Renewables

China completes grid connection of world’s largest open sea PV plant

China commissions world largest open sea PV plant

Photo: CHN Energy

Published

December 31, 2025

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Published:

December 31, 2025

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CHN Energy declared a 1 GW solar power system that it built off the coast of China’s Shandong province, on the open sea, fully connected to the grid. The facility consists of steel truss platforms on bottom-fixed piles. Just in the past month, the state-owned company commissioned solar power plants of 600 MW and 425 MW, a coal power station of 4 GW and China’s largest gas power unit.

China continues to dominate the energy realm with the world’s largest projects and innovative design. The latest example, on the open sea, is eight kilometers from Kenli district in the city of Dongying in the country’s east. It is a giant solar power plant, but not a floating one.

The Shandong Dongying Kenli (Guohua HG14) facility is on steel truss platforms on bottom-fixed piles. China Energy Investment Corp., also known as CHN Energy, declared the photovoltaic system fully connected to the grid. The initial project of the state-owned enterprise was for 1 GW.

China State Construction Engineering Corp. (CSCEC) so far installed 930 platforms out of 2,934 planned. Each is on four piles, at water depth of one to four meters.

The project on the open sea off Shandong province spans 1,223 hectares. Its developer is CHN Energy’s subsidiary Guohua Energy Investment Co.

Project involves 100 MW in battery storage

According to the latest reports, Guohua HG14 consists of bifacial double-glass modules of 710 W and the annual output, when the facility is completed, is estimated at 1.78 TWh. In earlier updates, 2.37 million monocrystalline solar panels of 550 W each were planned, translating to 1.3 GW in peak capacity. Total investment was valued at CNY 8.1 billion (USD 1.16 billion).

The company reportedly switched to stronger, bifacial solar modules for the project offshore Dongying

The offshore solar power plant on the open sea is connected to the mainland grid with a 66 kV cable. Its first segment came online in November 2024. The project involves a battery energy storage system of 100 MW in capability and 200 MWh in capacity.

Giant solar plant comes online at altitude of 3,000 meters

Just in the past month, CHN Energy commissioned several landmark facilities. A new 600 MW solar power plant is in the Xinjiang province in the west, in Qitai county, near the border with Mongolia.

The company completed another PV system, of 425 MW, via Qinghai Gonghe Co. Part of a 1 GW project with storage, called Guoneng Canadian Solar Hainan, it is located in Gonghe county in Qinghai Province. It is at an altitude of 3,000 meters and above.

Just last week, CHN Energy put into operation the fourth and last 1 GW unit of its coal-fired Guangxi Beihai Power Plant. The complex in Guangxi province in southern China includes a 27.3 MW solar power plant for electric car chargers.

The utility has also launched regular production of the first of two units in its gas power plant Anji in Zhejiang province. It is the largest and most efficient in the country, CHN Energy pointed out. When the second unit comes online in early 2026, the power plant will have 1.69 GW in capacity.

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