The system is used to boost 20 V (from a solar cell or other sources) to 400 V. The converter is used to obtain 400 V which needs for integrating to 400V DC bus. Interleaved boost converters at the input side and Dickson charge pump based voltage multiplier at the output side are the main parts. Single source or two independent sources can be used. The modified Dickson charge pump voltage multiplier results in lower voltage stress on each capacitor for its voltage multiplier circuit and less number of diodes. Interleaved boost converter and Dickson charge pump voltage multiplier have been studied, designed and simulated. The design, open loop simulation and closed-loop simulation of the interleaved boost DC-DC converter based on modified Dickson charge pump voltage multiplier were done and compared with a conventional boost converter. The desired output voltage (400V) obtained. From the simulation results, it is evident that the output ripple voltage of the system with modification exhibits fewer ripples and it offers continuous input current than the conventional one. Also, the voltage across the capacitor is reduced and become uniform. Hence low rated capacitors with the reduced size are needed. The hardware part for the interleaved boost DC-DC converter based on modified Dickson charge pump voltage multiplier and conventional boost converter with Dickson charge pump voltage multiplier was done and desired output was obtained.