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Funny this topic came up....I just ordered 2 DC-motor controlled solar shades for our West facing porch this afternoon. If he has a drill, a level, a friendly neighbor with 30 minutes to spare he could save himself a good bit of money. Tell him to check out the blinds.com Heavy Duty Outdoor Solar Shade.
I've been wanting to do this for years as the back of my house faces west also. Can't recommend anyone but when I used to go to the vesta home shows there was always a place or brand called Phantom screens that did them.