Solar Water Heaters were first invented around 200 B.C.E, these primitive systems were created by the intellectual and brilliant citizens of the Roman Republic and Empire. Their use in Rome was simple, they were supposed to help heat the public baths so that less coal and labor would be necessary. These systems were not completely independent at this time, but every idea has to begin somewhere. Following the collapse of the Roman empire systems that use the sun to heat water were forgotten for 1500 years. Finally, they were re-invented for commercial use in houses. Clarence M. Kemp patented the worlds first commercial solar water heater in 1891. This system was still very simplistic, it was basically a black water tank inside an insulated box with one glass side to heat up the water. The issue that arose due to these systems was that there was practical no control of temperature besides for the weather. These systems became popular in California and were used less extensively, but still used in Florida. The systems began having competition due to their popularity and more advanced systems such as one with a storage tank was created so that hot water could be used in the night as well. Freezing became an issue with solar water heaters in the early 1900's until this problem was again triumphed by a system with an antifreeze solution began being used. Again, the innovational idea of solar water heaters was overtaken, this time by gas companies. Around 1920, a thermostatically controlled gas water heater hit the Californian market and instantly overtook the primitive solar water heating designs. Everyone wanted a system where hot water could be made every day and they wanted a system where the heat of the water could be controlled. At the time, there was no technology available for solar water heaters to fulfill both of these requirements. If gas companies didn't replace all of the solar water heating systems, World War 2 did. The war made electrical water rates drop to half the cost which made them more affordable and allowed people to get the other cool machines that solar water heaters could't run. These machines included electric washing machines, electric driers, automatic dishwashers, and other revolutionary machines we still use today. Until the recent green technology revolution, these contraptions have disappeared again and are still not being used as often as they should. It is our turn, to bring back solar water heaters and make them even more efficient, affordable and useful.