Residential PV energy storage is a fast-growing market for LFP batteries, widely used in villas and private houses. Electricity generated by rooftop PV supplies household appliances first, while surplus power is stored in LFP batteries for night or rainy days to reduce reliance on municipal grid. LFP storage products feature high safety without fire or explosion risks, fitting indoor living environments. Equipped with intelligent BMS, they support remote monitoring and scheduled charging-discharging. They automatically switch to off-grid mode during blackouts to sustain basic power for refrigerators and lighting. Such systems gain rising popularity in Europe and America, and become mainstream low-carbon choices for domestic families.