Sungrow Power Supply (300274.SZ): Energy Storage Surge and AIDC Expansion Unlock New Growth Horizons

Date: September 27, 2025
Rating: BUY (Initiation)
Current Price: CNY 157.50
Target Price Implied Upside: >20% (Based on "Buy" rating definition)
Analysts: Zhang Han, Luo Dixiao | Huaxin Securities

Executive Summary

Sungrow Power Supply Co., Ltd. (300274.SZ), a global leader in solar inverters and energy storage systems, is undergoing a significant structural transformation driven by the explosive growth of its energy storage business and strategic entry into the Artificial Intelligence Data Center (AIDC) power supply sector. Following a robust first half of 2025, characterized by a 40% year-over-year (YoY) revenue increase and a 56% YoY surge in net profit, the company demonstrates strong operational momentum and improving profitability metrics.

This report initiates coverage with a BUY rating. Our investment thesis rests on three core pillars:
1. Dominance in Energy Storage: The energy storage system segment has emerged as the primary growth engine, recording a 128% YoY revenue increase in 1H2025. Supported by strong global demand and technological leadership exemplified by the new PowerTitan 3.0 AC platform, this segment is reshaping Sungrow’s revenue mix and margin profile.
2. Strategic Entry into AIDC Power: Leveraging decades of expertise in power electronics and conversion technology, Sungrow has established a dedicated AIDC business unit. This move capitalizes on the surging global demand for green, high-efficiency power solutions for data centers, offering a substantial new total addressable market (TAM) beyond traditional renewable energy applications.
3. Valuation Attractiveness: Despite the strong growth trajectory, the stock trades at a forward P/E of approximately 22.9x for 2025E and 18.1x for 2027E. Given the company’s consistent earnings growth, superior return on equity (ROE), and expanding moat in both storage and emerging AI infrastructure, we believe the current valuation does not fully reflect its long-term growth potential.

We project revenues of CNY 97.5 billion, CNY 109.2 billion, and CNY 122.9 billion for 2025, 2026, and 2027, respectively, with corresponding net profits attributable to shareholders of CNY 14.27 billion, CNY 16.05 billion, and CNY 18.06 billion. The company’s ability to maintain gross margins above 30% while scaling rapidly underscores its competitive advantage in cost management and product premiumization.

Key Takeaways

1. Robust Financial Performance in 1H2025: Quality Growth Amidst Scale

Sungrow’s financial results for the first half of 2025 highlight a period of high-quality growth, where top-line expansion was accompanied by significant bottom-line improvement.

• Revenue Acceleration: The company reported H1 2025 revenue of CNY 43.53 billion, representing a 40% YoY growth. This acceleration marks a decisive shift from the single-digit growth observed in previous cycles, driven primarily by the global adoption of renewable energy integration solutions.
• Profitability Outperformance: Net profit attributable to shareholders reached CNY 7.73 billion, surging 56% YoY. The profit growth rate significantly outpaced revenue growth, indicating operating leverage and improved product mix.
• Margin Expansion:
  • Gross Margin: Improved by 1.94 percentage points (pct) YoY to 34.36%. This expansion is notable given the competitive landscape, suggesting successful cost pass-through mechanisms and a shift towards higher-margin storage solutions.
  • Net Margin: Increased by 1.78 pct YoY to 17.77%. This reflects not only gross margin improvement but also effective control over operating expenses relative to sales growth.

Source: Company Reports, Huaxin Securities Research

The divergence between revenue and profit growth rates suggests that Sungrow is successfully navigating the price pressures often seen in the photovoltaic (PV) industry by leveraging its diversified portfolio. The higher margin contribution from the energy storage segment is a key driver of this profitability enhancement.

2. Segment Analysis: Storage as the New Core, Inverters as the Cash Cow

The breakdown of Sungrow’s business segments reveals a pivotal transition. While the traditional PV inverter business remains stable and profitable, the energy storage system (ESS) business has scaled to become the largest revenue contributor, fundamentally altering the company’s risk-return profile.

A. Energy Storage Systems: The Hyper-Growth Engine

In 1H 2025, the Energy Storage System segment generated CNY 17.8 billion in revenue, a staggering 128% YoY increase. This segment now accounts for approximately 41% of total revenue, up from roughly 25-30% in prior periods, signaling a successful diversification strategy.

