Solar evacuated tubes pool heating systems deliver enormous benefits for heating a pool. Generally, vacuum tubes work in cloudy and indirect light conditions effectively. This means, you expect getting useable heat energy for your pool from sunrise to sunset and even in cloudy weather.When the ambient temperature is colder than the pool water, your solar water heater gets working. In fact, other pool heating systems only provide heat energy when the outside air temperature is more than the temperature of the pool. With an evacuated tube solar pool heater, you can extend your pool season by two to three months.