Cost-effective energy storage for electrical grids has been one of the biggest challenges for the power networks that deliver electricity to homes and businesses. Private companies have recently ramped up efforts to develop batteries or “supercapacitors,” enabling for example the use of solar energy at night or the reduction of fossil fuels reliance during peak hours.

The following 12 VC-backed energy storage startups, with a focus on energy storage for grids, that have raised equity since January 2014. The companies have raised $200M in aggregate funds in 2016 alone, as of 11/29/16:

Fluidic Energy, VIONX Energy, Powervault, Primus Power, Sunverge, Sonnen, Staq Energy, 24M, Aquion Energy, Alveo Energy, Flexgen, Ambri

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