How much is the output dropping? 10% or so on a hot day? on a 1kw system that is $200 worth of panels that are more or less being cut out of your production, as I see it you can either spend that $200 on another panel, or you can spend it on a roll of copper pipe... then another $200 on a pump, $500 on a storage tank and the list goes on and on! or you can buy another panel and get more output all of the time!
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