2026-08-17
In the implementation of photovoltaic (PV) projects in Russia, most purchasers and engineering companies often face prevalent quality risks due to ambiguous understanding of accessory materials and unreasonable matching logic. Blindly purchasing brackets and clamps of identical materials while ignoring the professional matching standard of "steel brackets + aluminum clamps + anti-corrosion fasteners" frequently leads to on-site problems such as clamp embrittlement and cracking, bracket corrosion, module displacement and accessory loosening after project completion. These issues significantly increase the subsequent maintenance and replacement costs of PV projects. Based on years of experience in PV export and project implementation for the Russian market, and in combination with Russia’s special working conditions of extreme cold, strong winds and high humidity, Zhongtang Group has compiled a comprehensive risk avoidance guide for the bulk procurement of PV brackets and supporting accessories, providing professional references for Russian purchasers to select products accurately and eliminate project risks.
Key Risk Avoidance Points for PV Bracket Selection
As the load-bearing core of the entire PV system, steel brackets determine the overall stability of PV projects, and their selection and adaptability are crucial. For light-duty color steel tile roofs, lightweight hot-dip galvanized U-shaped steel guide rail brackets are the preferred choice. Featuring light self-weight and low roof load, they effectively prevent roof overload and are suitable for most civil residential PV projects. For heavy-duty concrete roofs, zinc-aluminum-magnesium H-shaped steel fixed brackets matched with high-strength foundation anchor bolts are recommended, which deliver excellent wind resistance, compression resistance and deformation resistance, ideal for large-scale industrial and commercial PV projects.
Zhongtang Group reminds industry practitioners that ordinary spray-painted brackets are strictly prohibited in extremely cold regions of Russia. Only steel products with hot-dip galvanizing and zinc-aluminum-magnesium high anti-corrosion processes can withstand extreme low temperatures of -40℃ and rain and snow erosion, completely eliminating hidden dangers such as bracket rusting, deformation and collapse.
Core Selection Criteria for PV Clamps and Press Blocks
The standard material for PV module fixing clamps and press blocks is 6063-T5 aerospace-grade aluminum alloy, which forms a classic and reliable matching combination with steel brackets and serves as a core accessory for fixing PV modules. Quality identification is essential in bulk procurement. All aluminum clamps and press blocks of Zhongtang Group are forged from high-purity primary aluminum, featuring high toughness, low-temperature resistance, anti-cracking performance, light weight and permanent rust resistance. These products perfectly adapt to the harsh outdoor working conditions of extreme cold and strong winds in Russia.
In addition, the product occlusion accuracy and thickness parameters are strictly matched with steel guide rails and mainstream PV module frames, which thoroughly avoids safety hazards such as fracture, sliding and module falling off caused by inferior recycled aluminum clamps in low-temperature and strong wind environments. Aluminum alloy itself has excellent rust resistance and weather resistance and does not require the same anti-corrosion treatment as steel brackets, effectively helping customers control procurement costs.
Key Procurement Specifications for Fasteners
PV-specific bolts, spring washers and rivet nuts that connect steel brackets and aluminum clamps are the most easily overlooked but critical connecting accessories, as well as the main sources of PV system failures. Tailored to the complex outdoor working conditions in Russia, Zhongtang Group has clarified unified selection standards: 8.8-grade or higher high-strength galvanized bolts are mandatory for conventional areas; for high-altitude, strong wind, snow and extreme cold areas, 10.9-grade high-strength bolts matched with thickened spring washers are prioritized. This configuration effectively offsets the thermal expansion and contraction difference between steel and aluminum alloy materials, preventing accessory loosening and falling off caused by temperature changes.
Non-standard ordinary bolts and inferior washers are strictly prohibited. Although low-quality fasteners reduce short-term procurement costs, they are prone to corrosion and fracture in the long run, triggering major project risks such as clamp falling off and PV module damage.
Conclusion
Bulk procurement of complete roof PV accessories must strictly follow three core principles: anti-corrosion steel brackets, high-purity aluminum clamps, and high-strength fasteners, so as to realize material adaptation and performance complementarity of different accessories. Zhongtang Group provides one-stop supply of complete PV supporting products, which are fully adapted to local working conditions in Russia. We eliminate project hidden dangers from the source, ensure long-term and stable operation of PV systems, greatly reduce customers’ subsequent operation and maintenance costs, and serve as a reliable supplier partner for Russian PV engineering projects.
