Sungrow Power Supply: Storage Revenue Doubles, Profitability Accelerates – Maintaining "Buy"

Date: August 29, 2025
Ticker: 300274.SZ (Shenzhen Stock Exchange)
Current Price: CNY 99.87
Market Cap: CNY 207.1 Billion
Rating: BUY (Maintained)
Target Price Implied Upside: Significant upside based on 14x forward P/E and robust earnings growth trajectory.

Executive Summary

Sungrow Power Supply Co., Ltd. ("Sungrow" or the "Company"), a global leader in solar inverters and energy storage systems (ESS), has delivered exceptional financial results for the first half of 2025 (1H25), reinforcing its position as a dominant force in the global renewable energy infrastructure sector. The Company reported a total revenue of CNY 43.53 billion in 1H25, representing a year-over-year (YoY) increase of 40.34%. More importantly, net profit attributable to shareholders surged by 55.97% YoY to CNY 7.735 billion, significantly outpacing top-line growth. This divergence highlights a structural improvement in profitability, driven by a favorable product mix shift towards high-margin energy storage solutions and operational efficiencies.

The core investment thesis for Sungrow rests on three pillars:
1. Explosive Growth in Energy Storage: The ESS segment revenue doubled YoY to CNY 17.8 billion in 1H25, becoming the primary growth engine. With gross margins sustaining near 40%, this segment is not only driving scale but also enhancing overall corporate profitability.
2. Resilient Inverter Leadership: Despite a mature market environment, the solar inverter business grew steadily by 17.06% YoY. The launch of next-generation products, such as the SG465HX string inverter and the 1+X 2.0 modular system, ensures Sungrow maintains its technological moat and pricing power, particularly in high-value markets like Europe and North America.
3. Strategic Diversification into AIDC: Leveraging its core competencies in power electronics, Sungrow is aggressively entering the Artificial Intelligence Data Center (AIDC) power supply market. This new vertical represents a potential "third growth pole," targeting high-end overseas markets with innovative DC microgrid solutions.

We maintain our "BUY" rating on Sungrow. We project net profits attributable to shareholders of CNY 14.9 billion, CNY 16.0 billion, and CNY 17.8 billion for 2025, 2026, and 2027, respectively. At the current share price of CNY 99.87, the stock trades at approximately 14x, 13x, and 12x forward P/E ratios, respectively. Given the Company’s consistent execution, superior margin profile compared to peers, and expanding total addressable market (TAM) in storage and AI infrastructure, we believe the current valuation does not fully reflect its long-term earnings potential.

Key Takeaways

1. Financial Performance: Robust Top-Line Growth Coupled with Margin Expansion

Sungrow’s 1H25 financial results demonstrate a high-quality growth trajectory characterized by strong revenue acceleration and significant margin expansion.

Revenue and Profit Analysis:
* Total Revenue: Reached CNY 43.533 billion in 1H25, up 40.34% YoY. This growth rate indicates a successful capture of global demand for renewable energy integration solutions, outperforming the broader industry average which has faced headwinds from inventory corrections in certain regions.
* Net Profit Attributable to Shareholders: Totaled CNY 7.735 billion, a 55.97% YoY increase.
* Deducted Non-Recurring Net Profit: Amounted to CNY 7.495 billion, up 53.52% YoY, confirming that the profit surge is driven by core operational performance rather than one-off gains.
* Adjusted Profitability: When adding back CNY 690 million in asset impairment losses and CNY 180 million in share-based incentive expenses, the adjusted net profit for 1H25 stands at approximately CNY 8.608 billion. This adjustment provides a clearer view of the underlying cash-generating capability of the business.

Quarterly Breakdown (2Q25):
The momentum continued into the second quarter. In 2Q25 alone, Sungrow generated revenue of CNY 24.497 billion (+33.09% YoY) and net profit of CNY 3.908 billion (+36.53% YoY). The slight deceleration in Q2 growth rates compared to H1 averages is typical of seasonal patterns but remains robust in absolute terms.

Margin Trends:
* Gross Margin: Improved to 34.36% in 1H25, an increase of 1.94 percentage points (pct) YoY. This expansion is primarily attributed to the higher proportion of revenue coming from the Energy Storage Systems (ESS) business, which carries higher margins than traditional inverters, as well as favorable raw material costs and economies of scale.
* Net Margin: Rose to 17.99%, up 1.72 pct YoY. This indicates effective control over operating expenses (SG&A) relative to revenue growth, showcasing strong operational leverage.

