China just connected its largest single-capacity solar farm built on a former coal mining area, which is in the Gobi Desert, to the grid.

The Mengxi Blue Ocean Photovoltaic Power Station, located in Otog Front Banner, Ordos, Inner Mongolia, came online on November 5. With a massive installed capacity of 3 gigawatts (GW) and over 5.9 million solar panels, the plant will generate around 5.7 billion kilowatt-hours of electricity annually – enough to power 2 million households.

This huge project will save about 1.71 million tons of standard coal each year and cut carbon dioxide emissions by roughly 4.7 million tons, which is equivalent to planting 62,700 hectares (around 155,000 acres) of trees.

Built on coal mining subsidence land, Mengxi Blue Ocean is part of China’s national West-East Electricity Transfer Project, which brings investment and development to western China west while supplying the growing need for electricity in the eastern provinces.

The solar farm includes the country’s first large-scale outdoor solar testing base in the Gobi Desert climate, demonstrating the potential for large solar installations in challenging environments.

The power station makes use of new rare earth alloy grounding materials, cutting costs by 40%. It also replaces traditional concrete foundations with steel to minimize impact on the local grassland ecosystem.

Chuang Xihong, deputy director of the Engineering Construction Department of Guodian Power Group, CHN Energy’s parent company, explained that Mengxi Blue Ocean is an agrivoltaic project as well [via PV Tech]:

Fine forage and sand-fixing plants are planted under the PV modules, providing grazing for Australian White Sheep and chickens. A composite ecological development model will be established where PV power generation and breeding will go hand in hand.

Read more: China powers up the world’s largest open-sea offshore solar farm

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