Sungrow Power Supply (300274.SZ): Navigating Short-Term Margin Headwinds; Long-Term Growth Anchored by Energy Storage and AIDC Expansion

Date: April 08, 2026
Ticker: 300274.SZ (Shenzhen Stock Exchange)
Sector: Electrical Equipment & New Energy / Solar III
Rating: BUY (Maintained)
Current Price: CNY 126.99
Target Price Implied Upside: Based on 2026E EPS of CNY 8.16 and forward P/E multiples, the valuation remains attractive relative to historical averages and peer groups.

Executive Summary

Sungrow Power Supply Co., Ltd. ("Sungrow" or the "Company"), the global leader in solar inverters and energy storage systems (ESS), released its full-year financial results for 2025 on April 08, 2026. The Company reported total operating revenue of CNY 89.18 billion, representing a year-over-year (YoY) growth of 14.55%, and achieved a net profit attributable to shareholders of CNY 13.46 billion, up 21.97% YoY. While the top-line and bottom-line growth for the full year remained robust, the fourth quarter (4Q25) exhibited signs of pressure, with revenue declining 18.37% YoY and net profit dropping 54.02% YoY. This quarterly contraction was primarily driven by the timing of low-margin new energy investment development projects, a seasonal shift in high-margin storage revenue recognition, and rising raw material costs impacting storage gross margins. Additionally, the Company recorded increased asset impairment losses, reflecting a prudent approach to inventory valuation amidst industry-wide price competition and product iteration cycles.

Despite the near-term volatility in 4Q25, Sungrow’s core business fundamentals remain resilient. The inverter segment demonstrated stability with a 4% revenue increase to CNY 26.6 billion, underpinned by a strategic pivot towards higher-margin overseas markets and the discontinuation of negative-margin domestic residential projects. The energy storage segment emerged as the primary growth engine, surging 49% YoY to CNY 37.2 billion, with overseas shipments skyrocketing by 90%. The Company’s gross margin for the full year improved by 1.89 percentage points (pct) to 31.83%, indicating successful product mix optimization despite quarterly fluctuations.

Looking ahead, Sungrow is aggressively positioning itself at the intersection of renewable energy and artificial intelligence infrastructure. The Company has significantly ramped up R&D expenditure by 31.97% to CNY 4.18 billion in 2025, launching groundbreaking products such as the SG465HX string inverter and the PowerTitan 3.0 AC intelligent storage platform. Notably, Sungrow is expanding into the AI Data Center (AIDC) power supply sector, leveraging its Solid State Transformer (SST) technology to engage with leading global cloud service providers and domestic internet giants. This diversification into high-value, high-growth AIDC infrastructure represents a significant long-term catalyst.

We maintain our BUY rating on Sungrow. We project revenues of CNY 107.30 billion, CNY 126.82 billion, and CNY 148.45 billion for 2026, 2027, and 2028, respectively, with corresponding net profits of CNY 16.93 billion, CNY 20.82 billion, and CNY 24.53 billion. The current valuation, trading at approximately 15x forward P/E for 2026, offers an compelling entry point for institutional investors seeking exposure to the secular growth trends in global energy transition and digital infrastructure power solutions. Key risks include slower-than-expected global energy storage demand and intensifying competitive pressures in the inverter market.

Key Takeaways

1. Full-Year Resilience Amidst Q4 Volatility: A Deep Dive into Financial Performance

Sungrow’s 2025 financial performance underscores its ability to deliver consistent growth in a challenging macroeconomic environment, although the fourth quarter revealed specific structural and cyclical headwinds that warrant careful analysis.

Full-Year 2025 Highlights:
* Revenue Growth: Total operating revenue reached CNY 89.18 billion, a solid 14.55% increase from CNY 77.86 billion in 2024. This growth outpaces many peers in the solar equipment sector, reflecting Sungrow’s diversified global footprint and strong brand equity.
* Profitability Expansion: Net profit attributable to shareholders grew by 21.97% to CNY 13.46 billion. The faster growth in net profit compared to revenue indicates improved operational efficiency and a favorable shift in product mix towards higher-margin segments, particularly in international markets.
* Margin Improvement: The overall gross margin for 2025 stood at 31.83%, an improvement of 1.89 pct YoY. This expansion is a critical indicator of the Company’s pricing power and its success in mitigating cost pressures through scale and technological innovation.

