External foldable monocrystalline silicon solar panel, using high-efficiency HPBC battery technology, still has excellent power generation ability in low light environments, high photoelectric conversion efficiency, and fast charging speed. The component structure is composed of multiple layers of high-quality materials such as PET, EVA, monocrystalline silicon solar cells, PCB, etc., with quality control at the source, balancing durability and stability. The product is equipped with an adjustable angle bracket that can be flexibly placed according to the lighting angle, maximizing the absorption of sunlight and improving power generation efficiency. The overall design supports folding and storage, is lightweight and portable, saves space, and is suitable for outdoor, camping, and mobile electricity scenarios. At the same time, it has stable high current transmission capability, guaranteed rated power, and stable performance in high temperature environments. It is a portable solar energy solution with high conversion rate and high reliability.