Ess Tech Earnings Call: Big Bets, Long Runway

Ess Tech, Inc. ((GWH)) has held its Q4 earnings call. Read on for the main highlights of the call.

Ess Tech’s latest earnings call balanced cautious optimism with stark realism about the road ahead. Management highlighted significant commercial wins, sharper product focus and deep cost cuts that are reshaping the business. Yet revenue has plunged, losses remain heavy and liquidity looks tight versus the scale of its ambitions, pushing meaningful revenue out to 2027–2028.

Major Commercial Wins and Partnerships

Ess Tech spotlighted Project New Horizon, a 5 MW / 50 MWh installation at SRP’s Copper Crossing, with Google confirmed as offtaker for multiyear operational testing. The company also secured a $9.9 million contract tied to a deployment at a U.S. Space Force installation in Alaska, underscoring growing traction in defense and critical infrastructure.

Clear Product Positioning — Energy Base

Executives framed the Energy Base as the company’s flagship, a 10–22 hour iron flow system tailored to utility, data center, industrial and defense needs. They stressed unlimited cycling, no capacity fade over 25 years and very high U.S. domestic content, positioning the platform to benefit from policy tailwinds and reliability demands.

Meaningful Cost Reductions and Operational Restructuring

Operating expenses dropped 33% year over year to $29.7 million as Ess Tech structurally reset its cost base. Cuts were broad-based across R&D, sales and marketing, and G&A, signaling a shift from expansive development towards leaner execution while preserving core commercialization capabilities.

Improved Profitability Trajectory on Key Metrics

The company reported notable progress in narrowing losses despite minimal revenue, with gross loss improving 39% to $27.7 million. Net loss shrank to $63.4 million and adjusted EBITDA improved by roughly $27 million, indicating that restructuring and scale efficiencies are beginning to flow through the P&L.

Strengthened IP and Leadership Bench

Ess Tech expanded its technology moat by acquiring VoltStorage’s intellectual property and assets, adding patents and experienced personnel to its long-duration storage portfolio. It also filled key leadership roles, appointing a permanent CFO and bringing in VoltStorage’s former CCO as its new commercial chief to drive market adoption.

Financing Moves and Balance Sheet Management

Management detailed a series of capital actions including a $40 million Yorkville financing, a $15 million registered direct deal and proceeds from an at-the-market program. The company has already repaid most of the initial Yorkville tranche, signaling a focus on managing dilution and debt while extending its cash runway.

Steep Revenue Decline Underscores Transition Pain

Full-year 2025 revenue fell to $1.6 million from $6.3 million, a drop of about 75% as legacy products were wound down and Energy Base shipments remained limited. The sharp decline highlights the financial strain of pivoting from earlier offerings to a new flagship platform that is still in early commercialization.

Persistent Losses and Negative EBITDA

Despite improvements, Ess Tech remains far from breakeven with a net loss of $63.4 million and adjusted EBITDA of negative $44.3 million for 2025. Management framed these losses as investments in manufacturing readiness and commercial pilots, but investors will need patience as the path to profitability is still several years out.

Delayed Revenue Ramp and Timing Risk

The company acknowledged that most revenue from key Tier 1 customers is now expected in 2027–2028, with manufacturing starting in 2026 and first deliveries targeted for late 2027. With legacy unit sales fading and limited visibility for 2026, Ess Tech faces a revenue gap period where execution on pilots becomes critical.

Liquidity Position and Future Capital Needs

Ess Tech ended 2025 with $22 million in total liquidity, combining cash and other liquid assets, and minimal inventory. Management stated that additional capital will be necessary to support its 2027 build-out plans and is weighing future funding options carefully while avoiding immediate further use of its at-the-market program.

Leadership Turnover and Execution Risk

The departure of the chief operating officer and appointment of an interim successor add uncertainty at a pivotal commercialization stage. Management emphasized that flawless execution on flagship projects such as SRP’s installation will be essential to unlock follow-on orders and prove the Energy Base’s value proposition.

Guidance and Outlook

Looking ahead, Ess Tech framed 2026 as a year focused on scaling manufacturing for the Energy Base, with deliveries targeted for December 2027 and recurring revenue potentially starting in 2028 on long-term agreements. The company expects financial metrics to continue improving, but meaningful top-line growth is largely deferred to 2027–2028, leaving investors to closely watch cash burn and execution milestones.

Ess Tech’s call portrayed a company that is tightening its operations and securing marquee customers while betting heavily on a single differentiated product platform. The long-duration storage story remains compelling, but with revenue depressed, losses ongoing and capital needs ahead, the stock will likely trade on confidence in management’s ability to deliver on its delayed but potentially sizable revenue ramp.