The technical potential could rise to ‘nearly 150 PW-hr by 2060′.

The best way to incentivize sustainable energy is to make it affordable.

And the sharp drop in the price of photovoltaic systems has made solar capable of rivaling coal power in China, according to an analysis from researchers published in the journal Proceedings of the National Academy of Sciences of the United States of America.

However, as solar power comes to encompass a greater slice of a national economy’s power grid, it becomes harder to achieve a sustainable balance against the fact that solar can only generate power intermittently, potentially exacerbating energy management challenges.

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