Elevated Solar Mounting Structures: From “Pastoral-PV Complementarity” to “Agri-PV,” Solar Enters the Era of Three-Dimensional Land Use
2023-05-12
Against the backdrop of global energy transition and growing land scarcity, the construction of photovoltaic power plants is undergoing a profound transformation. Conventional ground‑mounted PV systems, while technically mature, often compete with agriculture and animal husbandry for land. Today, a technology known as “elevated ground‑mount solar structures” is rising rapidly around the world. By raising PV modules to heights of 2 meters or even more than 4 meters, this approach not only frees up the land beneath the arrays for dual use, but also demonstrates huge potential in ecologically fragile areas, high‑wind regions, and agricultural zones.
Pastoral‑PV Complementarity on the Plateau: A Win‑Win for Ecology and Energy
On the western Sichuan Plateau in southwest China, a practice that harmonizes clean energy with ecological protection has taken root. In March 2026, a solar power base in the Xiaojinchuan River region was fully connected to the grid. With an average altitude of 3,700 meters, this facility is not only the country’s first integrated hydro‑PV‑storage project, but also a demonstration of ecological friendliness.
The key design feature is that the PV arrays are mounted at a height of 2 meters. This seemingly simple change solves a core challenge of plateau ecological protection. A height of 2 meters allows yaks and sheep to move freely under the panels and graze. This not only preserves existing pastoral activities, but also reduces surface water evaporation thanks to the shade of the panels, promoting restoration of the plateau grassland. This “pastoral‑PV complementarity” model, verified during construction of a 3,800‑meter‑altitude transmission line, proves that elevated structures are a viable path for coordinating clean energy with rural revitalization in complex terrain and harsh high‑altitude environments.
Agri‑PV: Large‑Scale Practice in Europe
In Europe, especially in Mediterranean countries, agri‑PV is becoming a new frontier for energy majors. In November 2025, Germany’s RWE announced that it had secured three new agri‑PV projects in Italy under the country’s NRRP (National Recovery and Resilience Plan) auction, with a total capacity of 30.2 MW.
To avoid interfering with agricultural activities, RWE employs elevated tracking and fixed structures in these projects. Two of the projects are equipped with movable axis‑tracking systems, while the third uses high‑mounted fixed structures. The PV panels are installed high enough to allow sheep grazing or crop cultivation underneath. Katja Wünschel, CEO of RWE Renewables Europe & Australia, noted, “Italy is a pioneer in the field of agri‑photovoltaics, because land is a scarce resource that must be used responsibly and efficiently.” In addition to generating clean electricity, the elevated panels also protect the crops below against extreme weather such as hail, frost, and drought.
Technical Details: Addressing Wind Loads and Higher Costs
While elevated structures improve land‑use efficiency, they also impose stricter structural requirements. As mounting height increases, wind loads rise exponentially, posing serious challenges to pile depth and structural design.
Udo Geisel, Head of the Solar Division at Germany’s Wagner Solar, pointed out that systems higher than 2.1 meters are generally classified as agri‑PV. Because of the greater wind loads, structural costs for such systems are roughly 10% to 20% higher than for conventional ground‑mounted plants. In response, manufacturers are continually optimizing designs. Wagner Solar, for example, has introduced photovoltaic fence systems with window‑like gaps between modules to reduce the area exposed to wind, thereby lowering structural strength requirements while cutting material use and installation costs.
In regions prone to extreme weather, the wind resistance of elevated structures is especially critical. In hurricane‑prone Florida and the mountainous terrain of Puerto Rico, specially designed elevated mounts have passed rigorous testing. At a coffee farm in Adjuntas, Puerto Rico, MT Solar designed a top‑mount pole structure that elevates panels 15 feet (about 4.6 meters) above the ground to leave space for coffee trees. The system must withstand both high‑altitude winds and hurricane‑force gusts.
From Highways to Industrial Buildings: Diversified Exploration of Elevated Structures
Beyond farmland and pastures, the concept of elevated mounting is extending to transport infrastructure and industrial buildings. In China’s Shanxi province, expressways are being turned into “solar corridors.” Shanxi Construction Investment Group’s Sixth Group is constructing distributed PV projects on unused spaces around expressway ramps, service areas, and interchanges. The project team adopted differentiated designs for various scenarios: in service areas, single‑column cantilever structures were used to build “charging umbrella” carports that combine aesthetics with practicality; in interchange zones, arrays were scientifically arranged to create sizable generation units.
A similar innovation is emerging in Singapore. Facing acute land scarcity, JTC Corporation launched a pilot project in late 2025 to install overhang solar PV systems in the voids above existing industrial buildings. The project makes use of the open space between four‑story industrial blocks, constructing cantilever structures anchored to the main buildings, with PV modules cantilevered in the air – thereby utilizing previously untapped vertical space. If successful, this trial could open up new possibilities for PV installation in densely built cities.
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