Solar Power Schools
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How much would a Solar panel to power a pretty big school be?
You’re probably looking in the neighborhood of a million dollars. The first thing you’ll do is audit the energy usage of the whole school. Let’s say you have a cheap PC that takes 300 watts. 300 watts of Solar Panel is several thousand dollars. For that, you could buy about 6 computers! Including one that’s only 20 watts. Now you only need a few hundred dollars worth of solar panel 
So you go through the whole school like that. Make it efficient. Now you’re buying a MUCH smaller solar panel than you would have otherwise.
How well is the building insulated? Does it need new doors or windows? Get em and save a fortune heating the place. How about earth sheltering the roof? Thermal masses? Go through it all.
Does it use electric heat? Nope not with solar panels! Put in a solar-thermal system that is 50 times cheaper. Air conditioning? Retrofit to ground loop heat pumps and save a lot more energy.
Then when you’ve squeezed every watt out of the school’s energy use, you put up a (much smaller) solar panel for a great deal less money.
*How To Design Solar Photovoltaic Systems* : Solar Energy in Schools
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