SOLAR BASICS EXPLAINED

July 14, 2008

Solar cells absorb sunlight and convert it to electricity.

This is known as the photovoltaic (PV) effect, “photo” meaning light, and “voltaic” from voltage, or electrical potential.

Solar, or PV, cells are most commonly made from crystalline silicon. Each cell is a wafer thin disc that has been subjected to a process called doping. Minute amounts of phosphorous are added to form the very thin upper (or n-type layer), and minute amounts of boron are added to form the somewhat thicker lower (or p-type) layer.

This process turns the silicon from an insulator into a semi-conductor, and leaves the cell in a state of electrical equilibrium.

That is, until the vital ingredient, sunlight is introduced.

Solar Basics 

Metallic electrical contacts and an anti-reflective coating are added to the front surface of the cell, and an aluminized conductive material is placed on the back surface of the cell. Wiring completes the circuit.

When photons of sunlight strike the cell, electrons are released. They are moved through the silicon and are picked up by the electrical contacts. They move into the external circuit in the form of direct current (DC) – the type of electrical current in a regular battery. The power flows through the load (for example, a light bulb or a motor) and back into the solar cell on the lower side, completing the circuit.

The entire process is self-contained – there are no moving parts and no materials are used up or given off.

Layers of a Solar Cell
The solar or photovoltaic cell is the basic component of your solar electric system. Each cell alone produces only a small amount of electricity.

Solar cells are connected together and encased in a protective shell behind a sheet of glass to form a module or solar panel. Each panel has a metal frame and is equipped with connectors and can be transported and installed safely and easily.

Your solar electric system comprises a number of modules or panels that are variously arranged into a solar array. The particular configuration chosen will determine the amount of electricity your system produces.
To learn more about going solar contact HBS Solar. You may email us george@hbsadvantage.com

 

Our Edgewater, New Jersey store has introduced solar energy as a power source by installing solar panels made by BP Solar on our facility’s roof. The system will meet more than 20 percent of Edgewater store’s needs. The solar array, composed of BP Solar panels covering 14,000 square feet on the store’s roof, turns the sun’s free energy into usable power. These solar panels are electrically interconnected to Xantrex PV GTI series inverters, which feed high quality AC power to the store’s existing electrical system and the utility grid at large.

The new solar electrical system is expected to create significant economic and environmental benefits. The system will produce and save more than 2.2 million kWhs over 20 years resulting in more than 1,650 tons of carbon dioxide (CO2) emissions avoided, the equivalent of removing 440 cars from the roadways, and reduce the impact on our country’s power grids.

Solar …. The New Sexy

To learn more about solar opportunities and incentives in NJ email george@hbsadvantage.com