String inverter

📑 目录

String Inverter: A Comprehensive Global Market Guide for 2026

1. Introduction to String Inverters

A string inverter is a type of solar inverter that connects a series of solar panels (a “string”) to convert the direct current (DC) electricity generated by the panels into alternating current (AC) electricity for use in homes, businesses, or the grid. Unlike microinverters, which are attached to each panel, a string inverter is a centralized unit that manages the output of an entire string. This technology is widely adopted for its cost-effectiveness, reliability, and ease of maintenance, making it a cornerstone of modern photovoltaic (PV) systems. As the global solar market expands, string inverters remain a dominant choice for residential, commercial, and utility-scale installations.

2. Global String Inverter Suppliers and Factory Ranking (Top 10)

The global string inverter market is highly competitive, with key players from Europe, China, and the United States. The following ranking is based on 2025 shipment data, revenue, and market share from industry reports (e.g., Wood Mackenzie, IHS Markit).

等级 公司名称 国家 2025 Market Share (%) Key Product Series
1 Huawei Technologies 中国 18.5 SUN2000 Series
2 Sungrow Power Supply 中国 15.2 SG Series
3 SMA Solar Technology 德国 12.1 Sunny Tripower
4 Fronius International 奥地利 8.9 Symo, SnapINverter
5 ABB (Fimer) Switzerland/Italy 7.4 PVS-100/120
6 Ginlong Technologies (Solis) 中国 6.8 Solis Series
7 Delta Electronics 台湾 5.5 M70A, RPI Series
8 GoodWe Technologies 中国 4.9 DNS, SMT Series
9 Chint Power Systems 中国 3.7 CPS Series
10 SolarEdge Technologies 以色列 3.2 SE Series (with optimizers)

3. Top 10 String Inverter Suppliers and Factories in China

China dominates the global string inverter supply chain. The following list highlights the top Chinese manufacturers based on production capacity, export volume, and quality certifications.

  1. Huawei Technologies – Shenzhen, Guangdong
  2. Sungrow Power Supply – Hefei, Anhui
  3. Ginlong Technologies (Solis) – Ningbo, Zhejiang
  4. GoodWe Technologies – Suzhou, Jiangsu
  5. Chint Power Systems – Hangzhou, Zhejiang
  6. Growatt New Energy – Shenzhen, Guangdong
  7. Kehua Hengsheng – Xiamen, Fujian
  8. JFY Tech – Shenzhen, Guangdong
  9. Deye Inverter Technology – Ningbo, Zhejiang
  10. Sineng Electric – Wuxi, Jiangsu

4. Global Supplier Contact Information Table

公司名称 总部 联系电子邮件 网站
Huawei Technologies Shenzhen, China solar.support@huawei.com https://solar.huawei.com
Sungrow Power Supply Hefei, China info@sungrowpower.com https://www.sungrowpower.com
SMA Solar Technology Niestetal, Germany info@sma.de https://www.sma.de
Fronius International Pettenbach, Austria info@fronius.com https://www.fronius.com
ABB (Fimer) Zurich, Switzerland info@fimer.com https://www.fimer.com
Ginlong Technologies (Solis) Ningbo, China sales@solisinverters.com https://www.ginlong.com
Delta Electronics Taipei, Taiwan solar@deltaww.com https://www.deltaww.com
GoodWe Technologies Suzhou, China info@goodwe.com https://www.goodwe.com
Chint Power Systems 中国杭州 cps@chint.com https://www.chintpowersystems.com
SolarEdge Technologies Herzliya, Israel info@solaredge.com https://www.solaredge.com

5.选择中国制造商时应考虑的因素

Selecting a reliable Chinese string inverter manufacturer requires careful evaluation of several critical factors:

  • 认证： Ensure products have international certifications such as IEC 62109, IEC 61727, CE, TÜV, UL, and CEC (for Australian market).
  • 生产能力： Verify annual output (e.g., 5 GW or more) and factory audits.
  • 研发投资： Look for companies with dedicated R&D teams and patents in MPPT technology and efficiency optimization.
  • Warranty and After-Sales: Standard warranties range from 5 to 10 years. Extended warranties and local service centers are a plus.
  • 供应链的稳定性： Check for access to quality components like IGBTs from Infineon or SiC modules.
  • Compliance with Export Regulations: Ensure the manufacturer can handle export documentation and customs clearance.

