All-in-one Stacked Single Or Split Phase Hybrid(off-grid) ESS is a single or split phase home energy storage system with grid power as complementary power. With built-in LFP battery, solar inverter and energy managementsystem(EMS), the product can connect with solar panels, grid(or generator), load. The Hybrid(off-grid) ESS four working modes: SOL(Solar first),UEl(Utility first),SBU(Solar-Battery-Utility),SUB( Solar-Utility -Battery ).These working modes are described referring to the settingpart on user manual.