The exact amount of time needed to bake depends on the type of solar oven, how hot the oven gets, the outside weather, and how diligent the cook is to keep the solar oven focused to the sun. It took my pie 2½ hours to bake on a sunny but 60 degree day, with a high oven temp of 340 degrees.
In the kitchen, bake at 350 degrees for 1 hour