Equity Research: Sungrow Power Supply (300274.SZ)

Date: September 11, 2025
Rating: BUY-A (Maintained)
Current Price: CNY 135.34 (as of Sep 5, 2025)
Target Valuation Context: 2025E P/E of 21.1x
Analysts: Xiao Suo, Jia Huilin (Shanxi Securities Institute)

Executive Summary

Sungrow Power Supply Co., Ltd. ("Sungrow" or the "Company"), a global leader in solar inverters and energy storage systems (ESS), has released its interim financial results for the first half of 2025 (1H25). The report underscores the Company’s robust operational momentum, characterized by significant top-line expansion and sustained profitability improvements across its core business segments. In 1H25, Sungrow achieved total revenue of CNY 43.53 billion, representing a year-over-year (YoY) increase of 40.3%, while attributable net profit surged to CNY 7.73 billion, up 56.0% YoY. Notably, the second quarter (Q2) alone delivered revenue of CNY 24.50 billion (+33.1% YoY, +28.7% Quarter-over-Quarter [QoQ]) and net profit of CNY 3.91 billion (+36.5% YoY, +2.1% QoQ), demonstrating accelerating growth trajectories and resilient demand despite broader macroeconomic headwinds in certain regions.

The core investment thesis for Sungrow remains anchored in its dual-engine growth strategy comprising Photovoltaic (PV) Inverters and Energy Storage Systems. The PV inverter segment continues to benefit from the Company’s entrenched global market leadership, brand equity, and product innovation, with 1H25 revenue reaching CNY 13.4 billion (+11% YoY) and maintaining a healthy gross margin of 35.74%. Simultaneously, the ESS segment has emerged as a primary growth driver, recording a staggering 128% YoY revenue increase to CNY 17.8 billion in 1H25, with gross margins holding steady at an impressive 39.92%. This performance validates Sungrow’s successful transition from a pure-play inverter manufacturer to a comprehensive clean energy power electronics solutions provider.

Beyond its traditional strongholds, Sungrow is strategically pivoting towards high-growth adjacent markets, specifically Artificial Intelligence Data Centers (AIDC). Leveraging its deep expertise in power supply and power electronics conversion, the Company has established a dedicated AIDC business unit. With R&D expenditure increasing by 37% YoY to CNY 2.037 billion in 1H25 and R&D personnel constituting 40% of the workforce, Sungrow is positioning itself to capture value in the burgeoning AI infrastructure sector, with initial product launches targeted for overseas markets in the coming year.

We maintain our BUY-A rating on Sungrow. Our confidence is underpinned by the Company’s superior competitive positioning, diversified global footprint, and ability to sustain high margins amidst intense industry competition. We project earnings per share (EPS) of CNY 6.49, CNY 7.16, and CNY 7.79 for fiscal years 2025, 2026, and 2027, respectively. Based on the closing price of CNY 135.34 on September 8, 2025, the stock trades at forward P/E multiples of 21.1x, 19.1x, and 17.6x for the respective years. These valuations appear attractive given the Company’s consistent double-digit earnings growth potential and its expanding total addressable market (TAM) into energy storage and AI-related power infrastructure.

Key Takeaways

1. Robust Financial Performance: Accelerating Growth in 1H25

Sungrow’s 1H25 financial results reflect a company operating at peak efficiency, capitalizing on global renewable energy adoption trends. The divergence between revenue growth (40.3%) and net profit growth (56.0%) indicates improved operational leverage and favorable product mix shifts towards higher-margin offerings, particularly in the energy storage domain.

Quarterly Breakdown and Momentum

The sequential acceleration in Q2 is particularly noteworthy. While Q1 often faces seasonal lulls due to weather conditions and holiday impacts in key markets, Q2 demonstrated strong momentum:
* Q2 Revenue: CNY 24.50 billion, marking a 28.7% increase from Q1. This suggests strong order execution and delivery capabilities.
* Q2 Net Profit: CNY 3.91 billion, a 2.1% QoQ increase. The slight deceleration in profit growth relative to revenue in QoQ terms may be attributed to minor fluctuations in operating expenses or foreign exchange impacts, but the absolute profitability remains exceptionally high.

*Note: Aggregate gross margin derived from segment data weighted by revenue share.

The strong cash flow generation supports this growth. Operating cash flow remains healthy, allowing the Company to fund its aggressive R&D initiatives and global expansion without excessive reliance on external debt financing. The balance sheet shows a strengthening liquidity position, with cash and cash equivalents growing significantly, providing a buffer against potential supply chain disruptions or geopolitical volatility.

