This article first appeared on GuruFocus .
Release Date: November 05, 2026
For the complete transcript of the earnings call, please refer to the full earnings call transcript .
Positive Points
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Eos Energy Enterprises Inc ( NASDAQ:EOSE ) achieved record revenue of $82.7 million, up 171% year-over-year and 20% sequentially, driven by a 23% increase in shipments.
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The company reported its eighth consecutive quarter of gross margin improvement, with adjusted gross margin improving 18 points sequentially and 58 points year-over-year.
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Manufacturing efficiency improved significantly: Thornhill produces about 20% more batteries per shift than Turtle Creek, and Line 2 reached the same first-pass yield as Line 1 in just three months.
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Product cost reductions were substantial: material cost per cube decreased 9%, direct labor cost per cube declined 17%, and manufacturing overhead per cube fell 8% compared to Q2.
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Eos Energy Enterprises Inc ( NASDAQ:EOSE ) ended the quarter with $344 million in total cash, including $271 million unrestricted, and has additional liquidity sources such as $20 million under DOE Tranche 2, $24 million in Pennsylvania grants, and $39 million in net production tax credits.
Negative Points
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Backlog decreased from $807 million in Q2 to $765 million in Q3, as the company shipped more than it booked, indicating potential demand timing issues.
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Gross loss remained significant at $44.2 million on a GAAP basis and $36.8 million on an adjusted basis, reflecting ongoing profitability challenges.
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Adjusted EBITDA was negative $63.8 million, with a negative margin of 77%, despite improvement, highlighting the company's continued cash burn.
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Related party revenue represented 83% of quarterly volume, primarily from Frontier Power USA, indicating a high dependence on a single customer.
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Eos Energy Enterprises Inc ( NASDAQ:EOSE ) was not selected in the first round of NYSERDA's bulk storage program, which awarded less than a third of its target, representing a setback in securing state-level projects.
Q & A Highlights
Q: With Q4 adjusted gross margin guided to negative 25% to negative 20%, what should investors expect for cash burn and CapEx over the next two quarters as production shifts to Thornhill? A: CFO Alessandro Lagi said operating cash flow continues to track closely with adjusted EBITDA, with working capital essentially flat despite the volume ramp, and he expects that alignment to improve quarter over quarter until profitability. CapEx is expected to moderate starting in Q4 as the Line 2 and Thornhill build-out nears completion. CEO Joe Mastrangelo added that any near-term CapEx variance would stem from the timing of deals that will shape 2027 volume plans.
Q: What would quarterly cash burn look like if the company reaches roughly 10% gross margin in the second quarter of next year, and how much runway does current liquidity provide? A: Lagi declined to give a specific burn figure, saying the company will provide more clarity on 2027 during the next earnings call. He noted CapEx will step down in Q4 and run even lower thereafter, and that liquidity is supported by $271 million of unrestricted cash plus roughly $20 million under DOE Tranche 2, about $24 million of Pennsylvania grant reimbursements, and approximately $39 million of net production tax credits. Mastrangelo credited the operating CFO's discipline for cash burn growing slower than revenue.
Q: How is Frontier Power USA progressing in building its development pipeline and securing financing? A: Mastrangelo said Jay Bellows, announced as Frontier Power USA's CEO, brings both a customer contact list that is generating new pipeline and decades of real-time asset operating experience that is helping EOS improve its Dawn OS software. Frontier is working its own opportunities alongside projects EOS contributed, and is progressing on debt financing, including packaging Ariel Green insurance for both project-level and portfolio-level financing.
Q: Why were no EOS projects selected in NYSERDA's first bulk storage round, and when is the next solicitation? A: Mastrangelo said NYSERDA selected less than a third of the program's three-gigawatt target and that EOS believes its submitted projects met the program's goals. The next round is expected by year-end, subject to timing. He emphasized that other states have larger programs in progress with multiple customers included in the 3.5 gigawatt-hours of late-stage opportunities.
Q: What do state-level long-duration mandates, such as Virginia's, require, and how does EOS technology fit? A: Mastrangelo said state programs increasingly include duration mixes spanning 12 to 24 hours, with some multi-day tranches suited to other technologies. He said the programs are designed to give owners a return on investment, and that EOS meets the discharge-time and operating requirements while offering more than 90% U.S.-sourced materials. No program names EOS or zinc bromide specifically, so the company must work through each state's and customer's procurement process.
Q: Of the 72 points of margin improvement outlined last quarter, have any buckets materially changed, or is progress contingent on large deals landing in the first half of 2027? A: Lagi said Q3 and Q4 combined put the company more than 50% of the way to the 72-point target, with the same buckets driving results: lower material costs, lower conversion costs from Thornhill's layout and volume, and reduced field upgrade costs as Dawn OS controls are installed. Mastrangelo stressed the cost-out is structural rather than volume-dependent, citing a 10% improvement in battery module cycle time from Thornhill's stable operating environment, plus an engineering pipeline to simplify the product and remove parts.
Q: Are warranty costs or field asset remediation weighing on gross margin? A: Mastrangelo said warranty is not the issue; the drag comes from costs to upgrade field systems to Dawn OS, which will be incurred over the next two to three quarters. He clarified that the warranty reserve rises with volume but usage of that reserve has not changed over time. Product margin is approaching breakeven.
Q: What is the significance of the Google-linked 10-hour project in West Virginia, and could similar hyperscaler deals follow? A: Mastrangelo said the deal followed extensive technical validation by multiple parties and that long duration improves project returns for Google. He argued AI loads and industrial loads such as steel mills produce similar spikes and valleys that need buffering against traditional generation, and that EOS can handle short-term fluctuations and long-duration discharge with the same asset. He expects orders to close from the 3.5 gigawatt-hours of near-term opportunities matching this use case, with the key remaining task being field reliability approaching "five nines."
Q: What drove the sequential decline in backlog to $765 million, and what is the outlook for converting late-stage opportunities? A: Mastrangelo said the decline from $807 million reflects project timing, not a demand change, since EOS shipped more than it booked. The company is working 3.5 gigawatt-hours of late-stage opportunity, more than its entire backlog, with more than half awaiting financing and the rest in contract negotiations. Frontier Power USA is about 43% of backlog, and EOS added six customers last quarter, four of them new.
Q: What drove the record $82.7 million in Q3 revenue, and why were average selling prices lower? A: Lagi said revenue rose 171% year over year and 20% sequentially on a 23% increase in shipments across 10 projects. Lower pricing reflected project mix rather than a market trend, and ASPs are expected to return to first-half 2026 levels in Q4 as mix normalizes. Related-party revenue was 83% of quarterly volume, including two projects originated by third-party developers and later acquired by Frontier Power USA, a percentage expected to decline starting in Q4.
Q: How did operations improve in Q3, and what is the timeline for consolidating production at Thornhill? A: COO John Mayhaz said shipments rose 23% sequentially, battery production 25%, and subassembly 26%, with Line 2 growing from about 1% of battery output in Q2 to 17% in Q3 on a partial shift schedule. Thornhill produces about 20% more batteries per shift than Turtle Creek, and Line 2 matched Line 1's first-pass yield in three months versus 13 to 26 months
For the complete transcript of the earnings call, please refer to the full earnings call transcript .
