STEM (STEM) Q1 2026: PowerTrack Software Grows 16%, Utility-Scale Bookings Double, Margin Durability Proves Out
STEM’s Q1 2026 results confirm the company’s post-transformation cost structure and margin profile are holding, with software-driven revenue mix and operational efficiency delivering positive adjusted EBITDA in the seasonally weakest quarter. Utility-scale bookings more than doubled, PowerTrack software revenue accelerated, and the company reaffirmed full-year guidance, signaling confidence in execution and long-term growth levers. Investors should focus on the durability of margin expansion, the scaling of new utility and AI offerings, and the pace of ARR growth as hardware mix shifts later in the year.
Summary
- Margin Structure: Durable software and efficiency gains drove record Q1 gross margin and positive adjusted EBITDA.
- Utility-Scale Expansion: Bookings in utility-scale segment more than doubled, validating new product traction.
- Guidance Reaffirmed: Leadership’s full-year outlook and cost discipline underscore confidence in transformation sustainability.
Business Overview
STEM provides software and services for energy asset optimization, specializing in digital infrastructure for solar and storage management. The company’s core business centers on its PowerTrack platform, a cloud-based asset management and analytics suite, along with managed services and edge hardware. Revenue is generated from recurring software subscriptions, managed services contracts, edge hardware sales, and opportunistic battery hardware resales. Major segments include software, services, edge hardware, and battery hardware sales, with software and services now representing the highest margin and strategic focus areas.
Performance Analysis
STEM’s Q1 2026 performance highlights the impact of a deliberate shift toward higher-margin, recurring software and services revenue. Total revenue was down year-over-year, entirely due to the absence of battery hardware resales, which are expected to be second-half weighted. Core revenue—software, services, and edge hardware—grew 4% year-over-year, with PowerTrack software revenue up 16%, reflecting continued momentum in commercial and industrial solar monitoring and early utility-scale wins.
Gross margin reached a record 52% (non-GAAP), up from 46% a year ago, driven by the favorable shift in revenue mix and structural cost improvements made in 2025. Cash operating expenses were down 30% year-over-year and 10% sequentially, confirming the permanence of cost actions. Adjusted EBITDA was positive for the fourth consecutive quarter, a first for Q1, underscoring embedded operating leverage. Operating cash flow was negative $8 million, as expected for Q1 seasonality, but management expects improvement as working capital cycles normalize through the year.
- Revenue Mix Shift: No battery hardware sales in Q1 led to a higher proportion of recurring, high-margin software and services revenue.
- Software Margin Expansion: PowerTrack non-GAAP gross margin reached 75%, benefiting from SaaS operating leverage and selective price increases in response to supply chain and tariff pressures.
- Bookings Seasonality: Total bookings were $27 million, down sequentially on normal seasonality, but utility-scale segment bookings more than doubled QoQ, indicating traction in the company’s next growth vector.
ARR (annual recurring revenue) was stable sequentially, with PowerTrack ARR up 2% and managed services ARR down 4% due to a supplier bankruptcy. Solar assets under management grew 4% sequentially, supporting future software revenue base expansion. Management reaffirmed all full-year guidance, reflecting confidence in the underlying business model and operational discipline.
Executive Commentary
"We achieved positive adjusted EBITDA in our historically weakest quarter with record high software margins and a cost structure that is both lean and durable. This is not a one-time achievement. It's the foundation we're building on."
Arun Narayanan, Chief Executive Officer
"Cash operating expenses were down 30% year-over-year and down approximately 10% sequentially. The workforce and cost optimization actions we completed in 2025 and continue to implement into 2026 have become permanent structural efficiency, and the first quarter confirms that characterization."
Brian Musfelt, Chief Financial Officer
Strategic Positioning
1. Software-Led Margin Model
STEM’s move to a software- and services-centric model is now delivering durable margin expansion. With battery hardware resales absent in Q1, the company’s non-GAAP gross margin surged to 52%, and PowerTrack software gross margin hit 75%. This validates the SaaS margin thesis and demonstrates the company’s ability to extract leverage from a growing installed asset base.
2. Utility-Scale and International Growth
Utility-scale bookings more than doubled quarter-over-quarter, driven by PowerTrack EMS, a unified controls and monitoring solution for large-scale energy assets. New deals in Hungary and Germany, and a growing pipeline, point to increased credibility in this segment. International revenue, anchored by the Berlin office, was 5% of total and is expected to rise as European projects convert to revenue in late 2026 and 2027.
3. Disciplined Platform Extension
The acquisition of Rikoon, an Austrian automated fault detection provider, extends PowerTrack’s capabilities and supports customer retention as portfolios scale. This tuck-in was chosen over internal development for speed and impact, reinforcing management’s focus on high-return capital allocation and product differentiation.