6.为什么要向中国制造商购买？主要优势

Chinese string inverter manufacturers offer distinct benefits for global buyers:

  • 成本效益： Chinese inverters are typically 20-40% cheaper than European or American counterparts due to lower labor costs and economies of scale.
  • High Production Volume: China produces over 70% of the world’s solar inverters, ensuring fast lead times and bulk availability.
  • Technological Parity: Leading brands like Huawei and Sungrow now offer efficiency rates exceeding 98.5%, matching or beating premium brands.
  • 定制： Many factories offer OEM/ODM services, allowing for branding and specific voltage/frequency configurations.
  • Government Support: The Chinese government provides subsidies and tax incentives for solar exports, reducing overall costs.

7. Introduction to Key Chinese Factories

Huawei Technologies (Shenzhen)

Huawei’s digital power division produces the SUN2000 series, known for AI-powered MPPT and smart I-V curve diagnostics. Their factory in Dongguan has an annual capacity of 30 GW.

Sungrow Power Supply (Hefei)

Sungrow is the world’s second-largest inverter manufacturer. Their Hefei factory spans 200,000 sqm, producing SG series inverters with 5-10 year warranties. They have a strong presence in utility-scale projects.

Ginlong Technologies (Solis) (Ningbo)

Ginlong focuses on residential and commercial string inverters. Their Ningbo facility produces 8 GW annually, with products certified for 50+ countries.

GoodWe Technologies (Suzhou)

GoodWe is a top 3 residential inverter brand globally. Their factory in Suzhou uses automated SMT lines and has a 10 GW capacity, emphasizing reliability in harsh weather.

8. How to Find Professional Wholesalers in China?

To source string inverters from professional Chinese wholesalers, follow these steps:

  • 使用 B2B 平台： Search on Alibaba, Made-in-China, or Global Sources for verified suppliers with trade assurance.
  • Attend Trade Fairs: Visit SNEC (Shanghai) or Canton Fair (Guangzhou) to meet manufacturers directly.
  • Leverage Industry Associations: Contact the China Photovoltaic Industry Association (CPIA) for member directories.
  • Request Factory Audits: Hire third-party inspection agencies like SGS or TÜV Rheinland to verify production capabilities.
  • Check Export Records: Use customs data platforms (e.g., ImportGenius, Panjiva) to see which companies export to your region.

9.应用场景和解决方案

Residential Rooftop Systems

String inverters are ideal for homes with uniform sun exposure. Solution: Use a 3-6 kW inverter with dual MPPT for east-west roof orientations.

Commercial and Industrial (C&I) Buildings

For factories or warehouses, string inverters with 10-50 kW capacity and remote monitoring reduce operational costs. Solution: Pair with optimizers for partial shading.

Utility-Scale Solar Farms

Large projects require central inverters or multiple string inverters. Solution: Use 1500V DC string inverters from Sungrow or Huawei for lower wiring costs.

Off-Grid and Hybrid Systems

For remote areas, hybrid string inverters with battery storage support (e.g., GoodWe’s ET series) provide energy independence.

