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JOURNEY · DETAIL
Sungrow's Cao Renxian: From University Professor to Renewable Energy Titan, Dominating the 100-Billion-Yuan PV and Energy Storage Hardware Market
Founded: Cao Renxian · Sungrow Power Supply Co., Ltd.
JOURNEY
Key Fields
FIELD STAMPSIndustryEnergy
RegionChina
ScaleGiant
ChannelOther
Origin
In 1997, Cao Renxian was a professor at Hefei University of Technology, researching power electronics and renewable energy generation. At the time, China's PV industry was virtually non-existent; core equipment like inverters relied entirely on imports, with companies like Siemens dominating the market. Believing that renewable energy was a long-term trend and that inverters were a segment where Chinese firms could achieve breakthroughs through technical expertise, he resigned from his teaching position. He founded Sungrow in a modest office in Hefei. Early funding was extremely tight, and the company struggled to even pay salaries, relying on aggressive procurement negotiations and credit to keep operations running.
Milestones
1997
Inception Failure
In 1997, Cao Renxian resigned from Hefei University of Technology to found Sungrow. With the domestic PV market nearly zero, the company initially survived by doing odd jobs like UPS power supply repairs. Facing a lack of orders and severe cash flow shortages, many early partners left. This difficult period lasted nearly six years, sustained solely by his persistence in power electronics technology, spanning from 1997 to 2003.
2003
Product Breakthrough Turning Point
In 2003, Sungrow developed China's first grid-tied PV inverter with independent intellectual property rights, breaking the monopoly of foreign brands like Siemens and SMA. It was first applied in the Shanghai Fengxian PV grid-tied project. This established the inverter business as the company's core focus, allowing it to gain a foothold during the window of domestic substitution.
2008
Scaling and IPO Growth
In 2008, Sungrow's inverters were used in the Beijing Olympics 'Bird's Nest' PV project, boosting brand recognition. In 2009, the national 'Golden Sun' demonstration project triggered a surge in domestic PV installations, leading to a spike in orders. In November 2011, Sungrow listed on the Shenzhen Stock Exchange's ChiNext board, becoming the first domestic new energy power supply stock. The capital raised supported capacity expansion and helped the company join the ranks of global top-tier inverter manufacturers, spanning from 2008 to 2011.
2012
Industry Winter Failure
From 2011 to 2012, the US and Europe launched anti-dumping and anti-subsidy investigations against Chinese PV products, plunging the industry into a winter. Suntech Power went bankrupt, and a brutal price war in inverters ensued. Sungrow's profits plummeted, facing immense pressure. Cao Renxian chose to increase R&D investment and expand into power plant development to survive. This counter-cyclical investment laid the groundwork for future market dominance, spanning from 2012 to 2013.
2015
Global Leadership PMF
In 2015, Sungrow's PV inverter shipments surpassed Germany's SMA to rank first globally, a position it has maintained for years. Starting in 2019, the company increased investment in energy storage, migrating its power electronics expertise to energy storage converters and system integration, creating a dual-engine of PV and storage. In 2020, revenue reached approximately 19.287 billion yuan with a net profit of about 1.954 billion yuan, with a global channel network largely established, spanning from 2015 to 2020.
2021
Storage Boom and Second Startup Growth
In 2024, the company's revenue reached approximately 77.857 billion yuan with a net profit of about 11.036 billion yuan. In 2025, energy storage system shipments surpassed Tesla to rank first globally. Despite performance fluctuations due to the overseas pandemic and chip shortages in 2021, and industry-wide overcapacity and price competition after 2023, Cao Renxian continued to drive the company's transformation from an equipment supplier to a global energy solutions provider. By 2025, market cap neared 300 billion yuan, and the company began planning entry into the AI data center power supply sector, spanning from 2021 to 2025.
Turning Points
- 2003: Developed China's first independent IP grid-tied PV inverter, breaking the Siemens/SMA monopoly and establishing the core business.
- 2011: Listed on the ChiNext board, using capital market financing to secure resources before the industry winter.
- 2012: Increased R&D investment during the anti-dumping winter instead of laying off staff, a decision that paved the way for global leadership.
- 2015: Inverter shipments surpassed SMA to become global No. 1, transitioning from a domestic substitute to a global leader.
- 2019: Bet heavily on energy storage, migrating power electronics capabilities to a new track, leading to 2025 shipments surpassing Tesla.
Failures & Pitfalls
- The first six years were spent without PV orders, relying on odd jobs like UPS power supplies; funds were so tight that salaries were delayed, and early partners left.
- 2011-2012: The US/EU anti-dumping investigations caused an industry winter; brutal price wars led to a sharp decline in profits and near-stagnation.
- 2021: Faced overseas pandemic disruptions and IGBT chip shortages, causing project delays and a significant correction in performance and stock price.
- Post-2023: Industry-wide overcapacity and price wars in PV and storage pressured gross margins, and the Cao family's wealth fluctuated with the stock price.
关键成功要素
- The founder's background as a university power electronics teacher meant technical capability was the primary asset; the R&D gene remains central.
- Targeted segments requiring domestic substitution, starting with markets where imports were the only option, then scaling globally.
- Increased R&D investment during industry downturns to capture market share while competitors retreated.
- Modularized core power electronics capabilities from inverters to apply them to adjacent tracks like energy storage, charging piles, and data center power.
- Established a global direct sales and service network ahead of competitors, creating high barriers to entry for followers.
Lessons
- The biggest trap for tech-founded companies is turning technical advantages into product silos; Sungrow avoided this through channels and scenario-based solutions.
- In cyclical industries, counter-cyclical investment during downturns is more decisive for the five-year outlook than expansion during booms.
- After a single product reaches the top, one must proactively open a second growth curve; Sungrow entered energy storage before the inverter market peaked, avoiding a growth cliff.
- The biggest risk in hot industries is overcapacity; hardware companies must hedge price wars through global markets and system integration capabilities.
- Aligning the company's destiny with a 30-year trend like energy transition is more stable than chasing any single policy subsidy.
Core Data
- 2024 Revenue：77.857 billion yuan (public data, not independently verified)
- 2024 Net Profit：11.036 billion yuan (public data, not independently verified)
- 2020 Revenue：19.287 billion yuan (public data, not independently verified)
- 2020 Net Profit：1.954 billion yuan (public data, not independently verified)
- 2025 Peak Market Cap：Nearly 300 billion yuan (public data, not independently verified)
- Founder Couple's Net Worth：Approx. 52 billion yuan (public data, not independently verified)
- Industry Status：Global leader in both PV inverter and energy storage system shipments (public data, not independently verified)
Competitors / Peers
In the PV inverter sector, competitors include Huawei Digital Power, Ginlong Solis, GoodWe, SMA (Germany), and Enphase (USA). Huawei is the primary rival, with both companies alternating as the top two globally. In the energy storage sector, direct competitors include Tesla Megapack, BYD, CATL, and CRRC Zhuzhou Institute; in 2025, Sungrow surpassed Tesla in shipments. Residential PV inverters face pressure from cost-effective players like Deye. The industry is currently in a cycle of overcapacity and price wars, with competition shifting from unit price to global channels, brand safety, and integrated PV-storage solutions.