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View Diary: Germany now has 1.3 million solar energy systems which generated 28 billion kilowatt hours in 2012 (139 comments)

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  •  Political will is key . . . (2+ / 0-)
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    elfling, Lawrence

    California's net metering agreements with major utilities makes it very difficult to go the route of batteries.  When we installed our 3.2 kilowat system in 2005, we were required to agree to grid tie-in with PG&E if wanted the state subsidy for the system -- amounting to 30% of the purchase and installation cost.  The Feds kicked-in a $2000 tax credit also dependent on grid tie-in.  These laws would need to be adapted to support battery installation.  Ultimately, this comes down to what kind of system we want.  Grid tie-in leads to a commons where-in the utility grid is a shared and valuable core infrastructure much like roads and sewer systems. (and IMHO should be publicly owned).  A system based on local batteries is not as favorable to such an evolution.  In California, we should be pushing for batteries as emergency back-up for when the grid goes down in quakes, etc.

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