Posted: 20/09/2015 at 11:16
Having sited ours initially in a convenient spot for me, electricity, water access form the garage and then discovered it was always too cool on the north side of our house, we then moved it to a sunny spot facing full south and protected from prevailing winds by an inherited conifer hedge.
It is now much more productive and, at 8 x 6, far too small for my ambitions now that it works.
I would advise you to go bigger if poss and then site it where it gets full sun, especially in winter, and if that means hiding it behind a shrub or trellis panel or two, so be it.
Alternatively - do you really need all that shed and garage space? Could some be replaced by a greenhouse and thus till leave your existing garden intact?