That idea is consistent with a July National Renewable Energy Laboratory (NREL) study, which concluded that every region across the U.S. offers the potential for peaking capacity needs to be met by short-duration, four-hour battery storage systems.

“One of the largest takeaways I had after concluding my report was that identifying the most economical projects and the highest potential customers for storage has really become a priority for a diverse set of companies, including power providers, grid operators, battery manufacturers and research integrators,” Rodriguez said. “Because of that, we’re starting to see much more purposeful installations.”

The international landscape

North America, the Asia Pacific and Western Europe were the leading regions for deployed energy storage power capacity during the second quarter of 2019, Navigant found, with lithium-ion batteries remaining the fastest growing storage technology.

“The majority of investment today is in battery storage, and part of that is because lithium-ion batteries are the energy source of choice for new projects because of their falling prices,” Rodriguez said. “Also, because of the shorter development timeline, relative to other energy storage technologies and flexible operating parameters.”

A second report published last week by Rethink concluded that global energy storage will grow from 6 GWh installed today to 635 GWh by 2030.

Annual energy storage additions will jump from 6 GWh this year to 101 GWh by 2030, according to Rethink’s report. The U.K.-based market research company predicts that the Asia Pacific region, led by China, will dominate dominate installations with 273 GWh, or some 43% of the total expected capacity, while Europe and the U.S. will account for about 31% of cumulative capacity.

Rethink Technology Research believes that lithium-ion batteries will remain the predominant storage technology over the next decade, spurred by the anticipated growth of the EV market.

“The top 10 [battery] manufacturers alone have planned some 510 GWh of annual global factory capacity by 2030, with 45% of global lithium-ion manufacturing capacity located in China, Europe and South Korea,” the company said in a statement.

Unlike other analyses, Rethink Technology expects a weaker U.S. market, unless lawmakers will extend the investment tax credit (ITC) to include storage technologies. The ITC is set to expire at the end of 2021 for residential systems, while a permanent 10% credit will remain in place for commercial systems. Currently, storage systems can qualify for the credit if paired with solar.

“[S]ignposts such as the record residential storage quarter, massive FTM pipeline growth, and innovative policies such as the Massachusetts clean peak standard point towards an industry that is maturing and should stabilize at scale over the next two years.”

Dan Finn-Foley

Head of energy storage, Wood Mackenzie Power & Renewables

Rising customer interest and incentives in more states contributed to a 41% quarter-over-quarter increase in the U.S. residential storage market during the second quarter of 2019, the latest U.S. Energy Storage Monitor from Wood Mackenzie Power & Renewables and the U.S. Energy Storage Association found.

While the residential storage sector set a new record in Q2 with the deployment of 35 MW, analysts lowered the overall U.S. energy storage outlook for all of 2019. Wood Mackenzie said that weaker-than-expected mid-year numbers in some behind-the-meter markets and front-of-the-meter (FTM) project delays caused the outlook to fall to 478 MW, an increase of 54% over the 311 MW deployed in 2018.

“The nascent energy storage market in the U.S. continues to grow in fits and starts,” Dan Finn-Foley, head of energy storage for Wood Mackenzie Power & Renewables, said in a statement. “But signposts such as the record residential storage quarter, massive FTM pipeline growth, and innovative policies such as the Massachusetts clean peak standard point towards an industry that is maturing and should stabilize at scale over the next two years.”