WASHINGTON, Aug 31 (Reuters) - Long-term energy storage company EOS Energy Enterprises Inc got a conditional commitment for an up-to $400 million loan guarantee from the federal government, an office of the U.S. Department of Energy said on Thursday.

The loan guarantee is for construction of four manufacturing lines to produce next-generation utility and industrial scale zinc bromine battery energy storage systems in Turtle Creek, Pennsylvania, the Loan Programs Office said. (Reporting by Timothy Gardner Editing by Chris Reese)