Associate
- Joined
- 22 Dec 2010
- Posts
- 771
- Location
- West Midlands
83.6 kWh.
100% I went out and had a look the sun wasn't even close to being sideways on the house.It looks like shading to me, are you sure there is no shading, I thought you had a chimney stack? It wouldn't take much shading, only one panel partially shaded will pull the string down a bit.