4. AI-Driven Productivity and Product Differentiation
AI adoption is embedded both internally and in customer offerings. Nearly 70% of employees use AI tools weekly, driving development speed and operational efficiency, while PowerTrack Sage, the AI assistant, is live and showing strong early customer engagement. These efforts are intended to expand user adoption beyond technical operators and reduce friction for customers.
5. Managed Services and Customer Stickiness
Managed services, covering multi-year storage system operations, delivered $7 million in Q1 revenue. Despite a minor ARR dip from a supplier bankruptcy, customer satisfaction and optimization performance remain high, helping to anchor long-term customer relationships and recurring revenue streams.
Key Considerations
STEM’s Q1 2026 results reflect a company at the inflection between post-restructuring stability and the early stages of a new growth cycle. The quarter underscores the importance of revenue mix, cost discipline, and the scaling of new products for future upside.
Key Considerations:
- Margin Durability: Software-led margin expansion held even in a seasonally weak quarter, but will face natural compression as hardware sales return later in the year.
- Utility-Scale Pipeline: Bookings momentum in utility-scale is strong, but revenue conversion is weighted to late 2026 and 2027, requiring patience from investors.
- ARR Growth Pace: Sequential ARR growth was modest, with management pointing to seasonality and reaffirming full-year targets, but execution on new customer acquisition will be key.
- AI and Platform Differentiation: Early traction in AI-powered features and platform acquisitions must translate into measurable customer retention and expansion.
- Cash Flow Improvement: Operating cash flow remains a key watchpoint, with improvement expected as working capital normalizes and bookings ramp up through the year.
Risks
STEM’s business remains exposed to revenue timing volatility, especially as hardware sales are lumpy and utility-scale bookings have long conversion cycles. Supplier risk, as seen in the managed services ARR dip, and macro factors like tariff shifts and regulatory changes could impact both costs and demand. Sustaining high software margins as the business scales and hardware mix returns is not guaranteed, and any delay in international project commissioning could push out revenue realization.
Forward Outlook
For Q2 2026, STEM expects:
- Seasonal ramp in bookings and billings, with initial utility-scale EMS bookings from Q4 2025 converting to revenue.
- Continued margin durability, though some compression as hardware mix increases later in the year.
For full-year 2026, management reaffirmed guidance:
- Total revenue: $140 to $190 million
- Software, services, and edge hardware: $130 to $150 million
- Battery hardware resales: up to $40 million
- Non-GAAP gross margin: 40% to 50%
- Adjusted EBITDA: $10 to $15 million
- Operating cash flow: $0 to $10 million
- Year-end ARR: $65 to $70 million
Management cited strong utility-scale pipeline, ongoing cost discipline, and new product traction as key drivers for confidence in achieving these targets.
- Utility-scale revenue conversion to accelerate in late 2026 and 2027
- ARR growth to ramp as seasonality abates and new wins land
Takeaways
STEM’s Q1 2026 marks a turning point where margin structure and operational leverage are proven, while new growth vectors in utility-scale and AI-powered offerings begin to scale.
- Cost Discipline and Margin Proof: Structural efficiency and a software-led model enabled positive EBITDA in the lowest revenue quarter, validating the transformation narrative.
- Growth Engine Shifts: Utility-scale bookings and international expansion are building a long-term growth foundation, but require execution and patience for revenue realization.
- Future Watchpoints: Investors should monitor ARR growth cadence, hardware mix-driven margin shifts, and the operationalization of new AI and platform capabilities for evidence of sustained differentiation.
Conclusion
STEM’s Q1 2026 results demonstrate that the company’s 2025 transformation was not a one-off, but a foundation for durable profitability and scalable growth. With software margins holding, utility-scale wins building, and strategic bets in AI and international markets gaining traction, STEM is positioned to deliver on its full-year commitments—though execution on ARR and cash flow will remain under close investor scrutiny as hardware sales return in the second half.
Industry Read-Through
STEM’s margin expansion and software-centric model highlight the value of recurring SaaS revenue in the energy management sector, especially as hardware commoditization and supply chain volatility persist. The company’s early traction in utility-scale and international markets signals a rising demand for integrated, cloud-based asset management platforms as grid complexity and hybridization accelerate globally. Competitors in energy SaaS and asset optimization should note the strategic use of AI for both internal productivity and customer-facing differentiation, as well as the importance of disciplined, small-scale acquisitions to rapidly extend platform capabilities. The results reinforce that in energy tech, margin durability and capital discipline are as critical as top-line growth in winning long-term investor confidence.