Photovoltaic cells. I think.

The solar panels are up! I am informed by dad they're actually called photovoltaic cells, however I'm not convinced I'm spelling it correctly so I'm sticking with solar panels. It's quite fun going up on the scaffolding to have a look, you don't expect to be able to sit on your roof normally! And the view is beautiful, I think I can almost see Salisbury Plain but it's hard to say...