Battery storage could be the holy grail for the longterm success of photovoltaic solar. 

The intermittency of the renewable energy source — the result of cloud coverage and the sun going down at night — can lead to disruptions in the electric grid at high penetrations. 

However, the New York Times reports today that solar thermal energy could provide the panacea. 

In addition to the companies mentioned in the article, Hawaii-based Sopogy is working on solar thermal technology. 

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