How to wire solar panels together?

When it comes to wiring solar panels together, there are two main options: series and parallel. In this article, we will focus on wiring solar panels in parallel and provide a diagram to illustrate the setup. Wiring solar panels in parallel means connecting the positive terminals of each panel together and the negative terminals together.

How to wire solar panels in parallel?

Wiring solar panels in parallel is achieved by connecting the negative terminal for two or more modules, while doing the same thing with the positive terminals. The process is the following: Take the male MC4 plug (positive) of the modules and plug them into an MC4 combiner.

Why do solar panels need to be connected in parallel?

The connection of multiple solar panels in parallel arises from the need to reach certain current values at the output, without changing the voltage. In fact, by wiring several solar panels in series we increase the voltage (keeping the same current), while wiring them in parallel we increase the current (keeping the same voltage).

Can two solar panels be connected parallel?

On the other hand, if our two solar panels have both different wattage and different voltage, then parallel connection is not possible, since the panel with the lowest voltage would behave like a load, and would begin to absorb current instead of producing it, with the relative consequences. What if we have one 12V panel and two 6V panels?

What happens if you wire solar panels in parallel?

This means that if you wire four 12V solar panels in parallel, the total voltage output will still be 12V, but the current output will be four times higher than that of a single panel. Here is a diagram illustrating the wiring of solar panels in parallel:

Should a solar panel be parallel or series?

Choosing between parallel and series wiring depends on your system’s needs. Parallel is perfect for more current without upping voltage. Series fits if you need higher voltage. Consider your charge controller and shadowing too. How do I ensure my solar panels are compatible for a parallel connection?