• Market Position & Brand Equity: Sungrow has cultivated a strong brand reputation in the global storage market. The company’s deep engagement in early-stage market development has resulted in high customer stickiness and recognition, particularly in mature markets like Europe and North America, as well as emerging hubs in the Middle East and Asia-Pacific.
• Technological Leadership: The continuous R&D investment has yielded tangible product advantages. The recent launch of the PowerTitan 3.0 AC Intelligent Storage Platform is a testament to this innovation. The "Plus" version of this platform offers a capacity of 12.5 MWh, setting a new industry benchmark for energy density and integration efficiency. Higher energy density translates to lower balance-of-system (BOS) costs for customers, enhancing Sungrow’s value proposition beyond mere hardware supply.
• Margin Resilience: Despite the rapid scale-up, the gross margin for the storage segment remained stable at 39.92%, with only a marginal decline of 0.16 pct YoY. This stability is crucial; it indicates that the company is not engaging in destructive price wars to gain market share but is instead competing on technology, reliability, and full-lifecycle service value. A nearly 40% gross margin in the hardware-intensive storage sector is exceptional and underscores Sungrow’s supply chain mastery and premium positioning.

B. PV Inverters & Power Electronics: Steady Foundation

The PV inverter and related power electronic conversion equipment segment generated CNY 15.3 billion in revenue in 1H 2025, growing 17% YoY.

• Mature Growth Trajectory: The 17% growth rate reflects the steady, albeit slower, expansion of the global solar installation base. As a mature market leader, Sungrow’s inverter business serves as a reliable cash flow generator, funding R&D for newer ventures like storage and AIDC.
• Margin Dynamics: The gross margin for this segment stood at 35.74%, a decrease of 1.88 pct YoY. This slight compression is consistent with broader industry trends where inverter prices have faced downward pressure due to intense competition and component cost fluctuations. However, a 35.7% margin remains healthy and indicative of a strong competitive moat. The company’s ability to maintain margins above 35% in a commoditizing segment highlights its scale advantages and brand premium.

C. Synergies Between Segments

The co-existence of these two dominant segments creates powerful synergies:
1. Shared Supply Chain: Both inverters and storage systems rely heavily on similar power electronic components (IGBTs, capacitors, PCBs). Sungrow’s massive procurement volume allows for superior bargaining power with suppliers, mitigating raw material cost inflation risks.
2. Integrated Solutions: Customers increasingly prefer bundled "Solar + Storage" solutions. Sungrow’s leadership in both areas allows it to offer optimized, seamlessly integrated systems, reducing installation complexity and improving overall system efficiency for end-users. This "one-stop-shop" capability is a significant differentiator against pure-play inverter or battery manufacturers.

3. Strategic Pivot: Layout in AIDC Power Supply

Perhaps the most forward-looking aspect of Sungrow’s strategy is its entry into the Artificial Intelligence Data Center (AIDC) power supply market. This move represents a logical extension of its core competencies into a high-growth, high-value adjacent sector.

The Macro Driver: AI and Energy Convergence

The global rollout of generative AI and large language models has triggered an unprecedented build-out of data centers. Unlike traditional data centers, AI-driven facilities require:
* Massive Power Density: AI chips consume significantly more power per rack than traditional servers.
* High Reliability: Any power interruption can result in massive financial losses and model training setbacks.
* Green Energy Integration: Tech giants (hyperscalers) have committed to aggressive carbon neutrality goals, necessitating the integration of renewable energy sources directly into data center operations.

This creates a critical bottleneck: Grid constraints and the need for efficient, green power management.

Sungrow’s Competitive Advantage in AIDC

Sungrow is uniquely positioned to address these challenges due to its technological heritage:

1. Power Electronics Expertise: At its core, Sungrow is a power conversion company. The technologies used to convert DC solar power to AC grid power, and to manage battery charging/discharging, are directly applicable to data center power supplies (UPS, HVDC, rectifiers). The company possesses deep "technical precipitation" in high-efficiency, high-reliability power conversion.
2. Green Energy One-Stop Solution: Sungrow can offer a holistic package: Solar Generation + Energy Storage + Data Center Power Supply. This integrated approach allows data center operators to source clean energy, store it for peak shaving or backup, and distribute it efficiently within the facility. This aligns perfectly with the ESG mandates of major cloud providers.
3. Established AIDC Business Unit: The company has formally established an AIDC Business Department, signaling serious commitment. The initial focus is on overseas markets, where energy costs are higher, grid instability is a concern, and ESG regulations are stricter. This geographic focus leverages Sungrow’s existing international sales network and service infrastructure.

Future Growth Potential

While currently in the early stages, the AIDC power supply business has the potential to become a third major growth pillar. The total addressable market for data center power infrastructure is expanding rapidly alongside AI compute demand. By capturing even a small single-digit percentage of this market, Sungrow could add billions in high-margin revenue. This diversification also reduces the company’s cyclicality exposure to the purely renewable energy installation cycle.

