Hippy dippy prune drying

My three Italian prune plum trees are loaded with ripe fruit, so it is time to dry them to make prunes. The picture shows my system for drying the plums.  The plums are sliced in half and the pits are removed.  The fruit is placed on drying racks, and the racks are placed on my green house.  Under a hot Autumn sun, the temperature in the greenhouse reaches 110 degrees.  I use a 5W solar panel to power a small 12 V DC fan rescued from a dead computer.  The fan blows on the hot plums, speeding the drying process.  The same system works great for making sun-dried tomatoes.