The product is a single phase system, the output and Ac input is 220V/230V/240V; it canconnect with solar panels, grid (or generator), load, it built-in lithium battery, hybrid inverterand energy management system. Its hasfour working modes: soL(Solar first), UEl(Utilityfirst), SBU(solar-Battery-Utility), SUB(Solar-Utility -Battery). These working modes aredescribed referring to the setting part on user manual.