4. Financial Forecast and Valuation Analysis

Based on the strong 1H 2025 performance and the strategic drivers outlined above, we have updated our financial projections for Sungrow Power Supply.

Revenue and Earnings Projections (2025-2027)

We anticipate sustained double-digit growth over the next three years, driven by the compounding effect of storage adoption and the gradual contribution from AIDC solutions.

Source: Huaxin Securities Research Estimates

• 2025 Outlook: We project a 25.2% revenue growth to CNY 97.5 billion. This assumes continued strong momentum in storage shipments in the second half of the year and a recovery in certain PV markets. Net profit is expected to grow faster at 29.3%, reaching CNY 14.27 billion, supported by operational efficiencies and favorable product mix.
• 2026-2027 Outlook: Growth stabilizes to a robust 12-13% range. As the base effect diminishes and the market matures, the focus shifts to sustainable profitability. The AIDC business is expected to start contributing meaningfully to revenue growth in this period, offsetting any potential slowdown in traditional PV/Storage growth rates.
• Profitability Trends: We forecast gross margins to stabilize around 30.2-30.4%. While this is slightly lower than the 1H 2025 peak of 34.36%, it reflects a normalized annual average considering potential seasonal variations and competitive dynamics. Net margins are projected to improve slightly to 15.0%, driven by scale effects in R&D and sales expenses.
• Return on Equity (ROE): ROE remains exceptionally high, projected at 27.2% for 2025. Although it gradually declines to 22.0% by 2027 due to equity base expansion from retained earnings, it remains well above the cost of capital, indicating efficient capital allocation.

Valuation Metrics

At the current share price of CNY 157.50, Sungrow trades at attractive multiples relative to its growth profile.

• P/E Compression: The forward P/E ratio drops from 22.9x in 2025 to 18.1x in 2027. For a company growing earnings at nearly 30% in 2025 and maintaining double-digit growth thereafter, a P/E below 20x is compelling. Peer comparisons in the global power electronics and renewable infrastructure space often command premiums for such consistent execution.
• PEG Ratio: Using the 2025E P/E of 22.9x and the 2025E earnings growth rate of 29.3%, the PEG ratio is approximately 0.78. A PEG below 1.0 typically suggests undervaluation relative to growth potential.
• Cash Flow Strength: The company generates robust operating cash flows (CNY 12.07 billion in 2024A, projected CNY 11.62 billion in 2025E despite working capital increases). This liquidity supports ongoing R&D, potential M&A in the AIDC space, and shareholder returns, further de-risking the investment.

Risks / Headwinds

While the investment case for Sungrow is strong, institutional investors must consider several key risks that could impact financial performance and stock valuation.

1. Demand Volatility in Photovoltaic and Storage Markets

• Policy Dependency: The renewable energy sector remains heavily influenced by government subsidies, tax credits (e.g., IRA in the US, REPowerEU in Europe), and grid connection policies. Any rollback or delay in these incentives could dampen short-term demand.
• Grid Congestion: In key markets like Europe and parts of the US, grid infrastructure upgrades are lagging behind renewable installation rates. This can lead to curtailment issues and delayed project commissions, affecting Sungrow’s shipment schedules and revenue recognition.
• Inventory Corrections: If downstream developers overestimate demand, inventory corrections could lead to order cancellations or delays, impacting quarterly revenue visibility.

2. Execution Risk in AIDC Business

• New Market Entry: The AIDC power supply market has established incumbents (e.g., Vertiv, Eaton, Schneider Electric). Sungrow is a new entrant in this specific niche. Success depends on its ability to convince conservative data center operators to adopt its solutions for mission-critical infrastructure.
• Technology Adaptation: While the underlying power electronics technology is similar, AIDC requires ultra-high reliability and specific form factors. Failure to meet stringent technical specifications or certification requirements could delay market penetration.
• Revenue Contribution Timeline: The AIDC business is in its early stages. It may take several years before it contributes significantly to overall revenue and profits. Investors expecting immediate financial impact may be disappointed.

3. Intensifying Competition

• Price Wars: The inverter and storage markets are becoming increasingly crowded, with new entrants from China and established players globally. Aggressive pricing strategies by competitors could erode Sungrow’s gross margins, particularly in the inverter segment where differentiation is harder.
• Battery Supply Chain: For the storage business, reliance on battery cell suppliers (e.g., CATL, BYD) creates dependency. If battery prices rise or supply becomes constrained, Sungrow’s margins could be squeezed unless it can fully pass costs to customers.

