Apple plans to power this Maiden, North Carolina, data center with biogas.

Apple says that a biogas-powered fuel cell system that will help power its Maiden, North Carolina, data center could be up and running as early as June, much earlier than previously expected.

The company made the disclosure in a Wednesday regulatory filing with the North Carolina Utilities Commission.

First reported by Greensboro News & Record, the filing offers a few more technical details on the 4.8 megawatt facility, which will be comprised of 24-200 kilowatt fuel cell systems that will “sit on a common concrete pad out of doors.” Each system will have six power-generating modules, Apple says.

The fuel cells take methane — in this case, produced by animal waste — and convert that to electricity. Apple’s installation will be built by California’s Bloom Energy, and it will be the largest such fuel cell installation built outside of the utility industry, the News & Record reports.

The first of Apple’s fuel cells could be online as early as June, and Apple expects to have the whole facility up and running by the end of November. Apple isn’t saying publicly what it will cost — that part was filed under seal.

Apple’s trying to turn around its reputation as a dirty energy user with the Maiden facility, which powers its iCloud. Right next to the biogas plant, Apple’s building a massive 20-megawatt solar array.

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