‘China’s first large-scale offshore PV project’ ready for operation

The booster station for what is said to be China’s first large-scale, pile-fixed deep-water offshore photovoltaic (PV) project has been energized for the first time, marking the operational readiness of the project.

The CGN Yantai Zhaoyuan 400 MW floating solar project, located in Laizhou Bay in northern Zhaoyuan City, spans 6,44 square kilometers and comprises 121 PV sub-arrays. 

With an alternating current (AC) side-rated capacity of 400 MW and a direct current (DC) side installation capacity of 539.3274 MW, the project uses Grand Sunergy’s Seapower double-sided, double-glass heterojunction (HJT) solar modules.

According to the company, offshore photovoltaics face unique challenges due to the harsh marine environment, which includes high humidity, salt spray, corrosion, UV radiation, lightning, low temperatures, and biological fouling. 

To meet these demands, Grand Sunergy has developed the Seapower Series HJT modules with 210-millimeter large-size HJT cells, double-layer coated glass, UV-resistant encapsulation film, and a water-sealing butyl rubber edge. 

These features enhance resistance to salt spray, corrosion, UV light, and wind load, making the modules more reliable in tough offshore conditions, said Grand Sunergy.

“Additionally, the edge sealing employs a butyl rubber edge sealing technology, reducing water permeability by 99.9% compared to industry standards. This effectively prevents water vapor from infiltrating the module interior through the double-layer glass, making it highly suitable for hot and humid coastal environments,” said the company.

In a floating solar analysis by Wood Mackenzie, issued in May 2023, China is highlighted as a major player in the global floating solar market, which is projected to grow at a compounded annual growth rate (CAGR) of 15% over the next decade. As floating solar technology gains traction, China is set to maintain a significant share of this expanding market. 

By 2031, China, along with Indonesia and India, is expected to contribute nearly 70% of the global floating photovoltaic (FPV) demand, underscoring its pivotal role in the sector’s growth.