How to Wire Solar Panels in Parallel

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There are three ways to wire a solar panel array; series, parallel, and series-parallel. If the needs of your solar electrical system call for parallel wiring of your solar panels, this blog post will teach you how to wire your solar panel array in parallel.

Wiring solar panels in parallel simply means combining all of the positive wires together into one wire that will go to the charge controller and combining all of the negative wires together into one wire that will go to the charge controller.

To combine the wires from the solar panels, you will need to use MC4 branch connectors.

2 to 1 MC4 Branch Connector
3 to 1 MC4 Branch Connector
4 to 1 MC4 Branch Connector
5 to 1 MC4 Branch Connector

Depending on your choice of panels, you may also need to incorporate fuses into your parallel wired solar panel array.

15 Amp MC4 Fuse
20 Amp MC4 Fuse

All of the diagrams below show a parallel wired solar panel array with fuses in their proper place. If your setup does not need fuses, simply ignore the fuses and connect the positive wires directly to the branch connector.