‘Rusty’ batteries could hold key to Minnesota's carbon-free power future

An artist’s rendering of a 56-megawatt iron-air battery system, developed by Boston-based Form Energy. Great River Energy plans to install a much smaller, 1.5-megawatt iron-air battery pilot project next to its natural gas peaking plant in Cambridge, Minn., next year. Xcel Energy is planning to install a 10-megawatt battery system in Becker, Minn. where it’s building a large solar project.
Courtesy of Form Energy
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