Digest for RE-wrenches at topica.com, issue 1756 [RE-wrenches]

[Ray Walters]

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>
>cheap controller, like a used C40 (strong, reliable, versatile, and obsolete)
>Allan at Positive Energy

Obsolete?? Man am I feeling old....
  Many times the benefits of MPPT just don't outweigh the cost.  With 
smaller arrays (under 600 watts), especially of mismatched modules, the 
year round boost  (10% to 20%) doesn't pay for itself. After less than 
overwhelming results with MPPT, I still spec C-40s in some smaller 
systems.  Maybe the new 30 amp models from Blue Sky and Outback? will fill 
that gap.

Ray

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