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Originally Posted by oil pan 4
They will do of good when the battery runs out.
Multi thousand dollar door stop.
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OK doubters, most of the articles (including this one) don't really explain what is going on very well. You are right that sending a bunch of batteries to an island that has lost its grid wouldn't normally be of any real value; but that isn't what is happening here. There was a grid in Puerto Rico which was supplied by generators using heavy fuel oil, diesel, natural gas, coal solar and wind (in order of output); and naturally the power was much more expensive than mainland US power. The electricity authority was pretty much bankrupt too: https://en.wikipedia.org/wiki/Puerto...ower_Authority So a lot of homes had grid tied rooftop solar which doesn't work if there is no grid frequency to synchronise to... What Tesla has done is to send a bunch of installers down to patch up the (damaged) rooftop solar systems and connect them into Powerwalls which will then operate in standalone mode.
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I would say they'll just recharge them from the sun.