Thursday, December 10, 2009

Power Source--Relative Contributions

As an addendum to the last post, the figure above shows the relative fraction of the different power sources. Solar varies between 10 and 15 percent of our power that we use. The big shift is when the Ecopower was installed. We now co-generate locally between 25 and 85 percent of our own power depending upon the heating needs with the largest local generation naturally being in the winter. Combined with the solar, during the swing heating months we generate virtually all of our power locally.

For completeness, the two vertical lines show important operation changes. The first is when the solar panel upgrade occurred (can you tell the difference?! It sure is hard!). The second is when we switched the Ecopower from 2nd stage heating to first stage heating. The plan is to keep it that way at least through this coming winter with no other changes.


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