There is considerable research and field level performance of the greenhouse dryer under natural and forced convection mode all over the world. The greenhouse dryer under forced convection mode was found to be best for high moisture content crops; however the greenhouse dryer under natural convection mode was found to be best for low moisture content crops. Crops dried in the greenhouse dryer are of a superior quality and colour as compared to open sun drying. Study reveals that the PV integrated solar greenhouse dryers are most applicable in the production of dried crop in commercial scale in Southeast Asian countries. It can be applied in the remote area since it is free from requirement of grid-connected electricity. Simulation models are proposed by the researcher to provide the design data for the selection of the optimal dryer.