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Solar DC pump system is easy to install and operates full automatically without watching. Solar DC pump needs less solar panels to run than the AC pump. A simulation model is necessary for the manufacturer to assess the performance of solar pump controller. Solar DC Pump consists of solar PV Modules, solar DC controller, and submersible DC pump. Solar cells have nonlinear I-V characteristics, efficiency of PV module is low and output power depends on solar isolation Level and ambient temperature. Main point to consider, there will be great loss of power due to mismatch of source and load. So to extract the maximum power to load from PV panel MPPT is implemented in the boost converter circuit using PWM and Microcontroller. The proposed design optimizes the solar power System to deliver the maximum power to load from source and is presented in the developed Simulink model. This model acts as a template for designing Solar DC pump of required rated capacity. In this work, Parameter extraction, Model evaluation, design & analysis of PV panel characteristics, modeling boost converter and DC pump motor are demonstrated using MATLAB/Simulink model.