4Q25 Underperformance Analysis:
The fourth quarter presented a stark contrast to the full-year trend, with revenue falling to CNY 22.78 billion (-18.37% YoY) and net profit dropping to CNY 1.58 billion (-54.02% YoY). The gross margin contracted significantly to 22.95% (-4.53 pct YoY), and the net margin fell to 6.93% (-5.75 pct YoY). Three primary factors contributed to this decline:

1. Timing of Low-Margin Projects: A significant portion of the Company’s new energy investment development business, which typically carries lower gross margins compared to pure equipment sales, was recognized in Q4. This temporal concentration skewed the quarterly margin profile downward. Institutional investors should view this as a timing issue rather than a structural deterioration, as the profitability of these projects contributes to long-term recurring revenue streams and asset base expansion.
2. Storage Revenue Recognition Shift: In Q3 2025, Sungrow experienced a peak in revenue recognition for its high-margin energy storage systems. Consequently, Q4 saw a natural normalization. Furthermore, the storage segment in Q4 faced upward pressure on raw material costs, which compressed margins temporarily. The combination of a high comparative base from Q3 and immediate cost inflation created a perfect storm for margin compression in Q4.
3. Increased Asset Impairment: The Company recorded asset impairment losses of CNY 1.38 billion in 2025, an increase of CNY 600 million YoY. Specifically, impairments related to new energy investments increased by over CNY 400 million, while inventory write-downs for the photovoltaic (PV) and storage businesses increased by nearly CNY 200 million. This increase reflects a conservative accounting stance in response to industry-wide price wars and rapid product iteration cycles. By proactively writing down older inventory and adjusting valuations for development projects, Sungrow is cleaning up its balance sheet, which may reduce future drag on earnings but impacts current period profitability.

*Note: 4Q24 figures are estimated based on full-year 2024 data and reported 4Q25 changes for comparative context.

The divergence between the strong full-year performance and the weak Q4 suggests that Sungrow’s core earnings power remains intact. The margin compression in Q4 is largely attributable to non-recurring timing effects and prudent accounting adjustments rather than a fundamental loss of competitiveness. For long-term investors, the focus should remain on the annualized margin expansion and the robust cash flow generation capabilities demonstrated throughout the year.

2. Segment Analysis: Inverters Stabilize, Storage Accelerates Globally

Sungrow’s dual-engine strategy, balancing its mature inverter business with its high-growth storage segment, continues to yield positive results. The distinct dynamics of each segment provide a hedge against market-specific volatilities.

A. Inverter Business: Strategic Optimization and Overseas Focus

The inverter segment, traditionally Sungrow’s cash cow, generated CNY 26.6 billion in revenue in 2025, a modest 4% YoY increase. While the growth rate appears muted, the underlying quality of this revenue has improved significantly.

• Shipment Volume and Market Dynamics: Total inverter shipments in 2025 reached 143 GW, a slight decline from the previous year. This decrease was not due to a loss of market share but rather a deliberate strategic decision. The domestic residential PV market in China has shrunk considerably due to policy shifts and grid connection bottlenecks. Sungrow chose to abandon projects with negative or negligible margins in this segment, prioritizing profitability over volume. This discipline is a hallmark of mature market leadership and protects the Company’s overall return on invested capital (ROIC).
• Margin Resilience: The inverter segment maintained a healthy gross margin of approximately 37%. This stability was achieved through two key drivers:
  1. Product Innovation: The launch of new, high-efficiency models allowed Sungrow to command premium pricing in segments where performance and reliability are paramount.
  2. Geographic Mix Shift: There was a notable increase in the proportion of overseas revenue. International markets, particularly in Europe, the Americas, and emerging markets in Asia-Pacific and the Middle East, generally offer higher margins than the fiercely competitive domestic Chinese market. By shifting its sales mix towards these regions, Sungrow effectively insulated its inverter margins from domestic price wars.

B. Energy Storage Systems (ESS): The Primary Growth Driver

The energy storage segment is rapidly becoming the dominant contributor to Sungrow’s top-line growth, reflecting the global surge in demand for grid-scale and commercial-industrial storage solutions.

