So, here is the July one:
![Perfor4.gif](http://www.builditsolar.com/Blog/assets_c/2009/07/Perfor4-thumb-300x230-2.gif)
As you might expect for the middle of summer, the solar fraction was 100%.
This month was a test of the strategy to keep the stagnation temperatures within the limits of the PEX tube used in the collector, and it appeared to do OK with a maximum collector temperature of 195F.
More details on the $1K system...
Performance plots for the last 10 months...
Gary