Yup, the resizing and orientation you need to figure out for yourself...
A couple of hints:
For the textures, either make it the same proportion as the surface, and import with same measurements as the surface - or more professionally, spend some time with a graphics editor and make a small seamless tile. Low resolution will usually do nicely e.g. 256x256 px or less for seamless.
As for the rotation of the solar panels, remember you can rotate the object by single degrees by pressing SHIFT when importing. That way you can get the panels correctly angled towards the sun - whichever latitude you may want to use for construction.
Best of luck!
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