actually it is best to take a drive there in the morning, and in the evening, to see exactly where the sun hits. also, do note that the angle of the sunlight changes every 6 months, so you might not have evening sun right now, but you might after a few months.

the unit directly opposite mine gets direct evening sun. they have put in some sort of sponge insulation covered with aluminium foil over the WHOLE window to block the heat. looks horrible but in theory should work right? anyway its not them who has to look at it, its me