The document discusses control strategies for interleaved flyback microinverters used in photovoltaic systems. It analyzes boundary conduction mode and discontinuous conduction mode control strategies, noting their different impacts on loss distribution and efficiency under varying loads. A new hybrid control strategy is proposed that combines two-phase discontinuous conduction mode control with heavy loads and one-phase discontinuous conduction mode control with light loads, to improve efficiency across a wide range of loads by reducing dominant losses. An optimal design method is also presented based on the boundary conditions of the hybrid control strategy.