As global renewable energy installation surges and grid-scale energy storage becomes a core pillar for new power systems, fiber-reinforced polymer (FRP) pultruded profiles are emerging as a high-performance alternative to traditional steel and aluminum for lithium-ion containerized storage, flow battery energy storage and diversified stationary energy storage projects. Nanjing Spare Composites Co., Ltd., a top Chinese FRP pultrusion manufacturer with nearly 30 years of R&D and manufacturing experience, has rolled out a full lineup of tailor-made FRP structural products specially optimized for the energy storage industry, securing bulk orders from domestic and overseas EPC contractors and energy storage equipment makers in Europe, Southeast Asia and the Middle East in 2025–2026.
Driven by stricter safety standards for battery thermal runaway prevention and long-term cost control demands of storage plant operators, metal structures gradually expose inherent drawbacks: steel frameworks rust under high humidity and chemical volatilization inside battery prefabricated cabins, aluminum conducts electricity easily to raise short-circuit risks, and both materials bring excessive dead weight that lifts container transportation and on-site installation costs. In contrast, pultruded FRP manufactured via continuous fiber pulling molding delivers unmatched comprehensive advantages ideal for storage scenarios: non-conductive insulation property eliminates hidden electrical hazards inside high-voltage battery compartments; customized flame-retardant V0-grade resin formulation blocks heat spread during abnormal battery heating; outstanding corrosion resistance stands against electrolyte mist, coastal salt spray and acidic vapor from vanadium and iron-chromium flow battery workshops; meanwhile, FRP weighs only 1/4 of equivalent steel while maintaining comparable structural rigidity, cutting overall frame weight by 40%~50% and greatly lowering long-term maintenance expense throughout a storage facility’s 20+ year service life.
Nanjing Spare’s core pultruded FRP storage product portfolio covers three mainstream energy storage application segments. First, for containerized lithium energy storage, the company supplies standard FRP square tubes, I-beams, U/C-shaped channels and solid flat bars, widely used as cabin internal keel frames, battery PACK layer supports, high-voltage busbar insulation trunking and ventilation louver borders. Many mainstream commercial & industrial storage cabinet manufacturers have replaced partial steel frames with Spare’s modified pultruded FRP to upgrade system safety rating. Second, for all-vanadium and iron-chromium liquid flow energy storage, Spare develops vinyl ester-based anti-corrosion FRP profiles for electrolyte tank supports, electro-stack mounting frames and pipeline fixing brackets, perfectly resisting erosion from strong acidic electrolyte where regular carbon steel would fail within 2–3 years. Third, for auxiliary onsite construction of all types of energy storage power stations, Spare provides FRP guardrail tubing, walkway grating supporting beams and access ladder profiles for tank area safety fencing and operating platform framing, which dominates outdoor corrosive storage site infrastructure market share.
Backed by two modern production bases in Shenyang and Yizheng with over 50 automated pultrusion production lines and more than 600 sets of precision custom molds, Spare’s in-house R&D laboratory independently develops formula upgrades for storage-specific FRP: adjustable flame retardancy, UV stabilization for outdoor cabin parts and high chemical inertness for flow battery environments, complying with international IEC and EU storage component certification standards Spare Composites. The firm’s technical team also provides one-stop customized section design service per clients’ storage cabinet drawings, realizing small-batch trial production and mass standardized delivery in short lead time, a core competitive edge recognized by global storage system integrators.
Looking ahead to 2026–2028, the global stationary energy storage market maintains over 30% annual compound growth. Nanjing Spare plans to expand dedicated storage-grade FRP production capacity and deepen cooperation with leading domestic and international energy storage enterprises, continuously innovating lightweight composite structural solutions to accelerate FRP’s penetration replacing conventional metallic materials across the whole energy storage industrial chain, supporting the worldwide clean energy transition with reliable advanced composite products.