(Note: 1H2024 figures derived from YoY growth rates provided in the report)

2. Business Segment Analysis: The Dual-Engine Drive

Sungrow’s business model is increasingly balanced between its legacy Solar Inverter business and its rapidly scaling Energy Storage Systems (ESS) business. This diversification mitigates reliance on any single market dynamic.

A. Energy Storage Systems (ESS): The Primary Growth Catalyst

The ESS segment has emerged as the standout performer, validating the Company’s strategic pivot towards integrated energy solutions.

• Revenue Surge: ESS revenue reached CNY 17.803 billion in 1H25. While the specific YoY percentage was omitted in the summary text, the headline "Storage Business Doubles Growth" and the context imply a ~100% YoY increase (or close to it), making it the fastest-growing segment. This aligns with the global trend where storage deployment is accelerating faster than solar PV installation due to grid stability requirements.
• Profitability Resilience: The gross margin for the ESS segment stood at 39.92%, a remarkably high level for hardware-intensive businesses. Although this represents a slight decline of 0.16 pct YoY, it remains significantly higher than the inverter segment’s margin. The stability of margins despite rapid scale-up suggests strong pricing power and effective cost management in the supply chain.
• Volume Guidance: Sungrow maintains its full-year shipment guidance of 40-50 GWh. Given the strong 1H performance, achieving the upper end of this guidance appears feasible. This volume translates to significant market share retention in key regions.
• Market Outlook & Synergy: The report highlights a conservative estimated Compound Annual Growth Rate (CAGR) of 20% for the global storage market over the next few years, with an optimistic scenario of 30%. This structural growth is underpinned by the intermittent nature of renewable energy. As solar and wind penetration increases in Europe and the US, the need for storage to smooth output and provide ancillary services becomes critical. Conversely, storage assets require cheap renewable energy to charge economically. This symbiotic relationship ensures sustained demand.
• Geographic Focus: The US market remains a crucial profit center for Sungrow’s storage business. Despite policy uncertainties, the fundamental need for grid modernization and capacity addition persists. Sungrow’s ability to navigate policy changes and maintain supply chains (via its Thailand factory for US-bound goods) is a key competitive advantage.

B. Solar Inverters: Steady Growth Through Innovation

While the ESS segment grabs headlines, the solar inverter business remains the cash cow, providing stable cash flows and brand recognition.

• Revenue Performance: Inverter revenue totaled CNY 15.327 billion in 1H25, growing 17.06% YoY. This steady double-digit growth in a maturing market demonstrates Sungrow’s ability to gain share from competitors and expand into new geographic pockets.
• Margin Dynamics: Gross margin for inverters was 35.74%, down 1.88 pct YoY. This slight compression may reflect increased competition in standard string inverters or changes in product mix. However, a 35%+ margin remains industry-leading, indicating premium branding and technological superiority.
• Product Leadership: Sungrow continues to lead in technical innovation, which is critical for maintaining margins. Key launches in 1H25 include:
  • SG465HX: The world’s first 400kW+ string inverter. This product targets utility-scale projects, offering higher power density and lower Levelized Cost of Energy (LCOE) for developers.
  • 1+X 2.0 Modular Inverter: A split-type modular design that enhances reliability and ease of maintenance. This architecture reduces downtime and O&M costs for customers, creating a sticky value proposition.
• Global Footprint: The Company is actively expanding in Europe, the Americas, Asia-Pacific, the Middle East, Africa, and China. The diversified geographic presence reduces dependency on any single regulatory regime. Specifically, shipments to the US via the Thailand facility are proceeding normally, mitigating immediate trade barrier risks.

C. AIDC (Artificial Intelligence Data Centers): The Emerging Third Pole

In a strategic move to leverage its core competency in power conversion, Sungrow has established a dedicated AIDC Business Unit. This marks a significant diversification beyond traditional renewable energy.

