the circular thinking behind this is pretty silly. the battery is able to store about 1/3 of a day's worth of energy an average home uses. A 12panel solar system (about the limit you can put on most homes) can produce about 1/6th of a days worth of power. That doesn't remotely get you off the grid (despite tesla's claims).
Advances in batteries and solar are always good, the reality of where we are and where it will take us are greatly exaggerated.
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