On July 8, Huadian Tianjin Haijing's 1,000,000-kilowatt "salt-solar complementary" power station, the world's largest single-capacity "salt-solar complementary" power station, was connected to the grid for power generation. While improving the ability to guarantee power supply in North China, a composite industrial model of photovoltaic power generation, water surface brine production, and underwater aquaculture has been explored.

The biggest difference from other photovoltaic power plants is that the distance between the photovoltaic arrays here is much larger, reaching 14 meters, almost twice that of other photovoltaic power plants. The purpose of this is to minimize the shadowing of the solar panels on the water surface and the impact on the salt production.

The slope of this photovoltaic panel is precisely designed to be 17 degrees, while most other photovoltaic power plants are about 30 to 40 degrees. This is because, judging from the trajectory of the sun throughout the year, the occlusion of the water surface at 17 degrees is the smallest.

Moreover, both sides of the photovoltaic panel here can generate electricity. In addition to directly absorbing sunlight on the upper surface for electrical energy conversion, its back can also absorb sunlight reflected from the water surface. This alone can increase its power generation efficiency by 5%-7 %.

After the project is put into operation, 1.5 billion kilowatt-hours of green electricity will be produced from the 20,000 mu of salt fields every year, which will further promote the transformation of the green energy structure in North China and drive the internal circulation of the regional industrial chain. At the same time, it realizes a new compound industrial model of "salt and light complementarity" of photovoltaic power generation on water, brine production by surface evaporation, and underwater aquaculture.