• Strategic Rationale: AI data centers have immense power density requirements and are increasingly seeking direct current (DC) microgrid solutions to improve efficiency and reduce conversion losses. Sungrow’s expertise in high-voltage and low-voltage power conversion, as well as cabinet-level power supplies, positions it uniquely to serve this niche.
• Market Focus: The initial focus is on high-end overseas markets, where AI infrastructure build-out is most aggressive (e.g., North America, Europe). These markets are less price-sensitive and more focused on reliability and efficiency, aligning with Sungrow’s premium positioning.
• Product Offering: The Company plans to provide innovative solutions for DC microgrids, covering:
  • High-voltage side integration.
  • Low-voltage distribution.
  • In-cabinet power modules.
• Investment Implication: While currently small in revenue contribution, the AIDC segment offers a high-margin, high-growth adjacency. It transforms Sungrow from a pure-play renewable energy supplier to a broader "critical power infrastructure" provider, potentially commanding a higher valuation multiple in the long term.

3. Operational Efficiency and Balance Sheet Strength

Sungrow’s financial health remains robust, supporting its aggressive expansion and R&D investments.

• Cash Flow Generation: Operating cash flow has been strong, allowing the Company to self-fund much of its growth. The balance sheet shows a healthy accumulation of cash reserves, projected to grow from CNY 19.8 billion in 2024 to CNY 28.87 billion in 2025E.
• Asset Quality: Inventory levels are managed prudently relative to sales growth. In 1H25, inventory stood at CNY 29.03 billion (2024A), projected to rise moderately to CNY 29.53 billion in 2025E, indicating efficient working capital management despite scaling production.
• Debt Profile: The Company maintains a manageable debt structure. Short-term borrowings are modest relative to cash holdings, reducing liquidity risk. The net debt ratio is projected to improve from 186.3% in 2024 to 146.5% in 2025E, reflecting stronger equity accumulation from retained earnings.

Risks / Headwinds

While the outlook is positive, institutional investors must consider the following risks that could impact Sungrow’s performance and valuation:

1. Global Demand Volatility

• Solar & Storage Slowdown: The core assumption of 20-30% CAGR in storage and steady solar growth relies on continued government subsidies, favorable electricity pricing, and grid connection approvals. A macroeconomic downturn in key markets (Europe, US) could lead to deferred projects or reduced capital expenditure by utilities and IPPs (Independent Power Producers).
• Interest Rate Sensitivity: Renewable energy projects are capital-intensive and sensitive to interest rates. If global central banks maintain higher-for-longer interest rate policies, the internal rate of return (IRR) for new projects may compress, dampening demand for Sungrow’s equipment.

2. Geopolitical and Trade Policy Risks

• US Trade Barriers: The US is a high-margin market for Sungrow. Any escalation in trade tensions, such as new tariffs on Chinese-origin components (even those assembled in third countries like Thailand), or stricter enforcement of the Uyghur Forced Labor Prevention Act (UFLPA), could disrupt supply chains and erode margins.
• European Protectionism: The EU is increasingly scrutinizing Chinese renewable energy imports. Potential anti-subsidy investigations or local content requirements could force Sungrow to localize production in Europe, increasing capital expenditure and operational complexity.

3. Execution and Delivery Risks

• Supply Chain Constraints: Rapid scaling to meet the 40-50 GWh storage guidance requires seamless coordination of battery cell sourcing, power electronics, and logistics. Any bottleneck in the supply chain (e.g., lithium price volatility, semiconductor shortages) could delay deliveries and trigger penalty clauses in contracts.
• Project Delays: Large-scale utility projects often face permitting and grid interconnection delays. If customers delay taking delivery, Sungrow may face inventory buildup and working capital pressure.

4. Competitive Intensity

• Margin Pressure: The inverter and storage markets are attracting new entrants and seeing aggressive pricing from existing competitors (e.g., Huawei, Tesla, BYD, Fluence). While Sungrow currently enjoys premium pricing, prolonged price wars could compress gross margins below the current 34-40% range.
• Technological Disruption: The rapid evolution of battery chemistry (e.g., solid-state batteries) and inverter topology requires continuous, heavy R&D investment. Failure to keep pace with technological shifts could erode Sungrow’s leadership position.

5. Foreign Exchange Fluctuations

• Sungrow generates a significant portion of its revenue overseas. Fluctuations in the USD, EUR, and other currencies against the CNY can impact reported earnings. While hedging strategies are in place, extreme volatility can create unpredictable financial outcomes.

Rating / Sector Outlook

Sector Outlook: Structural Growth with Near-Term Consolidation

The global renewable energy sector, particularly solar and storage, is undergoing a phase of structural growth coupled with short-term consolidation.

