Site & system details

So the basic site details are as follows:

Pretty standard 3-bed detached house facing almost due north, the rear roof is approximately 7.7m by 4m, rectangular in nature and faces a little east of due south. The roof has a fairly steep pitch (estimated at 45 degrees, but it may by a little more).

We're located just inside the M25 on the outskirts of London, in the South West corner of Hertfordshire, not too far from Watford (probably the most well known place in the vicinity).

The proposed system is a 14 x 245w panels, creating a peak output of just under 3.5kW.