TLDREos Energy shares sank despite quarterly revenue surging 351% to $68.8 million.A $100 million Blanquilla battery order pushed Eos backlog to a record level.Eos reported a $275.7 million net loss despite sharp year-over-year sales growth.Eos backlog reached $807 million as new and repeat customers placed more orders.Eos narrowed 2026 revenue guidance while raising output at its Thorn Hill plant.Eos Energy Enterprises (EOSE) shares plunged 12.18% to $3.82, then slipped another 1.05% after hours to $3.78. The decline followed strong revenue growth, deep losses, and a narrower full-year sales outlook. However, the US zinc-storage manufacturer secured a major battery order and record backlog, showing continued demand.Eos Energy Enterprises, Inc., EOSERevenue Growth Fails to Offset Heavy Quarterly LossesEos reported second-quarter revenue of $68.8 million, up 351% from the same period last year. A 207% increase in cube deliveries drove the growth across its expanding project base. First-half revenue also surpassed the company’s total revenue for all of 2025.Eos recorded a $48.8 million gross loss and a negative 71% gross margin. Higher production volumes and lower conversion costs improved the margin by 132 percentage points yearly. Underused factory capacity and increased project expenses continued to weaken manufacturing results.The company posted a $275.7 million net loss attributable to shareholders. Fair-value changes on certain liabilities caused most of the loss after quarterly share-price movements. Adjusted EBITDA loss reached $71.4 million, compared with $51.6 million one year earlier.Record Backlog and Major Orders Strengthen Commercial PositionEos ended June with an $807 million backlog covering 3.4 GWh of planned projects. The backlog increased 25% sequentially and 20% yearly after orders from six customers. Four new customers placed orders, while two existing customers returned with additional commitments.After quarter-end, Frontier Power USA placed a $100 million order for the Blanquilla project’s first phase. The order forms part of a 2 GWh capacity reservation agreement with Eos. Frontier Power USA also raised $263 million, exceeding its original $250 million equity target.The joint venture expects more than $1 billion in deployable project capital. Its development pipeline totals about 16 GWh, including 1.8 GWh nearing construction milestones. Eos also secured a Golden Dome defense contract for storage deployment at critical infrastructure.Thorn Hill Expansion Shapes Guidance and Manufacturing StrategyEos launched commercial production on Line 2 at its Thorn Hill facility during June. The new line reduced battery cycle time by about 10% compared with Line 1. Bipolar line cycle times also improved by roughly 11% during initial operations.The company currently runs one partial shift while it increases production toward full capacity. Eos expects Line 2 to reach full output during the fourth quarter. Management also continues evaluating the consolidation of manufacturing operations into Thorn Hill.That consolidation could improve capacity use, lower costs, and support stronger margins. Eos tightened 2026 revenue guidance to between $300 million and $350 million. The company previously projected annual revenue between $300 million and $400 million.Eos ended June with $364.1 million in total cash, including restricted balances. Its technology also surpassed 6.5 GWh of cumulative discharged energy across deployed systems. Projects totaling more than 200 MWh should begin operations before the end of 2026. The post Eos Energy Enterprises (EOSE) Stock: Sinks Despite 351% Revenue Growth and $100 Million Battery Order appeared first on Blockonomi.