• Revenue and Volume Surge: ESS revenue soared by 49% YoY to CNY 37.2 billion. Shipment volume reached 43 GWh, a 54% increase YoY. This outperformance relative to the inverter segment highlights the accelerating adoption of storage as a critical component of modern energy infrastructure.
• Global Demand and Brand Premium: The growth was fueled by robust global demand. Sungrow’s established brand reputation for safety, reliability, and grid-forming capabilities has allowed it to secure large-scale contracts in key international markets. The Company’s ability to integrate battery management, power conversion, and system-level control has created a moat that competitors find difficult to replicate.
• Domestic vs. Overseas Divergence: A granular look at shipments reveals a strategic pivot. Domestic storage shipments declined due to lower gross margins in the Chinese market, where intense competition has driven prices to unsustainable levels for some players. In contrast, overseas storage shipments surged by 90% YoY. This dramatic increase underscores Sungrow’s success in capturing high-value opportunities in markets such as the US, UK, Australia, and parts of Europe, where regulatory frameworks and electricity market structures favor profitable storage deployment.
• Margin Profile: The ESS segment achieved a gross margin of approximately 36.5%. While Q4 saw some pressure from raw material costs, the full-year margin remains strong. As the Company continues to scale its overseas presence and optimize its supply chain, we anticipate further margin stabilization and potential expansion in the ESS segment.

The synergy between the inverter and storage businesses is a key competitive advantage. Sungrow can offer integrated "PV + Storage" solutions, simplifying procurement and installation for customers while optimizing system performance. This bundling strategy enhances customer stickiness and allows for cross-selling opportunities, particularly in international markets where developers seek single-point responsibility for complex energy assets.

3. Innovation Pipeline: R&D Intensification and Product Leadership

Sungrow’s commitment to technological leadership is evidenced by its substantial investment in research and development. In 2025, R&D expenses totaled CNY 4.18 billion, a significant 31.97% increase YoY. This aggressive spending is not merely an expense but an investment in future market dominance, particularly in high-barrier segments like grid-forming technology and AI-integrated power systems.

Key Product Launches in 2025:

1. SG465HX String Inverter:

   • Significance: This is the world’s first string inverter with a power rating exceeding 400 kW.
   • Impact: By pushing the power density envelope, Sungrow reduces the Levelized Cost of Energy (LCOE) for utility-scale solar projects. Fewer units are required per megawatt, lowering installation, wiring, and maintenance costs. This product reinforces Sungrow’s position as the technology leader in the utility-scale segment, appealing to large independent power producers (IPPs) who prioritize efficiency and total cost of ownership.

2. 1+X 2.0 Modular Inverter:

   • Significance: The world’s first split-type modular inverter.
   • Impact: This architecture offers unprecedented flexibility and reliability. If one module fails, the others continue to operate, maximizing uptime. It also simplifies logistics and installation, as modules can be handled individually. This innovation addresses key pain points in large-scale deployments, particularly in remote or difficult-to-access locations.

3. PowerTitan 3.0 AC Intelligent Storage Platform:

   • Significance: Features a pioneering "Battery-Inverter-Station" three-level collaborative architecture.
   • Impact: Traditional storage systems often suffer from inefficiencies due to disjointed control between the battery management system (BMS), the power conversion system (PCS), and the station controller. PowerTitan 3.0 integrates these layers, enabling real-time optimization of charging/discharging cycles, thermal management, and grid interaction. This leads to higher round-trip efficiency, extended battery life, and enhanced safety—critical factors for bankability in international projects.

4. "Stem Cell Grid-Forming Technology 2.0" White Paper:

   • Significance: Publication of this white paper establishes Sungrow as a thought leader in grid stability.
   • Impact: As renewable penetration increases, grids become less stable due to the lack of inertia provided by traditional synchronous generators. Grid-forming inverters can mimic this inertia, providing voltage and frequency support. Sungrow’s "Stem Cell" technology allows individual inverters to act as autonomous grid-support units. By codifying this technology in a white paper, Sungrow is setting industry standards and educating regulators and utilities, thereby creating a favorable regulatory environment for its advanced products.

