The　conventional　automotive　air　conditioning　system　was　driven　by　internal　combustion　engine　or　power　battery,　which　increased　the　oil　consumption　and　vehicle　carbon　emission.　In　this　study,　a　direct　current　(DC)　air　conditioning　system　powered　by　solar　photovoltaic　module　(PV)　has　been　designed　to　solve　the　problem　of　temperature　increasing　inside　the　vehicle　when　stops　in　the　broiling　summer.　The　purpose　of　this　work　is　to　design　a　whole　DC　air　conditioning　system　with　R134a　as　refrigerant,　replacing　the　power　source　with　solar　energy.　The　result　shows　that　the　environmental　condition　in　the　vehicle　has　obviously　improved　by　the　DC　air　conditioning　system,　meeting　the　requirements　of　human　bodies.　In　addition,　in　the　experiment,　the　minimum　refrigerating　capacity　should　be　similar　to　1500W,　maintaining　the　thermal　equilibrium　inside　the　vehicle　under　the　sun　blazing,　when　the　vehicle　stops　and　no　person　inside.　The　work　will　prompt　further　research　of　solar　energy　and　development　of　solar　electric　vehicle　air　conditioning　system.　(C)　2018　Elsevier　Ltd.　All　rights　reserved.