All you need is Sun Light to cook with BIOHOMES High Rise Solar Oven. This oven can cook at 3 different degrees at the same time, no matter what the outside temperature is. It also is a solar dehydrator for drying fruits, veggies, and making jerky. I have found all foods cook to perfection every time and never over cook. Tested at Project BIOHOME our oven out performs any solar oven I know of. These plans are somewhat adjustable to fit your needs. With simple and easy to follow instructions. You will have fun building your oven. Cost to build varies from $100.00 to $250.00. Complete plans sent to you via e-mail for $15.