10.常见问题（10 个问题）

  1. Q: What is the lifespan of a string inverter? A: Typically 10-15 years, but premium models can last 20 years with proper maintenance.
  2. Q: Can string inverters work with batteries? A: Yes, hybrid string inverters are designed for AC or DC coupling with lithium-ion batteries.
  3. Q: What is the maximum DC input voltage? A: Most modern string inverters support up to 600V (residential) or 1500V (utility).
  4. Q: How do I size a string inverter? A: The inverter’s DC input should be 1.1 to 1.3 times the panel array’s STC rating.
  5. Q: Are Chinese string inverters reliable? A: Yes, top brands meet international standards and have failure rates below 1%.
  6. Q: What is the efficiency of a string inverter? A: European efficiency (EU) ranges from 96% to 98.5% for premium models.
  7. Q: Do I need a string inverter for a small system? A: Yes, for systems under 10 kW, string inverters are cost-effective and simple.
  8. Q: How do I install a string inverter? A: Mount it indoors or outdoors (IP65 rated), connect DC from panels and AC to the grid.
  9. Q: What causes string inverter failure? A: Common causes include capacitor aging, fan dust, and grid surges.
  10. Q: Can I monitor my string inverter remotely? A: Most modern units include Wi-Fi or 4G for real-time monitoring via apps.

11.采购考虑因素

When purchasing string inverters, pay attention to:

  • Shipping Terms: Use FOB (Free on Board) or CIF (Cost, Insurance, Freight) to clarify liability.
  • Payment Methods: Prefer T/T with 30% deposit and 70% against B/L, or use L/C for large orders.
  • 样品测试： Always order samples for testing before bulk production.
  • 知识产权： Ensure the manufacturer does not infringe on patents (e.g., SolarEdge’s power optimizer patents).
  • Spare Parts: Confirm availability of spare parts like fans, capacitors, and communication boards.

12.推荐书籍

  • “Solar Photovoltaic Systems: A Practical Guide for Installers” by John R. Balfour
  • “The Solar Electricity Handbook” by Michael Boxwell
  • “Photovoltaic Design and Installation For Dummies” by Ryan Mayfield
  • “Power Electronics for Renewable Energy Systems” by S. K. Mazumder
  • “String Inverters: Technology, Applications, and Markets” (Industry report from IHS Markit)

13. Product Pricing (Estimated 2026)

Prices vary by power rating and brand. Below are approximate FOB prices from Chinese factories:

Power Rating Price Range (USD/unit) Typical Brand
3 kW (Single Phase) $200 – $350 GoodWe, Solis
5 kW (Single Phase) $300 – $500 Growatt, Deye
10 kW (Three Phase) $600 – $1,000 Sungrow, Huawei
50 kW (Three Phase) $2,500 – $4,000 Sungrow, Chint
100 kW (Utility) $5,000 – $8,000 Huawei, Sineng

14.行业标准

String inverters must comply with key international standards:

  • IEC 62109-1/2: Safety of power converters for use in photovoltaic power systems.
  • IEC 61727: Photovoltaic (PV) systems – Characteristics of the utility interface.
  • IEC 61683: Efficiency measurement for PV inverters.
  • EN 50530: Overall efficiency of grid-connected photovoltaic inverters.
  • UL 1741: Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (USA).
  • VDE-AR-N 4105: German standard for low-voltage grid connection.

15. Global Import and Export Regions (Top 5)

Top 5 Exporting Countries (2025 Data)

  1. China (68% of global exports)
  2. Germany (8%)
  3. United States (5%)
  4. Japan (4%)
  5. South Korea (3%)

5 大进口地区

  1. Europe (Germany, Netherlands, Spain) – 35%
  2. Asia-Pacific (India, Australia, Japan) – 25%
  3. North America (USA, Canada) – 20%
  4. Middle East & Africa (Saudi Arabia, UAE, South Africa) – 12%
  5. Latin America (Brazil, Chile, Mexico) – 8%

