The purpose of developing a solar oven. To study the process of designing a solar oven built. Drying and comparison with solar drying cabinet. And the sun in a natural way. The detailed results of the study are as follows. The physical characteristics of a banana that has a diameter of the head, the middle position, the length and weight to the average of 27.83 30.44 28.08 78.85 mm and 44.62 grams, respectively, for the design, build cabinets, solar drying height. 130 cm long, 126 cm wide, 86 cm and for the ease of use and mobility. Test results compare with oven dried banana and dried in the sun. The volume of bananas the study of three kilograms storage test period. 08.00 to 16.00. Within five days of test data recorded every two hours from the test results showed. When comparing the average temperature outside the oven and the oven was 36.60 degrees and 40.09 degrees, a temperature increase of 3.49 degrees, with humidity percentages outside the oven and the oven was
43.27 percent and 33.53 percent, with the percentage of moisture content as 9.74 percent rate. Evaporation outside the incubator and the incubator of 0.66 g water / hour and 0.73 g water / hour rate volatility as well as 0.07 g water / hour and minimal drying outside the incubator and the incubator of 0.70 percent humidity. / hour and 0.94 percent humidity / hour with the drying rate as 0.24 percent humidity / hour.
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