Eos Energy Enterprises Inc (<a href="https://www.nasdaq.com/market-activity/stocks/eose" target="_blank">NASDAQ:EOSE</a>), a US provider of zinc-based long-duration energy storage systems, has closed a USD-303.5-million (EUR 288.7m) loan guarantee by the US Department of Energy’s (DOE) Loan Programs Office (LPO), it was announced on Tuesday.