How it works

 

 Concentrating sunlight: 
- Reflector inside of umbrella concentrates light and heat from the sun into a small cooking area and makes the energy 
more concentrated and therefore more potent.
Converting light to heat: 
- Placing a pot or pan in the focal point allow you to boil water or cook. Usually solar cooker doesn't need special pots or pans 
but dark and thin wall pots work best because dark color absorb almost all of the sun's light and turn it into heat. 
Also, the better a pan conducts heat, the faster the cooker will work.
Trapping heat:
- Isolating the air inside the cooker from the air outside the cooker makes an important difference. 
Pots with lids can hold steam in the pot. 
This makes it possible to reach similar temperatures on cold and windy days as on hot days