An interleaved PV stand-alone dc bus system, equipping with incremental conductance (IC) derived MPPT and bi-directional dc-to-dc converter (BDC), manipulated by an energy management control (EMC) is proposed. The EMC can adaptively provide interleave control for pumping energy from PV panel without intermittence and maintain well load regulation through a bi-directional dc-to-dc converter (BDC).