2. PV Inverters: Sustaining Leadership Through Innovation and Globalization

The PV inverter business, historically Sungrow’s cash cow, continues to demonstrate resilience and moderate growth. In 1H25, this segment generated CNY 13.4 billion in revenue, an 11% YoY increase. While the growth rate is lower than that of the ESS segment, it reflects the maturation of the global solar market and the Company’s focus on quality over quantity in a increasingly competitive landscape.

Product Innovation: Setting New Industry Standards

Sungrow’s ability to maintain its market share is driven by continuous technological breakthroughs. In 1H25, the Company launched two flagship products that reinforce its technical superiority:
1. SG465HX String Inverter: This is the world’s first string inverter with a power output exceeding 400kW. High-power string inverters are critical for utility-scale projects as they reduce the levelized cost of energy (LCOE) by minimizing the number of units required, lowering installation costs, and simplifying maintenance. The SG465HX addresses the industry’s demand for higher power density and efficiency.
2. 1+X2.0 Modular Inverter: As the world’s first split-type modular inverter, this product offers unprecedented flexibility. The modular design allows for easier transportation, installation, and maintenance, particularly in complex terrains or constrained sites. It also enhances system reliability, as individual modules can be replaced without shutting down the entire system.

Global Footprint and Brand Strength

Sungrow’s globalization strategy is a key moat against domestic competition in China. By establishing a localized presence, the Company mitigates trade barrier risks and enhances customer service responsiveness.
* Overseas Capacity: As of June 2025, Sungrow’s overseas PV inverter production capacity reached 50GW. This localized manufacturing capability is crucial for complying with local content requirements in markets such as Europe, India, and potentially the Middle East.
* Sales Network: The Company operates over 20 branches and more than 60 representative offices globally, with products sold in over 100 countries. This extensive network ensures deep market penetration and strong after-sales support, which are critical decision factors for large-scale project developers.
* Margin Profile: The gross margin for the PV inverter segment stood at 35.74% in 1H25, a slight decline of 1.88 percentage points YoY. This minor compression is likely due to increased competition in standard models and potential pricing pressures in certain regions. However, a margin above 35% remains industry-leading, reflecting the premium associated with Sungrow’s brand and high-efficiency products.

3. Energy Storage Systems (ESS): The Primary Growth Engine

The ESS segment has unequivocally become the primary driver of Sungrow’s growth trajectory. In 1H25, ESS revenue soared to CNY 17.8 billion, more than doubling with a 128% YoY increase. This explosive growth mirrors the global surge in demand for grid-scale energy storage, driven by the intermittency of renewable energy sources and the need for grid stability.

Market Dynamics and Competitive Advantage

The global energy storage market is transitioning from early adoption to mainstream deployment. Sungrow is well-positioned to capitalize on this trend due to its integrated approach, offering both battery packs and power conversion systems (PCS). This vertical integration allows for better optimization of system performance, safety, and cost.

• Revenue Scale: At CNY 17.8 billion, the ESS segment now surpasses the PV inverter segment in terms of revenue contribution. This structural shift highlights the Company’s successful diversification and reduces its reliance on the cyclical solar installation market.
• Profitability Resilience: Despite the rapid scale-up, the ESS segment maintained a gross margin of 39.92%, only slightly down by 0.16 percentage points YoY. This stability is remarkable given the intense price competition in the battery supply chain. It suggests that Sungrow commands a pricing premium due to its system integration capabilities, brand reputation for safety, and global service network.

Product Portfolio Expansion

Sungrow continues to innovate in the ESS space, addressing diverse customer needs from utility-scale to commercial and industrial (C&I) applications.
1. PowerTitan 3.0 AC Intelligent Storage Platform: The latest iteration of its flagship utility-scale solution. The "Plus" version boasts a capacity of 12.5MWh, representing a significant increase in energy density. Higher density reduces the footprint and balance-of-system (BOS) costs for project developers, making it highly attractive for land-constrained projects.
2. PowerStack 255CS System: Designed for flexible deployment, this system supports both 2-hour and 4-hour duration schemes. This flexibility is crucial as market regulations evolve to reward longer-duration storage for grid balancing services.
3. Grid-Forming Technology for C&I: Sungrow pioneered customized grid-forming technology for the C&I sector, supporting MW-level park black starts. Grid-forming inverters can stabilize the grid voltage and frequency independently, a critical feature as the penetration of inverter-based resources increases. This technology differentiates Sungrow from competitors who primarily offer grid-following solutions.

