Outdoor telecom base stations and cabinets are placed outdoors year-round with no shelter, exposed to strong sunlight. Equipment shells heat up rapidly, easily causing internal heat accumulation and unstable operation, increasing failure risk. To maintain normal operation, cooling equipment must run continuously, resulting in high electricity costs. Coating with the electricity-free cooling coating achieves power-free sun and heat protection, lowers equipment surface and ambient temperatures, and ensures stable operation of communication equipment.