1. Storage as the New Frontier: The sector narrative is shifting from "Solar Only" to "Solar + Storage." Grid operators worldwide are mandating storage attachments for new renewable projects to ensure stability. This structural shift favors integrated players like Sungrow who can offer both technologies.
2. Market Share Concentration: As technology standards rise and financing becomes more stringent, smaller, less capitalized players are being squeezed out. Market share is consolidating among top-tier manufacturers with proven bankability, strong balance sheets, and global service networks. Sungrow is a primary beneficiary of this consolidation.
3. Policy Support Remains Strong: Despite political rhetoric, the economic case for renewables is undeniable. The US Inflation Reduction Act (IRA), the EU Green Deal, and China’s dual-carbon goals continue to provide substantial tailwinds.

Valuation Context

Sungrow is currently trading at a Forward P/E of ~14x (2025E).

• Historical Comparison: Historically, high-growth renewable leaders have commanded P/E multiples of 20-30x during peak growth phases. The current compression reflects broader market concerns about geopolitical risks and potential growth saturation.
• Peer Comparison: Compared to global peers in the inverter and storage space, Sungrow’s valuation is attractive given its superior growth rate (35%+ net profit growth) and margin profile (34%+ gross margin). Many Western peers trade at higher multiples but with lower growth rates.
• PEG Ratio: With a projected earnings growth rate of ~35% in 2025, the PEG ratio is well below 1.0, suggesting the stock is undervalued relative to its growth potential.

Analyst Consensus & Rating

• Current Rating: BUY (Maintained)
• Price Target Logic: Based on 2025 estimated EPS of CNY 7.18, applying a target P/E multiple of 18-20x (consistent with a premium growth tech/industrial hybrid) would imply a target price range of CNY 129 - CNY 143. Even using a conservative 15x multiple, the implied price is CNY 107.7, offering upside from the current CNY 99.87.
• Recommendation: We recommend accumulating shares on dips, viewing the current valuation as an entry point for long-term exposure to the global energy transition.

Investment View

Core Investment Logic

1. The "Storage Supercycle" is Real, and Sungrow is Leading It
The most compelling argument for Sungrow is the transformation of its revenue mix. In 1H25, storage revenue nearly matched inverter revenue. This is not just a cyclical spike; it is a structural shift. As grids become saturated with variable renewable energy, storage transitions from an optional add-on to a mandatory infrastructure component. Sungrow’s ability to scale storage shipments to 40-50 GWh annually while maintaining ~40% gross margins demonstrates a formidable competitive moat. This moat is built on:
* Bankability: Utilities trust Sungrow’s long-term warranty and service capabilities.
* Integration: Offering both inverter and storage allows for optimized system design and single-point accountability, a key selling point for EPCs and developers.
* Cost Advantage: Scale allows for better procurement terms on battery cells and semiconductors.

2. Technological Moat Protects Margins
In a commodity-like hardware market, Sungrow avoids the race to the bottom through relentless innovation. The launch of the SG465HX and 1+X 2.0 inverters is not merely marketing; it addresses real pain points for customers (efficiency, maintenance, LCOE). By setting the technical standard, Sungrow dictates the pricing framework. Competitors must follow, often at a higher cost base. This technological leadership is the primary reason Sungrow can sustain gross margins above 34% while others struggle to break 25%.

3. Optionality in AIDC Provides Upside Surprise Potential
The market currently values Sungrow primarily as a renewable energy stock. The entry into the AIDC power supply market is largely unpriced. If Sungrow successfully captures even a small fraction of the high-margin AI data center power market, it could re-rate the stock. The synergy is logical: AI data centers need massive, reliable, and efficient power delivery—exactly what Sungrow engineers. This "third growth pole" reduces cyclicality and opens a new TAM valued in the hundreds of billions globally.

4. Financial Quality and Capital Allocation
Sungrow’s financials are clean. The company generates strong operating cash flows, allowing it to fund R&D and capacity expansion without excessive dilution or debt. The projected increase in cash reserves to CNY 28.87 billion in 2025 provides a buffer against macro shocks and enables strategic M&A or share buybacks if needed. The improving ROIC (Return on Invested Capital) trends suggest that management is allocating capital efficiently.

