DRYERS FOR AGRICULTURAL PRODUCTS USING SOLAR ENERGY VINASAY, Vietnam is a pioneer and market leader in commercializing solar dryer technology for a variety of agricultural products. Our Poly Carbonate Solar Dryers are available in a variety of capacities, ranging from small household applications to large commercial applications.DRYERS FOR AGRICULTURAL PRODUCTS USING SOLAR ENERGY VINASAY, Vietnam is a pioneer and market leader in commercializing solar dryer technology for a variety of agricultural products. Our Poly Carbonate Solar Dryers are available in a variety of capacities, ranging from small household applications to large commercial applications.