Cerberus's $100M joint venture gives Eos Energy the capital its long-duration storage story lacked. The venture will deploy 2GWh of zinc-based long-duration batteries, backed by $1.5B of performance insurance and a $150M rights offering. Lithium handles four hours while zinc handles days, and the grid cannot run on renewables without that; Cerberus doesn't do science projects. x.comÂ