4. The AIDC Catalyst: Expanding into AI Data Center Power Solutions

Perhaps the most intriguing development in Sungrow’s 2025 narrative is its strategic entry into the AI Data Center (AIDC) power supply market. This move leverages the Company’s core competencies in power electronics to address a burgeoning demand driver: the massive energy requirements of AI computing infrastructure.

• Technology Lever: Solid State Transformers (SST):
  Sungrow is intensifying its R&D in SST technology. Unlike traditional transformers, SSTs offer precise control over voltage and current, higher efficiency, smaller footprint, and better integration with DC loads and renewable sources. These characteristics are ideal for modern data centers, which increasingly operate on DC power architectures and require ultra-reliable, high-density power distribution.

• Strategic Partnerships:
  The Company has already initiated technical exchanges with several leading international cloud service providers and top-tier domestic internet enterprises. While specific contract values have not been disclosed, the engagement with "head" (top-tier) clients validates the technical feasibility and commercial potential of Sungrow’s AIDC solutions.

• Market Opportunity:
  The proliferation of Large Language Models (LLMs) and AI training clusters is driving an exponential increase in data center power density. Traditional power infrastructure is struggling to keep up. Sungrow’s ability to provide integrated AC/DC conversion, backup power, and grid-interaction solutions positions it uniquely to capture a share of this high-margin market. The AIDC sector represents a diversification away from pure renewable energy cyclicality, offering a growth avenue tied to the secular trend of digitalization and AI adoption.

• Future Outlook:
  While currently in the early stages, the AIDC business has the potential to become a significant revenue pillar in the medium to long term. The synergies with Sungrow’s existing energy storage and inverter businesses are strong; for instance, data centers increasingly co-locate with renewable generation and storage to meet sustainability goals and ensure power reliability. Sungrow can offer a holistic "Green Data Center" solution, combining PV, storage, and advanced power distribution.

Risks / Headwinds

While Sungrow’s long-term outlook is positive, institutional investors must consider several key risks that could impact financial performance and stock valuation.

1. Energy Storage Demand Volatility

The Company’s growth trajectory is increasingly dependent on the energy storage segment. Any slowdown in global ESS demand could materially impact revenue growth.
* Policy Risk: Many storage projects are driven by government mandates or subsidies (e.g., the Inflation Reduction Act in the US, various EU directives). Changes in political leadership or fiscal priorities could delay or cancel incentives, reducing project economics.
* Grid Connection Delays: In key markets like the US and Europe, interconnection queues are long. Delays in grid approval can push revenue recognition into future periods, creating short-term earnings volatility.
* Competition: The ESS market is attracting new entrants from both the battery manufacturing side (e.g., CATL, BYD) and the inverter side. Increased competition could lead to price erosion, pressuring the 36.5% gross margin currently enjoyed by the segment.

2. Intensifying Market Competition

The solar inverter and storage industries are characterized by low barriers to entry for standard products, leading to fierce price competition, particularly in China.
* Price Wars: If competitors engage in aggressive pricing to gain market share, Sungrow may be forced to lower prices to maintain volume, potentially compressing margins. While the Company has shown discipline in exiting negative-margin projects, prolonged price wars could impact even profitable segments.
* Technological Disruption: The pace of innovation in power electronics is rapid. Failure to keep up with next-generation technologies (e.g., wide-bandgap semiconductors like SiC and GaN) could erode Sungrow’s technological edge.

3. Geopolitical and Trade Barriers

Sungrow derives a significant and growing portion of its revenue from overseas markets. This exposes the Company to geopolitical risks.
* Tariffs and Trade Restrictions: The US and EU have historically imposed tariffs on Chinese solar products. While Sungrow has mitigated some of this risk through local manufacturing or assembly partnerships, any expansion of trade barriers (e.g., stricter rules of origin, anti-subsidy investigations) could increase costs or limit market access.
* Data Security Concerns: As Sungrow expands into smart grid and AIDC solutions, concerns about data security and national security could arise, particularly in Western markets. Regulatory scrutiny on software and connectivity features could hinder sales.

4. Raw Material Price Fluctuations

The cost structure of inverters and storage systems is sensitive to the prices of key components such as IGBTs (Insulated Gate Bipolar Transistors), copper, aluminum, and lithium carbonate.
* Supply Chain Disruptions: Any disruption in the supply of semiconductors or battery cells could lead to production delays and increased costs.
* Margin Pressure: While Sungrow has some ability to pass on costs to customers, sudden spikes in raw material prices can temporarily compress margins, as seen in Q4 2025.

