That's going to be one
Powerful Power Shed!!
I can't wait to see the finished product!!
The angle is pretty easy to get set up. Just don't build the angle adjustments
ahead of time, like I did with my fixed mount! (Too many un-needed positions).
At about 10 or 11 AM, (or 1300 to 1400 PM), place an 'L' corner (or 'T' square)
on the side of a panel, and look at the shadow falling on the panel.
If it's falling near 90 degs across the panel, that's it! (Well close).
Oxford Station?? in the UK??
Use this...
UO SRML: Sun chart program
to make one of these.. (This one is mine, don't use it)!
45 degs was a good starting position for me..