With independent vertical layout and standard 8kWh capacity, floor-standing LiFePO4 batteries cover all household energy storage scenarios. Paired with solar panels, it stores clean energy for self-consumption to cut grid power usage and reduce tiered electricity fees by discharging stored power during peak hours. It can be placed in storage rooms and garages of urban apartments, or act as primary off-grid power for rural houses and suburban villas to run air conditioners, water pumps and all lighting. It switches to backup power within milliseconds during thunderstorms or grid maintenance to keep cameras and fridges running. The space-saving stable cabinet supports parallel expansion. It delivers steady power for daily energy saving and blackout emergency supply, serving as an all-round home energy storage device.