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In the middle of winter, in France, the sun has a zenith at 30° with the horizon, this is its maximum height. In summer, at the same latitudes, it rises to 60°. Ideally, the panels will be installed at a 60° angle to the horizon, south-facing. Otherwise, to limit the losses, one can put them vertically against a wall, it is more interesting and less dangerous than on roofs.
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In the middle of winter, in France, the sun has a zenith at 30° with the horizon, this is its maximum height. In summer, at the same latitudes, it rises to 60°. Ideally, the panels will be installed perpendicularly to the winter sun rays, so 90°+30°=120°. They form a 120° angle with the horizon, south oriented (see scheme) . Otherwise, to limit the losses, one can put them vertically against a wall, it is more interesting and less dangerous than on roofs.
Version actuelle datée du 13 mai 2019 à 08:15
In the middle of winter, in France, the sun has a zenith at 30° with the horizon, this is its maximum height. In summer, at the same latitudes, it rises to 60°. Ideally, the panels will be installed perpendicularly to the winter sun rays, so 90°+30°=120°. They form a 120° angle with the horizon, south oriented (see scheme) . Otherwise, to limit the losses, one can put them vertically against a wall, it is more interesting and less dangerous than on roofs.
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