What are the general requirements for the performance of steel materials for Solar Panel Mounting Brackets?

1. Tensile Strength and Yield Point
A high yield point can reduce the cross-sectional size of steel members, decrease the structural dead weight, save steel materials, and lower the overall project cost.
A high tensile strength can enhance the overall safety reserve of the structure and improve its reliability.

2. Plasticity, Toughness, and Fatigue Resistance
- Good plasticity enables the structure to undergo significant deformation before failure, facilitating timely detection of issues and implementation of remedial measures.
- It also helps adjust local peak stresses. For solar panel installation, forced installation is often adopted to adjust the angle;
plasticity allows the structure to achieve internal force redistribution, balancing the stress in areas with original stress concentration and improving the overall load-bearing capacity of the structure.
- Good toughness enables the structure to absorb more energy when damaged under impact loads.
This is particularly critical for desert power stations and rooftop power stations with strong winds (where wind vibration effects are prominent), as steel toughness can effectively reduce risks.
- Excellent fatigue resistance also equips the structure with strong capability to withstand alternating and repeated wind loads.

3. Processability
Good processability includes cold working performance, hot working performance, and weldability.
The steel used in photovoltaic steel structures must not only be easy to process into various structural forms and components but also ensure that such processing does not cause excessive adverse impacts on properties like strength, plasticity, toughness, and fatigue resistance.

4. Service Life
Since the design service life of solar photovoltaic systems is over 20 years, excellent corrosion resistance is also a key indicator for evaluating the quality of mounting structures.
A short service life of the mount will inevitably affect the stability of the entire structure, prolong the investment payback period, and reduce the economic benefits of the entire project.

5. Practicality and Cost-Effectiveness
On the premise of meeting the above requirements, the steel for photovoltaic steel structures should also be easily available and producible, with a low cost.