PV solar power is different from other types. Of the two major kinds of solar power, active and passive, PV solar energy is active. Let's take a look at it.
Solar Panel
Active solar energy relies on solar panels. You could picture 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 change sunlight into electrical power, but in 2 completely different ways. The terms for the two solar panel kinds are solar thermal collector and photovoltaic module.
1. Solar thermal collector: This solar panel takes in solar power from the sunlight and makes use of it to heat air and water.
2. Photovoltaic module: This next kind of solar panel collects solar energy and converts it to usable electrical power.
Meet the PV
To answer the question, what is PV solar energy, we have to know what the PV is. The short reply is that PV pertains to a photovoltaic module. "P" is actually for photo and "V" for voltaic.
In simple terms, "photo" pertains to sunlight and "voltaic" refers to electrical power. PV panels convert sunshine into electrical power. Sunshine flows into the solar panel. Electric energy flows out of the solar panel.
A PV solar panel is actually made up of many photovoltaic (light to volts) cells. These cells are electrically linked, and covered with glass. The glass offers electrical insulation. It's also good safety from weather conditions and other destructive forces.
When minimal energy is needed, similar to that essential to power a small electrical device, a single PV solar panel is enough. When much more power is required, an "array" of solar panels is created by connecting panels to one another. If the power won't be provided to the power grid, the solar panel(s) is connected to a charge controller, and battery. When it is meant for on-grid use, the solar panel array would be connected to an electrical inverter.
What Is PV Solar Energy?
Conventional silicon solar panels convert around fourteen to seventeen percent of sunshine into usable electrical power. That is not much. Late in 2006, though, a new photo voltaic cell was introduced. Solar panels that utilize the brand new cell could convert into electrical energy twenty two percent of the daylight they collect. Theoretically, the most that the cells of a solar panel can convert is said to be about 26 to 27 percent of incoming sunshine.
How does this work? Let's take a look at a really simple explanation.
Every photovoltaic cell in a PV photo voltaic panel is a semiconductor. When sunlight hits those cells, a specific part of the sunshine is absorbed by those silicon cells. The cells take in that part of the daylight's power. The cells then transfer the absorbed daylight's energy to the electrons within the silicon. The electrons begin to flow, and this generates an electric current. Metallic contacts built into the top and backside of the PV cells draw off that current and it's dispatched to the grid or battery. It is now usable electrical power. The power grid sends it on its way, if you have used an on-grid connection. If you are using a battery, it's saved in the battery awaiting your need.
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