The initial question any solar cooker asks is how much heat is produced. Unfortunately, I don’t have a precise answer. Taking the temperature of a cooking surface is more difficult than taking the temperature of a cooking area. However, the grill produced enough heat during the late summer in Los Angeles to brown meat in about 10 minutes, to cook corn on the cob in about 15 minutes, to burn green beans in about 15 minutes, and to burn eggplant in about 20 minutes. In short, it produced levels of heat comparable to a kitchen stovetop.