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am i stupid or are solar panel's efficiency independent on latitude
(discuss.tchncs.de)
Consider the following drawing:
I take it that solar panel's generated electricity would be the same whether it's installed in scandinavia or africa, as long as it faces in the same direction? or am i stupid
i'm asking this because everywhere i hear how "solar panels have higher efficiency near the equator", but that's just not true. Maps such as these are common on the internet:
And they suggest that solar energy around the equator would be twice as available as on northern latitudes, but actually that's just the solar irradiation if the panels weren't inclined, but in practice, they were likely will be. So they receive similar amounts of power.
edit: so, it's the cloud cover. got it; thanks :D
There's several factors here.
The most important probably being the energy per square meter. Higher latitudes gets less energy per square meter than equatorial latitudes.
There's also the mentioned cloud cover and atmosphere density.
The climate it's also important. As higher latitudes tends to be more cloudy.
And sun hours, here is not about the total energy but how it's distributed. As sun hours are more estable near the equator (12 hours light 12 hours dark) while in higher latitudes you can get 4 hours light some times of the year that can't amount to nothing, and 20 hours of day other times of the year which are nice, but there's no way to store that energy for the winter lack of sunlight.