Eos Energy Enterprises (NASDAQ: EOSE) released preliminary financial results for the second quarter ended June 30, 2026, reporting expected revenue of $68 million to $69 million, which the company said represents its highest quarterly revenue to date.

The revenue figure reflects more than a threefold increase in shipments compared to the same period a year earlier. The company also said revenue recognized in the first half of 2026 exceeded its total revenue for all of 2025.

Despite the revenue growth, Eos reported a gross margin loss between 69% and 73% for the quarter. The company attributed the loss in part to start-up costs and lower initial production volumes tied to the launch of Battery Line 2 at its Thorn Hill facility, which commenced commercial production in mid-June 2026.

Backlog reached approximately $807 million as of June 30, 2026, a 25% increase from the prior quarter, as new orders booked during the period exceeded shipments recognized.

Total cash, including restricted cash, stood at approximately $364 million at the end of the quarter. Customer collections of approximately $78 million were received during the period, exceeding quarterly revenue.

"We expect to deliver record quarterly revenue and record backlog, demonstrating that the investments we have made in our manufacturing platform continue to translate into stronger topline and commercial performance," said Joe Mastrangelo, Chief Executive Officer.

Eos said it completed Site Acceptance Testing for 50% of its bipolar automation line during the quarter, with full commissioning of all bipolar machines expected in July 2026. The company targets a 4 GWh annual run-rate manufacturing capacity by year-end.

Full second-quarter 2026 financial results are scheduled for release before U.S. markets open on August 5, 2026, followed by a conference call at 8:30 a.m. Eastern Time. The preliminary figures are subject to change pending completion of quarter-end closing procedures.