I've had a 1.84kW solar PV system installed onto my SE-facing roof.
It looks just like this: -
And here's a more "arty" picture, capturing the Sun's "rays": -
As of 2010-08-28_1500 I am generating my own electricity and exporting it to The National Grid! My electricity meter literally started to go backwards in the daytime... It didn't take the supplier long to replace the meter with one which won't go backwards - the swines!
As of 2010-10-15 I am taking advantage of the Feed-In Tarrif scheme.