| http://www.w3.org/ns/prov#value | - Not tying solar or wind or other sources to the grid is highly wasteful, because the power is discarded any time the battery is not empty (or worse, not connected.) Grid tie makes the grid greener, and people who do that can feel good about it if they do it well, but it does???t make driving more than a tiny smidgen of a percent greener than it was.
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