Sos Roofline Systems

In most 3rd world places, where electricity and other fuel sources are hard to come by, solar oven designs have been used. Not only are they effective in cooking food, but also for water purification in sunny countries like Sudan.

But just because first world countries have enough energy supplies, it does not excuse us from using solar cooking at home and helping to conserve that energy. What’s great about solar cooking is that it uses the power of the sun to cook food – though it may take 4 times longer than a conventional oven.

There have been a variety of unique solar oven designs thought up, but they can be categorized in three shapes: parabolic, panel, and box cookers.

Parabolic Shape:

A parabolic solar cooker, as the name implies, is made from any reflective material in a parabolic (bowl like) shape that focuses sunlight to a single point. It is the most effective at cooking food quickly and efficiently, however, it tends to be more expensive and hard to make by hand. Furthermore, its fixed shape makes it less portable and raises some safety concerns.

Panel Cooker:

Similar to the parabolic design, the panel design focuses sunlight to a single point. However, it is less rounded and made up of a number of small, flat, reflective panels.

Although not as effective as a parabolic cooker, it is safer, easier to make, and can be folded up for portability. Panel cookers come in a number of innovative designs, the simplest being made from a fold-able, reflective windshield shade.

Box Shape:

Very different to the other two designs, the box cooker works by trapping the sun’s heat, instead of simply focusing it on a central point. It is designed in such a way that it let’s light in, but stops that heat from escaping. As more sunlight comes in, the hotter it gets.

This results in the entire area of the box to get hot and be able to cook larger portions of food at a time. This design is by far the simplest to put together – all you need is a black cardboard box with one side covered in tin foil and a sheet of clear perspex or glass on top to hold in the heat.

In fact most of these solar oven designs can be made from household materials in a short space of time. And what you can cook in them is really limited to your imagination – you can bake bread, steam vegetables, make stir-fries and even a roast chicken in them. Another advantage is the amount of power you’ll save – unlike a conventional oven, your cooker needs to be outside to operate, so it put less strain on your kitchen’s air conditioning system.

To think that – according to the Residential Energy Consumption Survey – almost 75% of Americans prepare at least one hot meal at home per day, 33% prepare two or more, a large amount of electricity can be saved if more of us try solar oven design at home.

So get started cooking with solar today. There are a number of commercially available solar cookers on the market. Alternatively you can make your own at home by searching online, where a variety of free solar oven designs with full building instructions are provided.