The Solar Collector The solar collector is made up of several vacuum insulated glass tubes that absorb the sun's rays. It contains a double tube design with intricate layers of borosilicate glass, aluminum, solar filament, and copper pipes. The unit works in such a way that the glass allows light in, connecting with the solar filament yet, the insulation prevents the heat/energy (just recently captured) from being released. Specifically, it absorbs at a rate of 93% but it has a heat loss of less than 6%. The glass tubes are sealed creating a smooth, nearly seamless casing. Borosilicate glass was selected not only due to its strength but also the ability to withstand warping (in either high or low temperatures). The solar collector frame is made of sturdy anodized aluminum and specifically designed to match and hold the 15, 20 or 30 tube collector units. The adjustable frame can be mounted anywhere from a 23 degree angle to a 46 degree angle. Depending on your solar zone and which way the back of your home is situated, the angle of your solar collector may be an important factor in obtaining the optimal amount of light. Back-Up Heater by Gulf Stream A back-up heater makes sure you have hot water instantly. This 9kw back-up heater has the most accurate wattage to match the needs of a medium family. What is most unique about this particular back-up unit is that it is flow sensitive. In other words, if hot water from the solar collectors isn't available (i.e. a dreary day), the back-up will heat only what you use not the entire tank. This flow sensing back-up heater is the latest development in solar technology, but most importantly one that saves you more money. Control Panel If the circulating pump is the heart of the system then, the control panel is the brain . It regulates the temperature sensors and activates the circulating pump to go on. This small electrical unit can be mounted on the wall and used to control the system as the homeowner dictates.