150 Hours of Storage? Company Says That’s True to Form

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The Minnesota-based power cooperative that on May 7 said it would close a large Midwest coal-fired power plant also noted it has a contract with Form Energy, a Bill Gates-backed company that offers a long-duration energy storage solution, one that the group says could provide 150 hours of continuous power.

Form Energy has been a quiet organization, funded by Gates' Breakthrough Energy Ventures and other investors and saying little about its work. Thursday's announcement by Great River Energy (GRE) revealed that Form's fundamental energy storage technology is an aqueous air battery system" that leverages some of the safest, cheapest, most abundant materials on the planet" in order to commercially deploy a 1-MW/150-MWh long-duration storage product.

Typical lithium-ion battery storage systems provide fourhours of storage, so Form's 150 hours of storage is an exponential leap intechnology.

Mateo Jaramillo, CEO of Form Energy, in the past had talkedabout seasonal storage" with regard to his company's work, and has said hiscompany's product is a bi-directional power plant." He has said Form's batterysystem allows for a fundamentally new reliability function to be provided tothe grid from storage, one historically only available from thermal generationresources."

Jaramillo in a statement Thursday said, Our vision at FormEnergy is to unlock the power of renewable energy to transform the grid withour proprietary long-duration storage. This project represents a bold steptoward proving that vision of an affordable, renewable future is possiblewithout sacrificing reliability."

The first commercial application of the system will be in a project with GRE at a site in Cambridge, Minnesota. Great River on Thursday said the system could be online in 2023.

GRE is a not-for-profit wholesale electric power cooperative that provides electricity to 28 member-owner distribution cooperatives. It is Minnesota's second-largest electric utility, behind Xcel Energy.

Increase Reliability'

Commercially viable long-duration storage could increase reliability by ensuring that the power generated by renewable energy is available at all hours to serve our membership. Such storage could be particularly important during extreme weather conditions that last several days. Long-duration storage also provides an excellent hedge against volatile energy prices," said Jon Brekke, GRE vice president, in a news release.

A true low-cost, long-duration energy storage solution thatcan sustain output for days, would fill gaps in wind and solar energyproduction that would otherwise require firing up a fossil-fueled power plant,"said Jesse Jenkins, an assistant professor at Princeton University, in astatement.

Low-cost, long-duration energy storage has been sought afteras a way to help renewable resources such as solar and wind power perform morelike baseload thermal generation. At present, the only long-duration energystorage comes from pumped hydro systems.

Several groups have pursued long-duration energy storage,including flow battery companies ViZn, Sumitomo, ESS, UET, Invinity, andPrimus. There have been gravity-based systems from Energy Vault, Gravity Power,and Ares Power. Some companies have looked at compressed air or gas, includingHighview Power and Hydrostor.

Highview Power, a company aligned with POWER's Distributed Energy Conference, on May 8 said its CRYOBattery, a long-duration energy storage technology based on the principle of air liquefaction, received an honorable mention award in the Energy category of Fast Company's 2020 World Changing ideas. The company's CRYOBattery technology utilizes air, which is cleaned, cooled, stored as a liquid, then converted back to gas to drive a turbine which produces electricity. The company has said it is the only long-duration energy storage solution that is commercially available today that offers multiple gigawatt-hours of storage, is scalable with no size limitations or geographical constraints, and produces zero emissions."

More Than $50 Million in Funding

Form Energy was launched in 2017 and has raised more than $50million in funding. The company is backed by investors including Eni Next LLC; theMassachusetts Institute of Technology's The Engine; Breakthrough EnergyVentures, founded by Gates in 2015; Prelude Ventures; Capricorn InvestmentGroup; and Macquarie Capital.

Long-duration energy storage would allow such projects to replacecoal- and natural gas-fired peaking power plants that are currently used tohelp the grid during periods of high demand for electricity.

Long-duration energy storage solutions will play anentirely different role in a clean electricity system than the conventionalbattery storage systems being deployed at scale today," said Jenkins, thePrinceton professor who studies low-carbon energy systems engineering. Lithium-ionbatteries are well suited to fast bursts of energy production, but they run outof energy after just a few hours. A true low-cost, long-duration energy storagesolution that can sustain output for days, would fill gaps in wind and solarenergy production that would otherwise require firing up a fossil-fueled powerplant. A technology like that could make a reliable, affordable 100% renewableelectricity system a real possibility,"

Form's sales pitch to utilities includes both its technology and details about how power producers can optimize their energy portfolios using a proprietary software analytics system. The software was built to model high-penetration renewables at a system level, in an effort to discover how storage can be combined with renewable energy to create a low-cost energy source. The tool helps planners reduce exposure to extreme weather events and minimize uncertainty around commodity prices under a variety of future grid scenarios. Jaramillo has said Form can run a complex co-optimization" analysis using its Formware program, which can model future power systems that will contain variable electricity sources, including intermittent solar and wind.

In order to understand how best to make the energy transition, new analytical tools are needed, and Formware allowed us to work with GRE to systematically and thoroughly understand the value that our assets can bring to their system," said Marco Ferrara, SVP Analytics and Business Development for Form Energy.

Great River Energy is excited to partner with Form Energy on this important project. The electrical grid is increasingly supplied by renewable sources of energy. Commercially viable long-duration storage could increase reliability by ensuring that the power generated by renewable energy is available at all hours to serve our membership. Such storage could be particularly important during extreme weather conditions that last several days. Long-duration storage also provides an excellent hedge against volatile energy prices," said Brekke.

GRE and Form on Thursday said the initial deployment, designed to operate for 20 years, would be the first of many of Form's battery systems. Form has said the first project will be sited at an existing power plant in Cambridge, and located on about one acre. The company said it would have enclosed, weatherized systems on a concrete pad, and would not feature the containers typically associated with a lithium-ion battery project.

-Darrell Proctor is associate editor for POWER (@DarrellProctor1, @POWERmagazine).

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