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What is the difference between Series and Parallel?

 Simple understanding of Series and Parallel Connection

Here is an image that depicts the difference between the two connections. Notice that on a parallel connection the voltage stays the same but the current doubles, and on a series connection the voltage doubles and the current stays the same. 

The recommended way is usually to have a combiner box at the location of the panels, that way there is only a single set of wires that come from the panels into the SCC.
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