4. Geopolitical and Trade Risks

• Tariffs and Trade Barriers: As a Chinese company with significant overseas revenue (often >50%), Sungrow is exposed to trade tensions. Potential tariffs in the US, EU, or India on Chinese renewable energy products could increase costs or reduce competitiveness.
• Supply Chain Decoupling: Efforts by Western nations to decouple supply chains from China could force Sungrow to localize manufacturing outside China, increasing capital expenditure and operational complexity.
• Regulatory Scrutiny: Data security concerns related to smart inverters and storage systems could lead to stricter regulatory hurdles in sensitive markets.

5. Raw Material Price Fluctuations

• Component Costs: Key components such as IGBTs, copper, aluminum, and lithium carbonate are subject to commodity price cycles. Significant increases in these input costs, if not hedged or passed through, would negatively impact gross margins.
• Logistics Costs: Global shipping rates and logistics disruptions can affect the landed cost of exports, influencing profitability in overseas markets.

6. Systemic Market Risks

• Macroeconomic Downturn: A global recession could reduce capital expenditure by utilities and commercial/industrial customers, delaying renewable energy projects.
• Interest Rates: High interest rates increase the cost of financing for renewable energy projects, potentially reducing their internal rate of return (IRR) and slowing down new installations.
• Equity Market Sentiment: Broader market volatility or a shift in investor preference away from growth stocks could compress valuation multiples regardless of fundamental performance.

Rating / Sector Outlook

Sector Outlook: Renewable Energy & Storage – Positive with Structural Shifts

The global energy transition is entering a new phase characterized by integration and intelligence.
1. From Generation to Storage: The focus is shifting from pure solar/wind capacity addition to the integration of storage to ensure grid stability. This favors companies like Sungrow that have strong footholds in both domains.
2. Electrification of Load: The rise of EVs and AI data centers is creating new, massive electricity demand vectors. This reinforces the long-term secular growth story for electrical equipment and power management solutions.
3. Consolidation: The industry is likely to see consolidation, with leaders gaining market share due to their ability to offer bankable, integrated solutions. Sungrow’s scale and brand make it a likely beneficiary of this trend.

Investment Rating: BUY (Initiation)

We initiate coverage of Sungrow Power Supply (300274.SZ) with a BUY rating.

• Rationale:

  • Strong Momentum: 1H 2025 results confirm the company’s ability to deliver high-quality growth with expanding margins.
  • Structural Growth Drivers: The energy storage business is no longer just a supplement; it is a core driver with >100% growth potential in the near term.
  • Optionality Value: The AIDC business provides a valuable call option on the AI infrastructure boom, diversifying revenue streams and enhancing long-term valuation potential.
  • Attractive Valuation: Trading at ~23x 2025E P/E, the stock offers a favorable risk-reward profile for long-term investors, especially given the projected EPS CAGR of ~15-20% over the next three years.

• Target Price Implication: Based on the "Buy" rating criteria (>20% upside from current price of CNY 157.50), the implied target price is >CNY 189.00. This valuation is supported by applying a peer-average multiple to our 2026E EPS, accounting for Sungrow’s premium growth profile and market leadership.

Investment View

1. The "Second Curve" is Here: Storage is Not Just a Side Business

For years, investors viewed Sungrow primarily as an inverter company with a nascent storage arm. The 1H 2025 data decisively refutes this notion. With storage revenue reaching CNY 17.8 billion in just six months and growing at 128%, it is clear that Sungrow has successfully executed its "Second Curve" strategy.

Investment Implication: Investors should re-rate Sungrow from a "PV Inverter Player" to a "Global Energy Storage & Integration Leader." Storage companies typically command higher valuation multiples than pure inverter manufacturers due to the larger TAM and higher barriers to entry (system integration, safety, software). As the storage mix continues to rise, Sungrow’s composite valuation multiple should expand.

2. AIDC: The Hidden Gem in the AI Supply Chain

While much attention is paid to GPU makers and chip foundries in the AI theme, the power infrastructure is a critical, under-appreciated bottleneck. AI data centers are essentially massive power plants with computing loads.

Sungrow’s entry into this space is not a diversification distraction but a strategic synergy.
* Technical Fit: The company’s expertise in high-power DC/AC conversion and thermal management is directly transferable.
* Customer Overlap: Many of Sungrow’s existing large-scale industrial and utility customers are also investing in private data centers or edge computing facilities.
* Green Premium: In a world where "Green AI" is becoming a marketing and regulatory necessity, Sungrow’s ability to provide a solar-storage-AIDC integrated solution is a unique selling proposition (USP) that Western competitors like Vertiv cannot easily replicate without partnering with renewable firms.

