How to connect solar panels in parallel and series

How to set up your solar panel connection

When it comes to solar panel connection, there are a few ways you can connect multiple 4WD solar panels. You can use a parallel or series connection, or a combination of the two.


The diagram below illustrates how to wire solar panels in series or parallel.


Wiring multiple solar panels in series means you are wiring each panel to the next. This solar panel connection creates a string circuit. The wire that runs from the solar panel's negative terminal is connected to the next panel's positive terminal, and so on. Connecting in series is one of the easiest ways to connect your solar power systems.


Connecting two fixed solar panels in this way (same wattage) will multiply the system voltage by 2 and keep the output current at the same level.


Connecting solar panels in parallel is a slightly different process. All of the positive terminals of the solar panels are connected together, and all of the negative terminals of the solar panels are connected together. It's similar to when you jump-start a car - positive to positive, and negative to negative.


Connecting two portable solar panels, or any other type of solar panel, (same wattage) in parallel will multiply the total power output current by 2 and keep the system voltage at the same level.


Parallel solar panel connections should be made using ‘Y’ connectors available at REDARC. To have a complete and efficient system, it's also wise to incorporate a solar regulator into your solar energy set up.