Generators could produce less noise and see increased efficiency if powered by fuel cells, according to this article. The U.S. military has tested solid-oxide fuel cells in generators, finding they slash fuel consumption by 44%, and allow the machines to run almost silently. The technology may enter the residential generator market in several years, as Maryland startup Redox has been able to cut costs on fuel cell production by 90% with the help of new materials, this article says.

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