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The double-layer suspended wire flexible photovoltaic (PV) mounting system employs an upper and lower cable truss structure, forming a load-bearing and stabilizing double-layer cable net through prestressed steel strands. This allows for a larger span (typically 30–40 meters) and higher clearance (usually below 8 meters). Compared to conventional fixed mounting structure, the foundation usage may be reduced, making it suitable for PV projects requiring reduced ground disturbance or improved land utilization. Primarily designed for wastewater treatment plants, agricultural-photovoltaic integration, and fishery-photovoltaic integration, it is adaptable to various terrains including mountains, hills, plains, deserts, and coastal areas.
Product Description
From a technical perspective, the double-layer cable flexible mounting system forms a stable spatial force-bearing system through the struts or cables between the upper and lower layers of cables, enabling the solar module to achieve good wind resistance stiffness and deformation coordination.
The upper layer of cables mainly bears the vertical load, while the lower layer of cables provides strengthening and stabilization, jointly limiting the displacement amplitude under dynamic loads such as wind and snow. This structure requires high precision in construction tensioning and anchoring, but after completion, it can provide a relatively regular component installation plane. The components can be arranged horizontally or vertically, with the fixing angle generally not exceeding 20°, and can be customized within a limited range according to project requirements.
Product Components
Advantage
▶ Relatively Less Foundation Required:
Due to the large span, for the same capacity, the number of foundations may be significantly reduced, compared to fixed type mounting structure.
▶ Large Span and High Clearance:
Provides ample space for agricultural planting, aquaculture, human activities or equipment passage below.
▶ Strong Terrain Adaptability:
Adaptable to mountains, hills, plains, deserts, and coastal areas.
▶ Excellent Wind Resistance:
The double-layer cable structure helps improve overall rigidity; the system is equipped with north-south stabilizing truss and wind-resistant cables, further enhancing stability.
▶ Diverse Corrosion Protection Options:
Hot-dip galvanized, zinc-aluminum-magnesium, and steel strands with different zinc layer weights can be selected according to the environmental corrosion level.
▶ Adaptability to Difficult Terrain :
Initial investment may be higher than conventional mounting structure, but this solution adapt to those site that difficult to construct, e.g. water treatment factory, undulate mountain, mud flat or intertidal zone.
Parameters
| Base Type | PHC/Cast-in-place Pile |
| Module Array | Landscape/Portrait |
| Module Fixation | Bolts/Clamps |
| Angle | ≤20°(customizable) |
| Environment Temperature | -20°C-60°C |
| Material | Q235B/Q355B/Q420/etc. |
| Steel Strand | High strength low relaxation prestressed galvanized steel strand |
| Anchorage Device | Squeeze anchor/Clip anchor (with locking device) |
| Coating |
Fastener galvanized >45 μm; Structure galvanized >65 μm; Zinc aluminum magnesium double-sided weight >275g/m; Weight of zinc layer per unit area of steel strand: 190g/m~350g/m. |
Applicable Scenarios
▪ Wastewater treatment plant (utilizes the space above and places no column in water)
▪ Agricultural-solar hybrid (high headroom and large span, facilitating machinery access and natural lighting)
▪ Aquaculture-solar hybrid (minimizes water area coverage, leaving space for aquaculture)
▪ Mountainous / hilly areas (parallel to terrain, reducing excavation)
▪ Plains / deserts / coastal areas (corrosion protection and wind resistance solutions can be matched and selected)
Important Notes:
▶ High construction precision requirements:
Tensioning and anchoring must be performed according to the design prestress value. It is recommended that this be done by personnel experienced in flexible scaffolding.
▶ Consider component stress consistency for large spans:
Assess the impact of cable deformation on the frame; add intermediate supports or adjust the tensioning scheme if necessary.
▶ Limited angle customization:
Fixed angles are generally ≤15°; angles exceeding this require separate evaluation.
Selection Recommendations (Single-Layer vs. Double-Layer)
▪ Single-Layer Flexible Structure: Suitable for projects with short span requirements and light wind loads.
▪ Double-Layer Flexible Structure: More suitable for projects with higher requirements for stability, wind resistance, and utilization of the underlying space.
Summary
Double-layer suspended wire flexible photovoltaic (PV) mounting system offers a viable solution for reducing foundation requirements while achieving larger spans and higher clearances. Their double-layer structure contributes to wind resistance stiffness and deformation control, but also imposes more detailed requirements on design, installation, and operation and maintenance.
The product is suitable for diverse terrains, exhibiting particularly distinctive structural features in mixed-use projects involving land or water. Users should conduct a comprehensive assessment considering specific terrain, span, clearance, corrosion resistance requirements, and construction capabilities, avoiding the direct application of conventional support systems.
Solar First Project Reference
Single-layer suspended wire flexible photovoltaic (PV) mounting solutions are PV module mounting systems that use prestressed steel strands as the main load-bearing components. Unlike traditional steel mounting structure, they utilize a steel strand on steel structure of columns and anchoring systems. This product is suitable for PV power plant projects requiring large spans or complex terrain conditions, and has potential in reducing the number of pile foundations and steel consumption.
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The double-layer suspended wire flexible photovoltaic (PV) mounting system employs an upper and lower cable truss structure, forming a load-bearing and stabilizing double-layer cable net through prestressed steel strands. This allows for a larger span (typically 30–40 meters) and higher clearance (usually below 8 meters). Compared to conventional fixed mounting structure, the foundation usage may be reduced, making it suitable for PV projects requiring reduced ground disturbance or improved land utilization. Primarily designed for wastewater treatment plants, agricultural-photovoltaic integration, and fishery-photovoltaic integration, it is adaptable to various terrains including mountains, hills, plains, deserts, and coastal areas.
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