Abstract
To satisfy the requirements of hot water, the use of clean and inexhaustible renewable energy, due to their availability is a necessary and urgent need.
Specifically, the study depends on a variety of parameters attached to the operation of a solar water heater, taking into account the thickness of the absorber or insulation as well as the rate cover and even the daily consumption to put in place mechanisms to improve the performance of this system. For example, the numerical results obtained by using Matlab, enabled us to find the best surfaces for implantation, as well as the total annual load heating.