In a large bowl, beat the sugar, oil, eggs and vanilla until well blended. Combine the flour, cocoa, salt, baking soda, cinnamon and baking powder; gradually beat into sugar mixture until blended. Sir in zucchini. Fold in the chocolate chips. Transfer to two loaf pans coated with cooking spray.
Bake at 350 degrees for 50 to 55 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pans to wire racks to cool completely.
