Photovoltaic Cells Are the Building Blocks of Solar Panels
We’ve all seen them, those big, shiny solar panels sitting on roofs, quietly collecting clean, green solar energy, while the sun is shining down on them. These solar panels take energy from the sun and convert it into electricity for use by lights and appliances in your home. Let’s look further at these panels to investigate how they work in converting solar energy into electricity.
The fundamental building block of the solar panel is the photovoltaic cell. Photovoltaic cells, or photovoltaic cells, can be produced from a semiconductor material such as silicon. This semiconductor material is specially treated to form an electric field. The positive electric field on one side and negative on the other. When the energy of the sun reaches PV cell, is absorbed by the semiconductor material. The absorbed energy then turn loose electrons begin to flow freely.
If wires are connected to the positive and negative sides of the PV cell, it is possible to capture the current through the flowing electrons. When you combine PV cells in a frame or container, and connect them together, has been made a photovoltaic modules. Modules are designed to a certain voltage, usually to deliver 12 volts.
If you combine enough modules together to create what is called an array. In general, the larger the array, the more electricity produced. This electricity can then be used to power lights and appliances in your home, but not in its current form. Solar panels generate direct current, and your house usually runs on AC power. A device called an inverter is needed to change the DC to AC.
So just how much energy can catch our tiny PV cells? Well, unfortunately not too much. Even the best of today’s PV cells to achieve only about 40 percent efficiency, and most of the average of about 15 percent or so. Why so little return, especially if the sun shines so bright? However, in simple terms, visible light is only a small part of the electromagnetic spectrum, which is composed of many different wavelengths. The majority of the electromagnetic radiation that hits a PV cell is simply not usable.
Does this mean we should give up trying to generate electricity using solar power? Not a chance! On the contrary, progress in the way PV cells designed and manufactured have come a long way since we first started using solar energy, and will continue to evolve going forward. Costs associated with the use of residential solar power, although still high, continues to come down if we are to develop new methods and ideas of capturing the sun’s rays.
Savvy homeowners with a do it yourself spirit even find more ways to save money. They have found manuals and guides that teaches you all about green, renewable energy and actually show you how to build your own solar panels. Anyone who can make a lot of ready-to-assemble furniture can quickly and easily build their own solar panels.
Some of the best guides also come with videos that can help you along the way. A few have even forums where you can ask a question and get an answer fast. Thousands of homeowners across the country and around the world have seen the value in DIY solar panels and have begun a dent in their electricity bills.
Do your research today and you will see that the addition of clean, green renewable energy to your current plan is easier and cheaper than it has ever been. Take things into your own hands and start to save money every month. You’ll be glad you did.
Source: http://ezinearticles.com/?Photovoltaic-Cells-Are-the-Building-Blocks-of-Solar-Panels&id=3948501 by Ted Begnoche