Hot-Dip Galvanized Solar Racking: Cornerstone of Durable PV Infrastructure in 2023-Topfence-Construction of solar photovoltaic ground power stations

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Hot-Dip Galvanized Solar Racking: Cornerstone of Durable PV Infrastructure in 2023

2023-04-20

2023 marked a pivotal year for hot-dip galvanized (HDG) steel solar racking, solidifying its position as the material of choice for utility-scale photovoltaic (PV) projects worldwide. Driven by the global surge in solar installations, unprecedented demand for corrosion-resistant, long-lasting structural solutions, and major project awards, HDG solar racking demonstrated unparalleled reliability and market dominance.

Global Project Wins & Major Supply Contracts

The year was highlighted by several landmark contracts that underscored the industry's reliance on hot-dip galvanized steel structures.

In Spain, a monumental 1.1 GW deal was secured in December 2023 by Gonvarri Solar Steel. The company was contracted to supply its TracSmarT+ trackers and RackSmarT fixed structures to utility Naturgy Energy Group. This massive order, consisting of 760 MW of single/dual-row trackers and 358 MW of fixed tilt structures, was deployed across multiple provinces including Jaen, Seville, and Toledo. All primary structural components featured thick hot-dip galvanized coatings, engineered to withstand the harsh, variable climate of the Iberian Peninsula

In Azerbaijan, Arctech supplied its SkyLine II solar tracking system for the country's largest solar farm (312 MW) near Baku. Given the project's proximity to the Caspian Sea coast, the structures required a high C3/C4 anti-corrosion grade. The H-shaped steel pillars and torque tubes were treated with hot-dip galvanization, ensuring a 25-year service life in the high-salt, humid environment.

China, the world's largest PV market, saw fierce competition for large-scale HDG racking contracts:

January 2023: Weisheng Technology, Guoqiang Xingsheng, and Huolan Electric won major bids to supply all-hot-dip-galvanized fixed and tracking 支架 for State Energy Group's Qinghai projects.
August 2023: Sichuan Zhongtian Shenglian New Energy secured a significant order for hot-dip galvanized and Zn-Al-Mg coated racking from PowerChina.
September 2023: Trina Solar and Huolan Electric won the second batch of bids for State Energy Group's Qinghai projects, supplying Q355B hot-dip galvanized fixed and single-axis tracking 支架.
December 2023: Jiangsu Will Hardware won a 509 MW contract for the Datang Shichengzi 1 GW Solar-Thermal + PV Hybrid Project, supplying 23,775 tons of Q235B/Q355B/Q420B hot-dip galvanized fixed adjustable racking.

International Project Applications: Adapting to Extreme Environments

Hot-dip galvanized steel proved indispensable for projects in the world's harshest climates.

In Japan (September 2023), Mibet Energy commissioned a 20 MW solar farm in Miyagi Prefecture. The region's maritime climate and heavy snowfall demanded superior corrosion resistance. Mibet's PGT8 ground-mount system utilized carbon steel with a full hot-dip galvanized finish, providing robust stability and longevity.

In Bahrain (August 2023), Mibet completed a 1.8 MW solar carport project. Facing a tropical desert climate with high temperatures, strong winds, and coastal salt spray, the single-column carport structure was fabricated from thick, hot-dip galvanized carbon steel, offering exceptional heat resistance and anti-corrosion properties.

Material & Technological Advancements in 2023

The industry saw significant advancements in HDG steel quality and application.

High-Strength, Low-Temperature Steel: In December 2023, HBIS Group developed a high-strength vanadium-containing galvanized steel (S350GD-DW) specifically for PV racking. This custom material boasts a yield strength >350 MPa and passes -40°C low-temperature impact tests, making it ideal for extreme cold regions. The entire batch was exported to Russia for solar 支架 manufacturing.

Superior Coating Standards: Leading manufacturers maintained strict quality control. For example, Antaisolar specified an average hot-dip galvanized coating thickness of 85μm for its steel components in a 6 MW rooftop project, far exceeding standard requirements and ensuring decades of rust protection.

Market Trend: Coexistence with Alternatives: While aluminum dominated rooftop installations, hot-dip galvanized steel retained over 90% market share for utility-scale ground-mounted systems in 2023. Its unbeatable combination of high structural strength, cost-effectiveness, and proven long-term corrosion resistance solidified its leadership for large, wind- and snow-loaded projects.

Market Growth & Economic Impact

The global solar racking market experienced explosive growth in 2023, with HDG steel at its core.

Global Utility-Scale Solar: Over 160 GW of new solar capacity was installed, with ground-mounted systems (67%) predominantly using HDG steel.
China's Market: The domestic solar 支架 market exceeded 18 billion yuan ($2.5 billion).
Global HDG Steel Market: Valued at approximately $72.5 billion in 2023, with solar energy as a major growth driver.

Conclusion: The Indispensable Foundation

2023 conclusively affirmed hot-dip galvanized steel solar racking as the irreplaceable foundation of the global solar energy infrastructure. From the high plains of Qinghai to the coasts of Azerbaijan, and the deserts of Bahrain to the snowfields of Japan, HDG racking delivered unmatched durability, strength, and value. As the world accelerates its transition to renewable energy, hot-dip galvanized solar racking will continue to be the first choice for engineers, developers, and investors seeking to build resilient, bankable, and long-lasting solar power plants.

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