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RE: Solar Panel damage



On Wed, 22 Oct 2003, Robert McGwier wrote:

> This is only true  for series cells and is because
> you are breaking the circuit.  If you have parallel
> cells or strings of cells, it decreases the shadowing
> problem.  Then the problem becomes the low voltage or
> matching.  Always a problem somewhere!

Ah, good point. It only occurs in single-string panels. If two strings are
paralleled, the blocking diode prevents the shadowed string from reverse
current from the other panels, and their paralleling to the load keeps the
open circuit voltage under load.
 thanks
Bob

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