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What You Really Should Discover About PV Solar Power
PV solar power is totally different from other types. Of the two major categories of solar power, active and passive, PV solar power is active. Let's look at it.
Solar Panel
Active solar energy relies on solar panels. You may imagine them as flat, rectangular boxes on rooftops.
There are two main types of solar panel. From a distance, both appear to be rectangular boxes. Both convert sunlight into energy, but in two completely different ways. The terms for the two solar panel types are actually solar thermal collector and photovoltaic module.
1. Solar thermal collector: This solar panel takes in solar power from the sun and uses it to heat air or water.
2. Photovoltaic module: This second kind of solar panel collects solar energy and converts it to usable electricity.
Meet the PV
To respond to the question, what is PV solar energy, we must know what the PV is. The short answer is that PV refers to a photovoltaic module. "P" is actually for photo and "V" for voltaic.
In simple terms, "photo" refers to rays from the sun and "voltaic" refers to electrical power. PV panels convert sunlight into electrical energy. Sunlight flows into the solar panel. Electric energy flows out of the solar panel.
A PV solar panel is made up of a lot of photovoltaic (light to volts) cells. These cells are electrically linked, and then covered with glass. The glass provides electrical insulation. It is also good protection from weather conditions and other damaging forces.
When minimal power is needed, similar to that necessary to power a small appliance, a single PV solar panel is sufficient. When much more power is needed, an "array" of solar panels is built by connecting panels to one another. If the power won't be supplied to the power grid, the solar panel(s) is connected to a charge controller, and battery. If it is intended for on-grid use, the solar panel array would be connected to an electrical inverter.
What Is PV Solar Power?
Typical silicon solar panels convert roughly 14 to 17 percent of sunlight into usable electricity. That isn't much. Late in 2006, though, a new solar cell was launched. Solar panels that utilize the brand new cell can convert into electricity 22 percent of the daylight they collect. Theoretically, the maximum that the cells of a solar panel could convert is said to be about 26 to 27 percent of incoming sunlight.
How does it work? Let's look at a very simple explanation.
Every photovoltaic cell in a PV solar panel is a semiconductor. When rays from the sun hits those cells, a specific part of the sunlight is absorbed by those silicon cells. The cells take in that part of the sunlight's energy. The cells then transfer the absorbed daylight's energy to the electrons in the silicon. The electrons start to flow, and this generates an electrical current. Metal contacts built into the top and bottom of the PV cells draw off that current and it is dispatched to the grid or battery. It is now usable electricity. The power grid sends it on its way, when you have used an on-grid connection. If you are using a battery, it's stored in the battery awaiting your need.
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