Joysun All-in-one Stacked Three Phase Hybrid(off-grid) ESS was an integrated all-in-one stacked house hold battery energy storage system that stores your solar energy for backup protection, which is adopted most advanced LiFePo4 battery, hybrid inverter(with MPPT) and smart energy management software to efficiently manage solar energy usage throughout the day. It is an intelligent home energy storage solution that is safe, long-lasting and the output could realize 220V/380V, 230V/400V,240V/415V, it can connect with solar panel,grid,(or generator), load, to store excess solar power for use at night and provide reliable emergency backup power during grid outages. When the grid goes down your power stays on. Your system detects outages and automatically recharges with sunlight to keep your appliances running for days.