How to Connect Solar Panels in Parallel

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Solar panels at work.
Solar panels at work. (Image: solar panels image by MAXFX from Fotolia.com)

There are two ways to connect solar panels. You can either connect them in series or in parallel. This concept applies not only to solar panels but to batteries and other voltage sources as well. What's important is that you hook the voltage sources together in proper sequence.

Things You'll Need

  • 3 solar panels
  • Black wires
  • Red wires

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Locate the positive terminal and the negative terminal on each solar panel. Refer to your panels' instructions if you need help identifying which is which.

Take your black wire with your left hand and connect it to the negative terminal of solar panel No. 1. Take the other end of the black wire with your right hand and connect it to the negative terminal of solar panel No. 2.

Take your red wire with your left hand and connect it to the positive terminal of solar panel No. 1. Take the other end of the red wire with your right hand and connect it to the positive terminal of solar panel No. 2.

Connect the negative terminals of panels No. 2 and 3 with your second black wire.

Take your second red wire and connect the positive terminal of solar panel No. 2 to the positive terminal of solar panel No. 3.

Tips & Warnings

  • Mark the wires, if they are black, by painting red marks on one wire to denote positive and use it only on positive terminals. Use the other wire only on negative terminals.

References

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