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RE: Solar Power as an Alternative Source of Power in Africa (Some Pictures of a Friend's Installation Which he did this Past Weekend)
depends how far from the equator one is. The solar zenith angle (angle of inclination of the sun) varies depending on time of day and also time of the year. The further from the equator one is the more extreme this angle is. If you are on the equator the best angle for an average daily exposure is 0 degrees.
Good point yeah hadn't thought of that, insightful!
nathenial, we are quite close to the equator here, hence the choice of angle of tilt chosen for this fixed system.