4. Strategic Pivot: Comprehensive Layout in AIDC

One of the most significant strategic developments highlighted in the report is Sungrow’s entry into the Artificial Intelligence Data Center (AIDC) power supply market. This move represents a logical extension of the Company’s core competencies in power electronics and thermal management.

Rationale and Synergies

AI data centers require massive amounts of reliable, efficient, and high-density power. The power architecture of an AIDC shares fundamental similarities with renewable energy systems:
* Power Conversion: Both require efficient AC/DC and DC/AC conversion. Sungrow’s expertise in high-efficiency inverters translates directly to high-efficiency power supplies for servers.
* Thermal Management: High-power AI chips generate significant heat. Sungrow’s experience in managing thermal loads in large-scale inverters and storage systems provides a competitive edge in designing liquid cooling and air cooling solutions for data centers.
* Reliability: Data centers demand uptime levels of 99.999% or higher. Sungrow’s track record in delivering mission-critical power infrastructure for utilities builds trust with hyperscalers and data center operators.

Execution Plan

• Dedicated Business Unit: The establishment of a specific AIDC business unit signals a serious commitment to this sector, ensuring focused resource allocation and strategic planning.
• R&D Investment: In 1H25, Sungrow invested CNY 2.037 billion in R&D, a 37% YoY increase. With R&D personnel accounting for 40% of the total workforce, the Company is heavily investing in next-generation technologies. A portion of this investment is directed towards developing power solutions tailored for AI workloads.
• Market Focus: The Company is initially targeting overseas markets, where the demand for AI infrastructure is most acute and where pricing power is stronger. The goal is to launch initial products within the next year (2026). This timeline suggests that while AIDC is not a immediate revenue contributor in 2025, it serves as a crucial long-term growth optionality that could re-rate the stock’s valuation multiple in the future.

5. Financial Health and Operational Efficiency

Sungrow’s balance sheet and cash flow statements reflect a financially robust organization capable of sustaining its growth ambitions.

Balance Sheet Strength

• Asset Quality: Total assets grew to CNY 123.1 billion by mid-2025 (estimated based on trend), driven by increases in current assets, particularly cash and receivables. The growth in receivables is consistent with revenue expansion, but the Company maintains strict credit control measures.
• Liability Management: The debt-to-asset ratio has been managed prudently. Long-term borrowings have increased moderately to fund capacity expansion, but the overall leverage remains within comfortable limits. The current ratio and quick ratio indicate strong short-term liquidity, reducing refinancing risks.
• Equity Base: Retained earnings continue to accumulate, strengthening the shareholder equity base. This internal capital generation reduces the need for equity dilution, protecting existing shareholders’ value.

Cash Flow Dynamics

• Operating Cash Flow: The Company generates substantial operating cash flows, which are reinvested into R&D and capacity expansion. The positive operating cash flow confirms the quality of earnings, as profits are backed by actual cash inflows rather than just accounting accruals.
• Investing Activities: Capital expenditures are aligned with growth plans, focusing on expanding overseas production capacities and R&D facilities. The disciplined approach to capex ensures that returns on invested capital (ROIC) remain high.

Risks / Headwinds

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

1. Geopolitical and Policy Risks

• Trade Barriers: As a global exporter, Sungrow is exposed to trade policies in key markets such as the United States, Europe, and India. Tariffs, anti-dumping duties, or local content requirements could increase costs or restrict market access. For instance, potential changes in the US Inflation Reduction Act (IRA) or EU carbon border adjustment mechanisms could alter the competitive landscape.
• Subsidy Changes: The profitability of renewable energy projects often depends on government subsidies and tax incentives. Any reduction or elimination of these supports in major markets could dampen demand for solar and storage systems.

2. Raw Material Price Volatility

• Component Costs: The cost structure of inverters and ESS is influenced by the prices of semiconductors (IGBTs, MOSFETs), copper, aluminum, and lithium carbonate. While recent trends have seen some stabilization, sudden spikes in raw material prices could compress gross margins if the Company cannot pass these costs onto customers.
• Supply Chain Disruptions: Geopolitical tensions or logistical bottlenecks could disrupt the supply of critical components, leading to production delays and increased costs.

3. Demand Uncertainty

• Macro-economic Slowdown: A global economic slowdown could lead to reduced capital expenditure by utility companies and commercial entities, delaying renewable energy and storage projects.
• Grid Connection Bottlenecks: In many markets, the pace of renewable energy installation is constrained by grid infrastructure limitations. Delays in grid connections can push back revenue recognition for Sungrow.

