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Ideal solar box cooker

A solar box cooker is transparent insulated box having a reflective lid. It is planned to withhold solar power and maintain its inner side warm. The upper part of the solar box cooker can be generally moved for handling the food and cleaning purposes. The box is covered from the outside by a reflector, generally aluminium foil, to reduce radiation heat loss. The walls of the box from inside should be ready to reduce radiation heat loss and reflect the light to the bottom and food. Containers for cooking and bottom of the cooker must be black.

The insulator inside the solar box cooker should be able to bear the temperatures up to one hundred fifty degree Celsius; Aluminium and cardboard are generally utilized as insulators. Vermiculite concrete and aerated concrete may be used also, however rarely are, as they are less available and heavier. The top is transparent and made of glass which hard to work with but durable, or oven bag, which becomes brittle after getting exposure in the sunlight but is easy and cheap to cut. The reflector is generally foil of aluminium, and very often an aluminium plate or sheet, and many times a glass mirror.