Abstract: Cascaded MLI shows high power quality, it posses less harmonic content in generated output voltage. THD of cascaded MLI is lesser compared to two-level voltage source inverter. Switching strategy of cascaded H-bridge MLI is quite easy compared to other MLI topologies major drawback is the requirement of isolated DC source. N level cascaded MLI require (N-1)/2 isolated Dc source to generate the desired level of output voltage. This study presents a new cascaded H-bridge multilevel inverter using single input multi output DC-DC converter suitable for photovoltaic applications. Single input DC source multi-output converter produces three isolated DC sources which can be utilized to generate seven level voltage by cascading three H-bridge circuits. Carrier phase shifted PWM technique is used to generate switching pulses for cascaded MLI. By varying modulation index of reference sine wave, THD of proposed multi-output DC-DC converter based cascaded MLI can be further reduced, THD of the proposed scheme is reduced to 8%. The proposed multi-output DC-DC converter based cascaded MLI is implemented in MATLAB/Simulink platform and results are presented.