This paper proposes a combined adaptive droop based load sharing, MPP tracking and energy management of photovoltaic (PV) based DC microgrid system. A proportional droop index (PDI) algorithm is introduced, which is a function of normalized current sharing difference and voltage deviation in the output side of the converter. The proposed method calculates adaptive virtual resistance Rdroop, which allows the PV converter to operate at MPP or load sharing mode. By fine-tuning Rdroop values, the proposed method eliminates poor voltage regulation issues of the conventional droop method. The control of hybrid energy storage system (HESS) with battery and super-capacitor (SC) is also discussed to stabilize the DC grid voltage and energy management of the DC microgrid. The detailed analysis and design procedure of low voltage (LV) DC microgrid systems are explained and the effectiveness of the proposed method is verified by simulation and experimental studies. IEEE