4. Intensifying Competition

• Price Wars: The solar inverter and ESS markets are becoming increasingly crowded, with new entrants from China and established players from Europe and North America. Aggressive pricing strategies by competitors could erode Sungrow’s market share and margins.
• Technological Disruption: Rapid technological advancements in battery chemistry (e.g., solid-state batteries) or inverter topology could render existing products obsolete if Sungrow fails to keep pace with innovation.

5. Foreign Exchange Fluctuations

• Currency Exposure: With a significant portion of revenue generated overseas, Sungrow is exposed to foreign exchange risks. Fluctuations in the USD, EUR, and other currencies against the CNY can impact reported earnings. While the Company uses hedging instruments, imperfect hedging can lead to volatility in financial results.

Rating / Sector Outlook

Sector Outlook: Renewable Energy & Storage

The global transition towards clean energy remains a secular trend, supported by climate change commitments and energy security concerns.
* Solar PV: The solar market is expected to continue growing, albeit at a moderating pace compared to the explosive growth of the past decade. The focus is shifting from pure capacity addition to grid integration and efficiency improvements.
* Energy Storage: The ESS market is poised for exponential growth as renewables penetrate deeper into the grid. Regulatory frameworks are evolving to value storage services, creating new revenue streams for asset owners and equipment providers.
* AI Infrastructure: The rise of AI is creating a new, high-growth demand segment for power infrastructure. Companies that can provide efficient, reliable, and scalable power solutions for data centers are likely to command premium valuations.

Company Rating: BUY-A (Maintained)

We maintain our BUY-A rating on Sungrow Power Supply. The Company’s strong execution in 1H25, coupled with its strategic positioning in high-growth segments (ESS and AIDC), justifies a premium valuation relative to peers.

Valuation Analysis

• Earnings Forecast: We project EPS of CNY 6.49 for 2025, CNY 7.16 for 2026, and CNY 7.79 for 2027. This implies a compound annual growth rate (CAGR) of approximately 15-20% in earnings per share over the next three years.
• P/E Multiple: At the current price of CNY 135.34, the stock trades at a 2025E P/E of 21.1x. This multiple is reasonable given the Company’s growth profile, market leadership, and diversification into higher-margin businesses. Compared to historical averages and peer groups, Sungrow offers a balanced risk-reward profile.
• PEG Ratio: With a projected earnings growth rate of ~20% and a P/E of ~21x, the PEG ratio is close to 1.0, indicating that the stock is fairly valued relative to its growth potential. However, the optionality provided by the AIDC business and the potential for margin expansion in ESS could drive multiple expansion.

Source: Shanxi Securities Institute Estimates

The downward trend in P/E multiples from 30.1x in 2023 to 17.6x in 2027 reflects the normalization of growth rates as the base becomes larger. However, the absolute earnings power continues to grow, driving shareholder value.

Investment View

Core Investment Logic

1. Dual-Engine Growth Stability: Sungrow has successfully transformed from a single-product company into a diversified clean energy powerhouse. The synergy between PV inverters and ESS provides a stable revenue base while capturing high-growth opportunities. The ESS segment, now larger than the inverter business, offers higher margins and faster growth, de-risking the Company from solar-specific cyclicality.
2. Global Competitive Moat: Sungrow’s global brand, extensive sales network, and localized production capacity create significant barriers to entry for competitors. In an era of increasing geopolitical fragmentation, having a truly global footprint is a strategic advantage that allows the Company to navigate trade barriers and serve customers locally.
3. Technological Leadership: Continuous innovation in high-power inverters, modular storage systems, and grid-forming technologies ensures that Sungrow remains at the forefront of the industry. This technological edge allows the Company to command premium pricing and maintain high margins despite competitive pressures.
4. Optionality in AIDC: The strategic entry into the AIDC power supply market opens up a new, high-value growth avenue. Given the surging demand for AI infrastructure, this move could significantly expand Sungrow’s TAM and re-rate its valuation multiple in the medium to long term. The Company’s expertise in power electronics makes it a natural fit for this market.
5. Financial Robustness: Strong cash flow generation, prudent balance sheet management, and high ROE demonstrate the Company’s ability to sustain growth and return value to shareholders. The financial health provides the flexibility to invest in R&D and capacity expansion without compromising stability.

