Third-world countries are suffering from an economic crisis that has caused an apparent deficiency in supplying electric power to people, and this has prompted researchers to find alternatives to providing hot water to homes, especially in Iraq. In this article, five innovative designs of solar storage collectors presented by Iraqi researchers as an alternative to water conservation tanks commonly used in homes in developing countries and Iraq will be compared. It is also noted that the triangular storage collector recorded the peak value of average water temperature among other designs. The storage water temperature of the triangle solar collector is about 45.5 °C. The outcomes disclosed that the maximum recorded temperature was in a triangular storage collector with a front area to storage volume ratio of 8.48 m2/m3. The cylindrical storage collector, which has a 5.67 m2/m3 front area to storage volume ratio, recorded the lowest temperature. Thus, area density is a crucial factor to consider when designing these solar storage systems.