This product is a solar energy storage battery pack to store power upon strong sunlight and release power upon weak sunlight. By smart charge and discharge, it stabilizes the power use and balances the supply / demand. It is used in garages, houses and buildings. The design is concise and adaptable with the block and face form and large fillet on the sides. It looks succinct and elegant and exhibits reliability and firmness. The structure is compact. Indicator and switch in one button, hidden handle and terminal make it more concise. No screw on the external surface; the cap works directly without any tool.