What is a bypass diode?
APass diode is an electronic component usually built into the fields of solar panels that protect shaded or weak panels from overheating and potential damage. The fields of solar panels work correctly when all the outputs of each panel are balanced. If one or more panels become overshadowed, weak or non -functional and no longer produce this average power, they are caused by an excessive condition. This leads to hot spots in panel cells, causing a decrease in the overall efficiency of the field and eventually lead to thermal destruction of non -operative panels. The bypass diode is a simple and cost -effective method to prevent reduced overheating output because it simply cuts the affected panel from the perimeter.
When the solar panel is exposed to sunlight, what is called distorted in advance and transmits its output current in a specific direction. In the dark the panel becomes the opposite distortion and the current can flow in the opposite direction back to Cells and be scattered like TePlo. This situation is solved by the circuit of the charge controller, which ensures that no energy stored in system batteries at night does not reach the panels. When part of the illuminated solar field falls into the shade or becomes defective or weak, there is exactly the same condition. Shaded panels stop producing the current and become distorted.
The problem with this scenario is that the rest of the field still pushes the output current into the circuit, unlike the night conditions, where the whole field is sleeping. This sees that the output current flows back into the sleeping panel in an uncontrolled way. This causes the cells to distract a large amount of energy as a heat that will lead to overheating and possible thermal destruction of the panel. Another effect of this type of unbalanced output is the overall decrease in efficiency due to loss output of shaded cells and the working current has dispersed as heat. Cheap and simple way to overcomeThis type of situation is inserting a bypass diodes through each panel.
To solve this situation, a bypass diode is placed in parallel with each panel and in the opposite distorted direction with its positive terminal connected to the negative terminal of the panels and vice versa. If the panel works correctly, the reverse diode remains distorted and essentially sleeping. If the panel becomes shaded or otherwise non -functional, it reverses its polarity and begins to draw the current in the opposite direction. When this condition occurs, the simpler flow route offered by a bypass diode draws the working current around the defective panel back into a circuit that effectively protects it from overloading the hot point.