Eos preliminary Q2: record revenue, $807M backlog, second US battery line in production
Zinc-halide long-duration storage maker Eos Energy Enterprises pre-announced Q2 2026 revenue of $68 to $69 million on July 15, its highest quarter ever, with backlog up roughly 25 percent quarter-over-quarter to about $807 million. First-half 2026 revenue already exceeded all of 2025, and Battery Line 2 at the Thorn Hill, Pennsylvania plant has started commercial production, keeping the company on the path to a 4 GWh annual run-rate by year-end. The read-through: a non-lithium, US-domiciled long-duration storage supplier is finally clearing the scale threshold that offtake counterparties actually price.