Strategic Implications for Investors

• Long-Term Hold: Sungrow is a core holding for investors seeking exposure to the global energy transition. The Company’s diversified portfolio and global reach make it less vulnerable to regional downturns.
• Monitor AIDC Progress: Investors should closely monitor the progress of the AIDC business unit. Successful product launches and customer acquisitions in this segment could serve as a catalyst for stock price appreciation.
• Margin Watch: While margins have been resilient, investors should watch for any signs of compression due to raw material costs or competitive pricing. The ability to maintain margins above 30% aggregate is key to sustaining the current valuation.
• Geopolitical Hedging: Sungrow’s global diversification acts as a hedge against regional policy risks. However, investors should remain vigilant about major geopolitical shifts that could impact international trade flows.

Conclusion

Sungrow Power Supply stands out as a best-in-class player in the global renewable energy equipment sector. Its 1H25 performance confirms the strength of its business model and the effectiveness of its strategic initiatives. With a dominant position in PV inverters, a rapidly growing ESS business, and a promising entry into the AIDC market, Sungrow is well-equipped to deliver sustainable long-term growth.

We believe the current valuation offers an attractive entry point for long-term investors. The combination of solid earnings growth, strong cash flows, and strategic optionality in AI infrastructure supports our BUY-A rating. We recommend investors accumulate shares on any weakness, viewing Sungrow as a cornerstone investment in the clean energy and future power infrastructure themes.

Appendix: Detailed Financial Analysis

Income Statement Trends

The income statement reveals a consistent improvement in profitability metrics.
* Revenue Growth: The projected revenue growth of 16.8% in 2025, followed by 13.3% in 2026 and 11.2% in 2027, indicates a sustainable growth trajectory. This moderation from the high double-digit growth of the past is expected as the base expands, but it remains robust compared to global GDP growth.
* Cost of Goods Sold (COGS): COGS is expected to grow in line with revenue, maintaining gross margins in the 30-31% range. This stability is a testament to the Company’s supply chain management and pricing power.
* Operating Expenses: R&D expenses are projected to increase in absolute terms, reflecting the Company’s commitment to innovation. However, as a percentage of revenue, operating expenses are expected to remain controlled, contributing to operating leverage.
* Net Margin: The net margin is projected to stabilize around 14-15%, reflecting a mature and efficient operational model.

Balance Sheet Health

• Working Capital: The management of working capital is efficient, with receivables and inventory turnover ratios remaining healthy. The increase in cash reserves provides a cushion against unforeseen events.
• Debt Structure: The debt structure is balanced, with a mix of short-term and long-term liabilities. The interest coverage ratio is strong, indicating no immediate solvency risks.
• Shareholder Equity: The consistent growth in retained earnings strengthens the equity base, improving the Company’s creditworthiness and financial flexibility.

Cash Flow Sustainability

• Operating Cash Flow: The projected operating cash flows remain positive and robust, supporting self-funded growth.
• Capital Expenditure: Capex is aligned with strategic goals, focusing on high-return projects. The free cash flow generation is sufficient to support dividends and potential share buybacks in the future.

Key Performance Indicators (KPIs) to Monitor

1. ESS Order Backlog: Given the high growth in this segment, the order backlog is a leading indicator of future revenue.
2. Overseas Revenue Share: An increasing share of overseas revenue indicates successful globalization and reduced dependence on the domestic Chinese market.
3. R&D Conversion Rate: The speed at which R&D investments translate into commercially successful products, particularly in the AIDC segment.
4. Gross Margin by Segment: Tracking margins in PV and ESS separately to identify any structural shifts in profitability.

Disclaimer and Analyst Certification

Analyst Certification:
The analysts, Xiao Suo and Jia Huilin, certify that they are registered with the Securities Association of China and have adhered to professional standards of diligence, independence, and objectivity in preparing this report. They take responsibility for the content and views expressed, ensuring that the information sources are legal and compliant, the research methodology is professional and prudent, and the conclusions are based on reasonable evidence. The report accurately reflects their research views. They have not received, nor will they receive, any form of compensation, direct or indirect, for the specific recommendations or views contained in this report. They commit to not using their identity, position, or information obtained during their practice for personal gain or for the benefit of others.

Investment Rating Definition:
The investment ratings are based on the expected price performance of the stock (or industry index) relative to the benchmark index over the 6-12 months following the report's publication.
* Buy (A-Share): Expected outperformance of >15% relative to the CSI 300 Index.
* Outperform: Expected outperformance of 5%-15% relative to the benchmark.
* Neutral: Expected performance within -5% to +5% relative to the benchmark.
* Underperform: Expected underperformance of -5% to -15% relative to the benchmark.
* Sell: Expected underperformance of >15% relative to the benchmark.

Risk Rating:
* A: Expected volatility is less than or equal to the benchmark index.
* B: Expected volatility is greater than the benchmark index.

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