5. Execution Risk in New Ventures (AIDC)

The expansion into AIDC power solutions is a new frontier for Sungrow.
* Unproven Scale: While technical exchanges are promising, the commercial scaling of this business is unproven. Failure to secure major contracts or meet the stringent reliability standards of hyperscale data centers could result in sunk R&D costs without corresponding revenue.
* Competitive Landscape: The data center power market has established players (e.g., Vertiv, Eaton, Schneider Electric). Sungrow will need to demonstrate clear superior value propositions to displace or complement these incumbents.

Rating / Sector Outlook

Investment Rating: BUY (Maintained)

We maintain our BUY rating on Sungrow Power Supply. The Company’s strong brand, global distribution network, and technological leadership provide a durable competitive advantage. The recent pullback in 4Q25 earnings presents a buying opportunity for long-term investors, as the fundamental growth drivers remain intact. The stock is trading at a forward P/E of approximately 15x for 2026, which is reasonable given the projected earnings growth rate of 25.7% and the Company’s leading position in two high-growth sectors (renewables and storage).

Sector Outlook: Leading the Market

The broader Power Equipment and New Energy sector is expected to Outperform the broader market.
* Global Energy Transition: The imperative to decarbonize continues to drive investment in solar and wind capacity, necessitating corresponding investments in inverters and storage.
* Grid Modernization: Aging grid infrastructure in developed markets and rapid electrification in emerging markets create a sustained demand for grid-forming technologies and flexible transmission solutions.
* AI and Electrification: The convergence of AI infrastructure and electrification creates a new demand vector for power electronics, expanding the total addressable market for companies like Sungrow.

Valuation Analysis

• Relative Valuation: Compared to global peers in the inverter and storage space, Sungrow trades at a discount to its historical average P/E, despite maintaining higher growth rates. This discount likely reflects the market’s concern over short-term margin pressure and geopolitical risks. However, given the Company’s consistent execution and diversification into high-margin overseas markets, we believe this discount is unwarranted.
• DCF Sensitivity: Our Discounted Cash Flow (DCF) model, assuming a WACC of 8.5% and a terminal growth rate of 3%, supports a fair value significantly above the current trading price, implying substantial upside potential.

Investment View

Core Investment Logic

1. Structural Growth in Energy Storage: Sungrow is best positioned to capitalize on the global boom in energy storage. With overseas shipments growing at 90% and a strong brand premium, the Company is shifting its revenue mix towards higher-margin, more stable international markets. This structural shift will support margin expansion and earnings quality in the coming years.
2. Technological Moat: The Company’s heavy R&D investment (CNY 4.18 billion in 2025) is yielding tangible products like the SG465HX and PowerTitan 3.0. These innovations lower LCOE for customers and enhance grid stability, creating high switching costs and reinforcing Sungrow’s leadership. The "Stem Cell" grid-forming technology positions the Company as a critical enabler of high-renewable grids, a role that will become increasingly valuable.
3. Optionality in AIDC: The entry into AI Data Center power solutions provides a powerful second growth curve. This market is less cyclical than pure renewable energy and offers higher margins. Success in this arena could re-rate the stock, as investors begin to value Sungrow not just as a solar company, but as a critical infrastructure provider for the digital economy.
4. Financial Discipline: Management’s willingness to exit negative-margin domestic residential projects demonstrates a commitment to profitability over vanity metrics. This discipline, combined with prudent inventory management (evidenced by the Q4 impairments), suggests that future earnings will be of higher quality and more sustainable.

Strategic Recommendations for Institutional Investors

• Accumulate on Weakness: The Q4 2025 earnings miss has created a temporary dislocation in the stock price. We view this as an attractive entry point for long-only funds and strategic investors. The core business remains robust, and the long-term growth trajectory is unchanged.
• Monitor Overseas Margins: Investors should closely track the gross margin trends in the overseas storage segment. Sustained margins above 35% would confirm the success of the premium branding strategy and validate our earnings forecasts.
• Track AIDC Progress: While still early, any announcements regarding concrete contracts with major cloud providers or hyperscalers should be viewed as significant positive catalysts. This segment has the potential to drive multiple expansion.
• Hedge Geopolitical Risk: Given the exposure to international markets, investors should consider hedging strategies against potential trade policy shocks. However, Sungrow’s global manufacturing footprint and local partnerships provide some natural hedge.

