The Federal Energy Regulatory Commission unanimously voted Thursday morning to remove long-standing barriers to energy storage in power markets, an emerging technology that can solve renewable energy’s most persistent problem: how to use it when the sun isn’t shining or the wind isn’t blowing.

The FERC order requires regional grid operators, the Regional Transmission Organizations and Independent System Operators, to revise their pricing to recognize the benefits of energy storage and allow the technology to compete with generators in wholesale power markets.

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