Site Survey for PV Installation

One of, if not the, most exciting portions of the overall system installation process is the site survey. Why? Because you get to work with a blank slate (after all, the client shouldn’t have another PV system anywhere on his building or property) and create a PV system from the ground (or roof) up. As the person who performs the site survey, you need to be able to identify any potential trouble …

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PV Arry Charge Controllers 

PV Arry Charge Controllers  Charge controllers are used to control the current coming from a power source.  The charge controllers that are commercially available come in a variety of sizes and have an assortment of features. Small charge controllers can be used in very small systems with one or two PV modules charging a small battery bank. Larger …

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JFET Construction and Working

JFET Construction and Working The junction field-effect transistor (JFET) is a three element electronic device. Its operation is based on the conduction of current carriers through a single piece of semiconductor material. This piece of material is called the channel. An additional piece of semiconductor material is diffused into the channel. This element is called …

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Light Sensitive Devices

Light Sensitive Devices Light-sensitive devices include photo cells, solar cells, photo-diodes, and photo-transistors.  Photo Cell It is a light-sensitive device in which the internal resistance changes with a change in light intensity. The resistance change is not proportional to the light striking it. The photo cell is made from light-sensitive material such as cadmium sulfide …

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