Conclusion

Sungrow Power Supply stands at the forefront of the global energy transition. Despite short-term headwinds in Q4 2025, the Company’s strategic pivots towards high-margin overseas storage markets and innovative product lines have strengthened its competitive position. The addition of AIDC power solutions as a new growth vector further enhances its long-term prospects. With a robust balance sheet, strong cash flow generation, and a clear path to double-digit earnings growth, Sungrow represents a compelling investment opportunity in the renewable energy and infrastructure sector. We reaffirm our BUY rating, with confidence in the Company’s ability to deliver sustainable shareholder value in the 2026-2028 period.

Appendix: Detailed Financial Forecasts and Assumptions

Revenue Forecast Breakdown

Our revenue projections for 2026-2028 are based on the following assumptions:

• Inverter Segment: We assume a moderate growth rate of 5-8% annually, driven by volume growth in emerging markets and steady replacement demand in mature markets. The focus remains on value over volume, with ASPs stabilizing as low-margin projects are excluded.
• Energy Storage Segment: We project a CAGR of 25-30% for the next three years. This is supported by the continued decline in battery costs, increasing regulatory mandates for storage attachment in new renewable projects, and the growing economic viability of arbitrage and ancillary services in key electricity markets. Overseas growth is expected to outpace domestic growth.
• New Energy Investment: Revenue from this segment is expected to grow steadily but at a slower pace than equipment sales, as the Company focuses on asset recycling and operational efficiency rather than aggressive expansion.
• AIDC and Other: We include a modest contribution from AIDC power solutions starting in 2027, ramping up in 2028 as partnerships mature into commercial deployments.

Margin Assumptions

• Gross Margin: We forecast a gradual expansion in gross margin from 31.83% in 2025 to 32.6% in 2026, 32.8% in 2027, and 32.5% in 2028. This is driven by:
  • Higher mix of overseas storage sales.
  • Economies of scale in manufacturing.
  • Cost reductions from technological improvements (e.g., higher efficiency inverters requiring fewer components per watt).
  • Partial offset from potential raw material volatility and competitive pricing pressure.
• Operating Expenses: R&D expenses are expected to remain elevated as a percentage of revenue (around 4.5-5%) to support innovation in AIDC and grid-forming technologies. Sales and administrative expenses are expected to grow in line with revenue, benefiting from operating leverage.

Cash Flow and Balance Sheet Strength

Sungrow’s balance sheet remains robust, with a strong cash position (CNY 22.8 billion in 2025) and manageable debt levels. The Company generates strong operating cash flows (CNY 16.9 billion in 2025), which fund its R&D and capital expenditure needs without excessive reliance on external financing. We expect free cash flow to improve further in 2026-2028 as working capital efficiency improves and capital expenditure intensity normalizes.

Note: Free Cash Flow is estimated as Operating Cash Flow minus Capital Expenditures (approximated by Investing Cash Flow adjustments).

The strong cash generation capability supports potential dividend increases and share buybacks, enhancing shareholder returns. It also provides the financial flexibility to pursue strategic acquisitions or partnerships in the AIDC and emerging technology spaces.

Final Note on Methodology

This report is based on publicly available information, including Sungrow’s 2025 annual report, industry data, and analyst consensus estimates. Our financial models incorporate sensitivity analysis for key variables such as exchange rates, raw material costs, and shipment volumes. The "Buy" rating reflects our conviction that the market has overly penalized the stock for short-term Q4 issues, ignoring the robust long-term growth drivers and strategic positioning of the Company. Investors are advised to conduct their own due diligence and consider their individual risk tolerance before making investment decisions.

Analyst Contact:
He Zhaohui
SAC Practice Certificate Number: S0910525030003
Email: hezhaohui@huajinsc.cn
Huajin Securities Institute

Disclaimer:
This report is for informational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities. The opinions expressed herein are subject to change without notice. Huajin Securities Co., Ltd. and its affiliates may have positions in the securities mentioned and may perform investment banking or other services for them. Past performance is not indicative of future results.