Solar panels are perhaps the most significant technological breakthrough in recent history. In layman’s terms, a solar panel is utilised to collect energy from the sun. This energy is stored in solar cells, which when exposed to light or heat are transformed into electricity. The actual conversion of sunlight into electricity is a rather complex procedure and the efficiency of such transformation depends on several factors. But one of the biggest contributing factors to the efficiency of solar power is the quality of photovoltaic cells.
The science behind this conversion process is fairly uncomplicated but the key factor is the absorption of photons (light particles) from sunlight. Photons (light particles) have the wonderful ability to move energy from a point in the universe to an area of specific interest at a definite charge. The light absorbed by solar panels is in the form of electrons, and these electrons are constantly being knocked around the solar cell, competing against each other for space with photons of light. Electrons move when energy hits them, creating an electric current. When the current created in the electric circuit is in excess of the maximum rate that solar panels can produce, then an electric current is created and the circuit is turned on, and thus begins the process of converting solar energy into electricity http://solarkhanhhoa.com/dien-nang-luong-mat-troi-tai-nha-trang/.
However, solar panels are not efficient enough to produce electricity needs alone. Solar electricity must be converted into usable energy for our homes. And the conversion process is a lot more complicated than simply knocking electrons loose from the solar cells. Photons are captured by the solar panels in their raw form: light. Light is in fact a lot more efficient at producing electricity than electrons. If we want to produce electricity using solar electricity then we must somehow take photons back in time and change them back into energy useful to our home appliances and household needs.
Photons that hit the photovoltaic cells can be knocked free and enter back onto the open circuit. In doing so, electrons are bumped off to one side and energy is produced as photons. But this energy is not in a useful state to us yet, because it has been captured by the photovoltaic cells. To transform this captured energy into electricity, we must use what is known as an ‘active’ photovoltaic cell. These active cells catch light passing through and bend it around so that it becomes possible to turn the light into electricity.
An active cell is made up of numerous interconnected photovoltaic cells; each of these cells is designed to use energy coming from a different input, which allows the user to control how electricity is generated and stored. This is how an off-grid solar power system differs from the solar panels on a home. With off-grid systems you do not need to rely on any external energy sources to power your home. Your home is capable of producing its own electricity.
By using an array of photovoltaic cells you can turn your lights on at night and even switch your heater on in the winter. This ability to regulate the temperature in your home is provided by the activity of the electrons in the cells. The electrical energy that is created in the process of converting the photons to electricity is captured by the PV panels and converts it into usable electricity. It sounds rather complex but it is surprisingly simple once you have learned the basics.