Solararrayhasthefollowingnonlinearcharacteristic,suchaswhoseoutputcurrentincreases,outputvoltage isreduced.Forthisreason,boostconverterwith solararray system isalwayscontrolled to remain on the maximum powerpointofthesolararray.Inthiscase,wearenotfocusedontheoutputofthesolararrayand notconsiderefficiencyoftheboostconverter,whichisassumedreliable.Butefficiencyoftheconverteralsoshould beconsidered ,which affectsthetotalefficiency oftheoverallsolarenergy system.In thispaper,efficiency calculationoftheboostconverterusingpowerbalancemethodisproposed,whichwillbeusedforapowerful referencebeforehardwarerealization.