The Sunbank 40 gallon solar water heater is a complete passive solar water heating system that is easy to install, efficient, and affordable. It includes the tank, evacuated tube collectors, and bracket. The SB-40G has a durable stainless steel inner tank and a corrosion resistant painted steel outer tank and bracket. The system is heated by 15 evacuated tube heat pipe collectors and can be installed as a pre-heater to your existing system or a stand alone heater with the heating element and controller accessories. The SB-40G has a standard 10 year warranty on the collectors and 1 year warranty on all other components of the system.