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Selecting the proper mount for your solar panels is important.  The solar modules must be outdoors in open, direct sunshine facing the noon sun direction. (Yes, we have seen panels installed in the shade!) Exposure to sunshine must be free of all shadows from trees, Mounts & Rackswires, buildings, etc. A shadow on any part of a photovoltaic module will cut off much of its power (no matter what some advertisements claim).

Precise aim is not necessary. 95% of full power is produced within 20 degrees of the sun. As the sun rises and sets, modules aimed at the noon sun give full power from 10 a.m. to 2 p.m. Morning sun and late afternoon sun is less direct so less power is generated during these time periods. This means on a full sunny day, on average across the country, you can count on about 5 hours at a module’s rated amperes.

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