The Sunmaster Flat Plate System 175L with 2 Collectors is a highly efficient and cost-effective system by Rinnai. Rinnai has been a trusted solar energy brand for over 45 years who design their products with innovative technology and the environment in mind. The system has a ground mounted storage tank that is installed separately to the collectors which are mounted on the roof. There’s no need to reinforce your roof and the collectors have minimal impact on the aesthetics of your roofline. A small pump circulates the water from the cylinder through to the collectors to absorb the maximum available solar energy.