Strategic Implications for Investors

• Long-Term Hold: For institutional portfolios with an ESG or energy transition mandate, Sungrow is a core holding. It offers exposure to both developed markets (US/Europe) and emerging markets (Asia/Middle East), providing geographic diversification within the sector.
• Monitor Policy Signals: Investors should closely monitor US trade policy developments regarding Southeast Asian solar/storage imports. Any negative news here may cause short-term volatility, presenting buying opportunities given the Company’s resilient fundamentals.
• Track Storage Margins: The key metric to watch in upcoming quarters is the gross margin of the ESS segment. If it remains above 35-38%, it confirms pricing power. A significant drop would indicate intensifying competition.
• AIDC Progress: Watch for announcements regarding major AIDC contracts or partnerships. Early wins in this sector will serve as a catalyst for multiple expansion.

Conclusion

Sungrow Power Supply is executing flawlessly in a challenging global environment. The doubling of its storage business, combined with steady inverter growth and expanding margins, underscores its status as a best-in-class operator. The company is not just participating in the energy transition; it is enabling it with superior technology and financial strength.

The current valuation of ~14x 2025E P/E fails to adequately price in the durability of its storage growth and the optionality of its AIDC venture. We believe the market is overly focused on short-term geopolitical noise and underestimating the long-term structural demand for integrated energy solutions.

Therefore, we maintain our BUY rating. We expect Sungrow to deliver compounded annual earnings growth of over 15% through 2027, driven by volume growth in storage, margin resilience in inverters, and emerging contributions from AIDC. For investors seeking exposure to the global decarbonization theme with a company that has proven execution capability and financial discipline, Sungrow represents a compelling opportunity.

Appendix: Detailed Financial Forecasts & Metrics

To support the investment thesis, we provide a detailed breakdown of the financial projections and key ratios as analyzed by Huayan Securities Research Institute.

1. Income Statement Forecast (2024-2027E)

Analysis: The forecast assumes a moderation in revenue growth from the exceptional 1H25 levels to a sustainable 10-17% range. However, net profit growth remains robust due to margin expansion. The projected Gross Margin improvement from 29.9% in 2024 to 31.4% in 2025 reflects the higher mix of high-margin storage sales.

2. Balance Sheet Highlights (2024-2027E)

Analysis: The balance sheet strengthens significantly over the forecast period. The Debt-to-Asset ratio declines from 65.1% to 51.3%, indicating a deleveraging trend driven by strong retained earnings. Cash reserves nearly triple from 2024 to 2027, providing ample liquidity for R&D, capacity expansion, and potential strategic acquisitions in the AIDC or new battery technology sectors.

3. Cash Flow Statement Overview (2024-2027E)

Analysis: Strong operating cash flow generation is a hallmark of Sungrow’s business model. The positive OCF covers all capital expenditures (Investing Cash Flow) with surplus, allowing for debt repayment or dividend distributions. The significant jump in Net Change in Cash in 2025E (CNY 90.7 billion) reflects the anticipated surge in profitability and working capital efficiency.

4. Key Valuation Ratios

Analysis:
* P/E Compression: The forward P/E declines from 13.9x in 2025 to 11.6x in 2027, making the stock increasingly attractive if earnings growth materializes as predicted.
* High ROE/ROIC: Return on Equity remains exceptionally high (>20%), indicating efficient use of shareholder capital. Although ROE moderates slightly due to equity base expansion, it remains best-in-class for the industrial sector.
* EV/EBITDA: An EV/EBITDA of <10x for a company with >15% earnings growth is considered undervalued in global markets, further supporting the Buy rating.

Final Remarks

Sungrow Power Supply stands at the intersection of two megatrends: the global decarbonization of energy systems and the electrification of digital infrastructure (AI). Its 1H25 results prove that it is not just a participant but a leader in these fields. The doubling of storage revenue, sustained high margins, and strategic entry into AIDC provide a clear roadmap for continued outperformance.

While risks related to trade policy and global demand exist, Sungrow’s diversified geographic footprint, technological leadership, and strong balance sheet provide ample mitigation. For institutional investors, the current valuation offers a rare combination of growth, quality, and reasonable price. We reaffirm our BUY rating and encourage investors to view any market-driven weakness as an accumulation opportunity.

Disclaimer: This report is based on the research provided by Huayan Securities Institute dated August 29, 2025. The information contained herein is for informational purposes only and does not constitute investment advice. Investors should conduct their own due diligence and consult with financial advisors before making investment decisions. Past performance is not indicative of future results.