Energy storage in US microgrids sees substantial three-year rise

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Energy storage technology is now used in 44% of US microgrids with 92% of that storage commissioned since 2012, according to GTM Research’s latest report.

The study, 'North American Microgrids 2015: Advancing Beyond Local Energy Optimization' also found that renewables including solar are expected to account for 26% of total microgrid capacity in the US by 2020, up from just 6% today.

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Furthermore, cumulative investment in microgrids in the country will go beyond US$3.5 billion by 2040, with a total microgrid capacity of 2.8GW.

Omar Saadeh, senior grid analyst at GTM Research, told PV Tech: “The value proposition for energy storage in microgrids is increasing substantially in recent years.”

He said most energy storage microgrid applications in the country involve lithium-ion technology, with lead acid technology accounting for the next highest proportion.

Saadeh said that a growth in microgrids using solar over the coming years can be attributed to substantial cost decreases in PV and better integration methodologies.

He added: “The price point for those technologies is decreasing such that a microgrid can be seen as a more economically viable platform to integrate Distributed Energy Resources (DERs).”

There are also state initiatives promoting such technology in Massachusetts, New York and California with Connecticut introducing initiatives a few years ago.

A GTM statement said: “As solar PV adoption rates increase, flexible micro-grid solutions are becoming a significant component of renewable integration strategies in regions extending beyond high penetration states such as Hawaii and California.”

Saadeh said that various value propositions for micro-grids are seeing “substantial traction” at the moment. For example micro-grids can be used with critical infrastructure to keep the power on at a hospital or with large commercial customers that need to keep their operations running to meet their end goals.

Cumulative investment in microgrids in the country will go beyond US$3.5 billion by 2040, with a total microgrid capacity of 2.8GW. Image: GTM

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