16. Google Search Commercial Keywords: 10 FAQ Questions and Answers

  1. Q: Best string inverter for home use 2026? A: GoodWe DNS series or Huawei SUN2000-5KTL are top-rated for homes.
  2. Q: String inverter vs microinverter which is better? A: String inverters are cheaper and simpler; microinverters are better for shaded roofs.
  3. Q: How much does a string inverter cost for a 10kW system? A: Between $600 and $1,000 for the inverter alone.
  4. Q: String inverter price in USA? A: $0.10-$0.20 per watt, plus installation.
  5. Q: String inverter warranty 10 years? A: Yes, many brands offer standard 5-10 year warranties, extendable to 20 years.
  6. Q: Best string inverter brand in China? A: Sungrow and Huawei are the most reliable for commercial use.
  7. Q: String inverter efficiency comparison 2026? A: Huawei (98.5%), Sungrow (98.3%), SMA (98.0%).
  8. Q: Where to buy string inverters wholesale? A: Alibaba, Global Sources, or direct from factory websites.
  9. Q: String inverter for 3 phase power? A: Yes, models like Sungrow SG30KU are designed for 3-phase grids.
  10. Q: String inverter with battery storage? A: Hybrid models like GoodWe ET series support DC-coupled batteries.

17.海关数据和关税税率

Customs data for string inverters (HS Code: 85044030 – Static converters) shows that in 2025, the average import tariff for Chinese inverters into the EU is 0% (under trade agreements), while the USA imposes a 25% tariff under Section 301. Key shipping ports: Shenzhen (China), Rotterdam (Netherlands), and Los Angeles (USA).

Destination Country 费率（%） Duty Type 说明
美国 25 Section 301 May be reduced if inverter is assembled in SE Asia
欧洲联盟 0 GSP/Free Trade No tariff for Chinese origin
印度 15 Basic Customs Duty Plus 18% GST
巴西 12 Import Tax Plus state taxes
澳大利亚 0 ChAFTA Free trade agreement

18.为什么选择中小型工厂

While large factories like Huawei offer scale, small and medium-sized factories (SMEs) provide unique advantages:

  • 灵活性： SMEs accept smaller MOQs (100-500 units) and offer faster customization.
  • 个性化服务： Direct communication with engineers and management.
  • Cost: Lower overheads can lead to 5-10% price reductions compared to giants.
  • Niche Expertise: Some SMEs specialize in off-grid or hybrid inverters for specific regions.
  • 更快的迭代： Quicker product updates based on customer feedback.

19. News Summary – April 2026 (Compiled from Major Media)

  • Source: PV Magazine (April 3, 2026) – “Sungrow launches new 300kW string inverter for utility-scale projects, claiming 99% efficiency.”
  • Source: Reuters (April 8, 2026) – “Huawei Digital Power signs $2B deal to supply string inverters for Saudi Arabia’s NEOM green hydrogen project.”
  • Source: Bloomberg NEF (April 12, 2026) – “Global string inverter prices drop 8% year-over-year due to silicon carbide (SiC) adoption.”
  • Source: Solar Power World (April 18, 2026) – “GoodWe enters US residential market with new UL-certified string inverter series.”
  • Source: China Daily (April 22, 2026) – “China’s string inverter exports rise 15% in Q1 2026, driven by European demand.”

20.2026 年市场核心数据概览

公制 价值 资料来源
Global String Inverter Market Size (2026) $12.5 Billion 大观园研究中心
Annual Growth Rate (CAGR 2024-2030) 7.8% Allied Market Research
Average Selling Price (per watt) $0.08 – $0.15 Industry Survey
Top Application Segment Utility-scale (45%) Wood Mackenzie
Leading Technology Trend 1500V DC + SiC MOSFETs IHS Markit
Average Warranty Period 8.5 years Manufacturer Data

21.客户和市场痛点

Key challenges faced by buyers and users of string inverters include:

  • Reliability Concerns: Some low-cost Chinese inverters have higher failure rates in extreme heat or humidity.
  • Grid Compliance: Inverters must meet evolving grid codes (e.g., VDE 4105 in Germany, UL 1741 in USA).
  • Communication Issues: Compatibility with monitoring platforms (e.g., Modbus, SunSpec) can be inconsistent.
  • Warranty Claims: Slow response times for warranty replacements from overseas factories.
  • Supply Chain Delays: Component shortages (e.g., IGBTs) can lead to lead times of 8-12 weeks.
  • 技术支持： Lack of local engineering support in remote markets.

To address these, buyers should prioritize manufacturers with local warehouses, certified testing, and responsive customer service teams.