Shares of Eos Energy Enterprises, Inc. (EOSE) fell 3.02% to $1.7650 in Monday's trading session, a loss of $0.0550, even as the energy storage company reported preliminary third-quarter revenue growth of as much as 172% year over year. The stock's pullback stood in contrast to rising battery shipments and steadily improving production efficiency at the company's Thorn Hill manufacturing facility.

Preliminary Third-Quarter Sales Climb Sharply

According to preliminary results, Eos expects revenue of $82 million to $83 million for the quarter ended September 30. That range represents year-over-year growth of 169% to 172%. On a sequential basis, revenue increased 19% to 21% from the previous quarter. Preliminary figures are issued ahead of complete quarterly financials and remain subject to finalization when Eos reports its full third-quarter results.

Battery shipments rose roughly 23% quarter over quarter as the company scaled up output. Thorn Hill's second production line contributed 17% of total battery production during the period, and Eos brought that line's first-pass yield in line with that of its original production line.

Eos manufactures American-produced zinc batteries for long-duration energy storage, serving commercial and industrial applications. Its technology targets customers that require electricity storage for extended periods, including data centers and defense sites. Despite the accelerating sales growth, however, the company continued to record substantial manufacturing losses.

Eighth Consecutive Quarter of Gross Margin Improvement

Eos expects third-quarter GAAP gross margins between negative 55% and negative 53%, an improvement of 16 to 18 percentage points from the second quarter. The company noted that this marked its eighth consecutive quarter of gross margin improvement. Negative gross margins mean the cost of producing each unit still exceeds the revenue it generates, so the streak reflects steadily narrowing per-unit production losses rather than profitability to date.

Greater output and lower conversion costs per unit helped reduce production losses. Nevertheless, Line 2 continued operating on partial shifts throughout the quarter. Eos has kept hiring and training workers to support higher volumes and longer operating hours, and the company plans to add its final shift in the fourth quarter after completing further employee training.

That staffing change is expected to enable around-the-clock operations at Thorn Hill as Eos consolidates manufacturing at the site. The facility is expected to ultimately provide 4 GWh of annual nameplate production capacity across its two lines.

Cash Position and $765 Million Backlog Underpin 2026 Outlook

Eos held approximately $344 million in cash, including restricted funds, at the end of September, down from $364 million in June. The decrease came despite $114 million in operating cash inflows during the reporting period, supported by customer deposits, project payments, and tax credit collections.

The company also received an $87 million advance under its Department of Energy loan facility. Capital spending reached approximately $35 million during the period, directed mainly toward Line 2 automation.

Eos's order backlog stood near $765 million, equivalent to roughly 3.2 GWh — a volume that exceeds the top end of the company's 2026 revenue guidance and approaches the 4 GWh of annual nameplate capacity Thorn Hill is expected to reach. The company received six customer orders during the period, including a previously announced $100 million order placed under an existing capacity reservation agreement.

For 2026, Eos expects revenue in the lower half of its $300 million to $350 million guidance range. Demand continues to be supported by defense projects and work involving MN8 and Google ahead of expanded fourth-quarter production. With expanded fourth-quarter output ahead, the near-term markers include completion of the final Thorn Hill shift, the transition to around-the-clock operations, and Eos's complete third-quarter financial results.

Source: Blockonomi