How much did the system cost?
Note you can now get a 135W panel for £190, which is some indication of the falling cost over the last 24 months - the 50W Kyocera panel is now £80!
Other bits were a Morningstar SunSaver solar regulator SS10 and a Nasa Clipper BM1 Battery Monitor (unnecessary extravagence - don't bother!). I also added a couple of 12V fluorescent lights powered from the SS10 so I didn't need the inverter running just for light.
It's a pretty simple set up, the hardest part is making up the high current battery cables - the clamps, fuse holder and connector to the inverter are pretty substantial to handle 100A.
I mounted the panel on the roof of the Apex shed with simple aluminium brackets. The wiring is pretty simple (more complicated by the battery monitor which has a 100A shunt resistor in the negative lead to monitor the load current).
I uploaded a pictorial wiring diagram at http://i.imgur.com/UX4Y29o.jpg?1 for you.