Hill, PDP, recommended by a friend and had no problem.