If the area around a house is covered with trees for shade, a solar cooker might have to be moved too far away from the house to be acceptable.If theft at night is a big problem, poorer households may not be able to store a huge solar cooker in their house, because of the limited space.If heavy stirring of food in a big pot is required to prepare the staple food, women or girls may find it inconvenient to cook on some of the bigger solar cooker models.If constant attention by the cook is required for certain meals, solar cookers might not be acceptable, as the cook is exposed to the sun the whole time.If sitting on the ground while cooking is a very important feature, some solar cookers aren´t acceptable because of their design.If overcast at noon is a frequent occurence, food preparation for lunch might be unreliable on a solar cooker.Food could also be placed in a fireless cooker – an isolated container – to keep it warm, for later consumption. One option is that food is precooked on the solar cooker and reheated with other cooking possibilities.
If cooking at dawn or sunset is a common feature in the daily routine of the target community, a solar cooker may not be suitable.The sunlight might be strong all year round, but in the tropics it is restricted to approximately 12 hours a day, with variable intensity.In any case a detailed assessment of the baseline cooking habits and important factors such as convenience, availability, affordability and reliability are essential to elaborate on the potentials of supplemental solar technologies to an existing household energy mix: All in all, over the year in a whole, fuel savings amount to roughly 30%-40%. It is also very much dependent on the local climatic conditions, which can vary tremendously over the course of a day or a year. To which degree solar energy can replace other fuels depends on local dishes and cooking habits. Solar energy can be an ideal component of the energy mix of a household to complement other combustion-based stoves that can produce heat on demand based on other fuels.
It only works when the sun shines, so solar cooking can never be a stand-alone technology.
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