The SST direct-mounted energy storage matrix, integrating power electronic battery stacks and energy storage-type power routers. By replacing traditional PCS and transformers with power routers, it enhances the conversion efficiency of the energy storage system, meets more refined battery management requirements, builds a safer system architecture, and achieves faster grid support capabilities. The levelized cost of storage (LCOS) of the energy storage system is reduced by 32%, and the internal rate of return (IRR) of the system investment is increased by 45%.