Here is another cooker that lets you use sunlight to cook meat, bake a bread, and prepare everything else. It has a weather resistant design. The cooker can be assembled easily and has a rotating frame. It can boil 1 liter of water in 9 minutes and lets you cook for up to 8 people.
This solar cooker is rated 700 watts with a cloudless sky. You can find out more about it here.