Investment Implication: The AIDC business acts as a valuation catalyst. Even if it contributes modestly to earnings in 2025-2026, the mere presence in this high-growth narrative can help sustain investor interest and support higher multiples during market rallies focused on AI infrastructure.

3. Financial Health and Capital Allocation

Sungrow’s balance sheet is robust, with significant cash reserves (CNY 19.8 billion in 2024A, projected to grow to CNY 27.9 billion in 2025E) and manageable debt levels (Asset-Liability Ratio declining from 65.1% to 55.2% by 2027E).

• R&D Sustainability: The company continues to invest heavily in R&D (projected CNY 3.96 billion in 2025E). This spending is crucial for maintaining technological leadership in both storage (e.g., PowerTitan 3.0) and AIDC.
• Shareholder Returns: With strong free cash flow generation, there is potential for increased dividend payouts or share buybacks in the future, which would further enhance total shareholder return.

4. Navigating the Geopolitical Landscape

Sungrow’s global footprint is both its greatest strength and its primary risk vector. The company has been proactive in localizing services and potentially manufacturing to mitigate trade risks.

Investment Implication: Monitor the company’s progress in establishing non-China manufacturing bases (e.g., in Hungary, India, or Southeast Asia). Successful localization will de-risk the revenue stream and allow Sungrow to continue accessing protected markets like the US and EU. The current resilience of margins despite trade tensions suggests management is effectively navigating these challenges.

5. Comparative Advantage vs. Peers

When compared to global peers:
* Vs. Huawei Digital Power: Sungrow is a pure-play public entity, offering clearer transparency and focus. Huawei is broader and unlisted.
* Vs. Tesla Energy: Sungrow has a more diversified geographic reach and a stronger foothold in utility-scale projects, whereas Tesla is stronger in residential/commercial in some regions. Sungrow’s margin profile in storage is currently competitive with or superior to many hardware-only competitors.
* Vs. Traditional UPS Providers (Vertiv, Eaton): Sungrow brings the "Green" angle and cost efficiency of Chinese manufacturing, which is increasingly attractive as data center operators look to reduce CapEx and meet sustainability targets.

Conclusion

Sungrow Power Supply stands at a confluence of powerful secular trends: the global energy transition, the electrification of society, and the AI-driven demand for power infrastructure. The company has demonstrated exceptional execution in pivoting from a pure inverter maker to a comprehensive energy storage and power solutions provider.

The 1H 2025 results validate this transition, showing strong growth, margin expansion, and robust cash flow. The strategic layout in AIDC power supply opens a new, high-potential growth avenue that leverages the company’s core competencies.

While risks related to geopolitics and competition persist, Sungrow’s market leadership, technological depth, and financial strength provide a solid buffer. At current valuation levels, the stock offers an attractive entry point for institutional investors seeking exposure to the renewable energy and AI infrastructure themes with a company that has proven its ability to deliver consistent, high-quality growth.

We recommend accumulating shares on weakness, with a long-term horizon to capture the full value of the storage expansion and AIDC emergence.

Appendix: Detailed Financial Tables

Income Statement Forecast (CNY Million)

Balance Sheet Forecast (CNY Million)

Cash Flow Statement Forecast (CNY Million)

Key Financial Ratios

Analyst Certification and Disclosure

Analyst Certification:
The analysts named in this report, Zhang Han (S1050521110008) and Luo Dixiao (S1050525070001), certify that they have the requisite securities investment consulting qualifications registered with the Securities Association of China. They declare that the views expressed in this report accurately reflect their personal, independent, and objective research opinions. They confirm that they have not received, nor will they receive, any direct or indirect compensation linked to the specific recommendations or views contained herein.

Investment Rating Definitions:
* Buy: Expected relative return > 20% against the relevant market index over the next 12 months.
* Outperform: Expected relative return between 10% and 20%.
* Neutral: Expected relative return between -10% and 10%.
* Sell: Expected relative return < -10%.

Market Index Benchmarks:
* A-Shares: CSI 300 Index
* HK Stocks: Hang Seng Index
* US Stocks: Dow Jones Industrial Average

Disclaimer:
This report is produced by Huaxin Securities Co., Ltd. and is intended solely for the use of its clients. The information contained herein is derived from public sources believed to be reliable, but Huaxin Securities makes no representation or warranty, express or implied, regarding its accuracy or completeness. The opinions and estimates provided are subject to change without notice. This report does not constitute an offer to sell or a solicitation of an offer to buy any securities. Investors should conduct their own independent assessment and consult with professional advisors as needed. Huaxin Securities and its affiliates may hold positions in the securities mentioned and may engage in trading activities. Unauthorized reproduction or distribution of this report is strictly prohibited.

End of Report