![]() ![]() ![]() The solar cell captures the photon and excites an electron, creating electricity.Īs you can see, not every photon creates electricity in the cell: for residential solar panels, a high efficiency panel will convert around 20%, or a little more, of sunlight into power. ![]() The photon is absorbed by the cell and is converted into heat.The photon passes straight through the solar cell.At that point, one of four things might happen to the photon: Travelling at the speed of light, photons collide with the silicon in the solar cell. Light is made of elementary particles called photons. How solar cells convert sunlight into electricityĪ conventional solar cell works by converting sunlight directly into electricity. To understand what PERC is, we should first explain a little bit about how a solar cell works. One of the more common technologies that you’ll encounter is Passivated Emitter Rear Cell (PERC). In the ongoing race to create increasingly cheaper and more efficient panels, solar manufacturers turn to different technologies to give them an advantage. For a rooftop deployment with limited space, this can be a very important feature. The higher the efficiency, the more electricity you’ll get from the panel for the same amount of light. Solar panel efficiency refers to how much light a solar panel converts into electricity. If you’re a homeowner who is comparing solar panels, there are really only a few features that obviously differentiate one panel from another, and efficiency tends to be one that manufacturers place front and center. ![]()
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