In summary, series and parallel connections for solar panels offer distinct advantages and considerations. Series connections increase voltage and are suitable for high-voltage applications, but they are sensitive to shading.
The output voltage and current are the key differences between wiring solar panels in series and parallel. When many panels are connected in series, the output voltages add up, and the output current stays the same. When multiple solar panels are connected in parallel, their output currents add up, but their output voltages remain constant.
Yes, you can wire solar panels in series or parallel. In some cases, you can even wire solar panels in both series and parallel simultaneously. For example, if you have two panels with 12V each, wire them in series to start. Then, assuming you have another 24V panel, you can wire them together in parallel.
A series connection is formed when the positive terminal of one panel is connected to the negative terminal of another panel. A PV source circuit is formed when two or more solar panels are connected in this manner. When solar panels are connected in series, their voltages add up, but their amperage remains constant.
This makes series connections less suitable for installations with potential shading issues. In a parallel connection, solar panels are connected in parallel, with all the positive terminals connected together and all the negative terminals connected together. Here are the key characteristics of a parallel connection:
For parallel connection, please connect the positive and negative cables of one module and the second module correspondingly. A parallel connection between 4 solar panels could quadruple the amperage. Voltage and wattage output remain the same. If you’re worried about the current being too low, consider wiring the four PV panels in parallel.