Stacked LFP energy storage systems are designed for families equipped with EV chargers to balance heavy charging loads. Single module capacity: 5.12kWh, matched with 12kW energy storage inverter. Maximum 8 stackable modules, expandable capacity 40.96kWh. Continuous max load 12kW, short peak load 18kW. It stores electricity during low-tariff periods or solar generation for EV charging at night, preventing grid overload caused by high-power equipment. Intelligent scheduling optimizes charge-discharge sequence. Flexible modular expansion supports capacity upgrade as demand grows. It realizes both electricity cost saving and backup power, ideal for EV owners.