After reviewing more than 20 types of solar pool heaters, we finally picked 5 of the best models on the market. We did in-depth online research to decide which model should be at the top of our list and we have decided that the SolarPoolSupply 4′ x 12′ is the overall best pool heater. It is powerful, energy-efficient and delivers 1000 to with a temperature allowance of 10-degree Fahrenheit. We have gathered more models in order to help you choose exactly what you need. Therefore, if you are finally ready to invest in a top-notch solar heater for your backyard oasis, below you will find some models that will surely satisfy your needs.