The biggest criticism of wind and solar energy has long been their variability as sources of energy for the grid. The sun is only out during the day, and the wind doesn’t blow 24/7.

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They’re not great “baseload” sources of electricity, and their variability can make the rest of the grid harder to manage (see California’s “duck curve”).  To solve this challenge, cheap and abundant renewable energy needs to be moved from when it’s produced to when it’s needed.

Energy storage is the answer, and it’s becoming big business faster than you might think.  Energy storage growth The estimates of energy storage’s growth are incredible.

According to GTM Research, energy storage installations in the U.S. totaled …