Some problems with the use of solar energy:

• The most important problem facing researchers in the fields of solar energy utilization is the presence of dust and try to clean solar devices it has demonstrated ongoing research on this topic that more than 50% of the effectiveness of solar energy lost in the case of non-cleaning device future to the sun for a month.

The best way to get rid of the dust is the use of continuous cleaning methods at intervals not exceeding three days for each period and these methods vary from country to country based on the nature of the dust and the nature of the weather in that country.

• The second problem is storage of solar energy and take advantage of them during the night or on cloudy days or dusty days and depends storage of solar energy on the nature and amount of solar energy, and the type of use and the period of use in addition to the total cost of the way storage and prefers not to use devices for storage to reduce the cost and benefit rather than that of solar energy directly only when its existence and is the subject of solar energy storage of topics that need to be more scientific research and new discoveries.

The storage temperature by water and rocks the best ways in the present time. As for the storage of electrical energy is still common method is to use liquid batteries (lead-acid batteries).