How should solar panels be connected throughout the solar power system? Series or parallel?
——The main difference between parallel and series solar panels lies in the change of voltage and current, as well as the difference of system stability and wiring complexity.
Series Connection
The series increases the total output power without increasing the current flowing through the output line. This saves the circuit from having to replace thicker output lines, which is advantageous when transmitting over long distances. But when two solar panels are connected in series, if one of them is damaged and loses its power generation capacity, the whole circuit will be blocked, stopping the transmission of power to the outside, because the whole circuit has become a broken circuit.
1.Voltage increase: When solar panels are connected in series, the voltages of each panel are added up, and the total voltage is equal to the sum of the voltages of each panel. For example, if the voltage of two solar panels is 12V respectively, the total voltage in series will be 24V.
2.Constant current: When connected in series, the current remains constant. It is assumed that the current of each plate is 5A, which is still 5A after series.
3.Increased power: As the voltage increases without changing the current, the total power will also increase. For example, two 300W solar panels in series will have a total power of 600W.
4.Stability: A major disadvantage of series is that if one of the boards is damaged or occluded, the current of the entire circuit will be affected, which may cause the entire system to fail.
Parallel Connection
Parallel does not change the voltage, is to increase the current value to increase the total output power, but correspondingly, the current becomes larger, the use of wire will need to be thicker. Compared with series, when solar panels are connected in parallel, when one of them is damaged and loses power generation capacity, an open circuit is formed, which will not affect the whole circuit, because the other solar panels can work normally. At this time, it will not affect the voltage of the whole circuit, but will only affect the output power because of the change of the output current.
1.Constant voltage: When connected in parallel, the voltage of all solar panels remains constant. For example, if the voltage of each plate is 12V, it is still 12V after parallel connection.
2.Increased current: When connected in parallel, the current will add up. For example, if the current of the two plates is 5A respectively, the total current will be 10A after being connected in parallel.
3.Increased power: As the current increases while the voltage remains constant, the total power will also increase. For example, two 300W solar panels in parallel will have a total power of 600W.
4.Stability: A major advantage of parallel connection is that even if one of the plates is damaged or occluded, the other plates will still function properly without causing the entire system to fail.
Solar PV T-type 2 to 1 branch connector
Of course, regardless of series and parallel, it is best to choose the same specification of solar panels, if you will different specifications of solar panels in series, the current value tends to the minimum current of the panels, parallel, the voltage value tends to the minimum voltage of the panels, so on the same circuit in the high power of the solar panel is a waste. For a simple device, a single solar panel system can be used to power it. It usually includes solar panels, storage batteries and battery controllers. Connect both the solar panel and the battery to the battery controller, and then connect the appliance to the battery controller.可。
Some inverters that supply power from the solar panel system generate very loud noise when they work, mostly in the shorter-wave band, and even into the amateur band. If this happens, do not forget to take the impact of the inverter into account.
If you have more questions or want to know more about solar power systems, please contact us and our professional team will be happy to provide you with support and answers.
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