Solar plus energy storage is the mainstream solution for household energy independence, and the 51.2V 314Ah 16KWh LiFePO4 battery is widely matched. Solar panels capture energy during daytime and store power inside the battery, solving the problem of surplus daytime power and power shortage at night. During grid outages, the system switches to off-grid mode rapidly to secure essential loads. It realizes peak shaving to maximize green power utilization and cut grid electricity purchase. The vertical integrated design simplifies wiring and installation. High-safety LiFePO4 cells with multi-level electrical protection fit villas, self-built houses and small shops. In the long run, it reduces power bills and improves home resilience to build sustainable residential energy systems.