How To Connect RV Solar Panels - Parallel vs Series - MPPT vs PWM

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When connecting multiple RV solar panels, is it better to connect the panels in series or parallel? Which configuration will give you the most power? Do I need an MPPT solar charge controller? I get these questions a lot so I'll do a little demonstration to show what happens when I wire my solar panels both in series and parallel.

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MORE TIPS FOR CONNECTING SOLAR PANELS
If you have an MPPT charge controller and closely matched panels, then wiring them in series or parallel should yield the same result. Watch the experiment in the video for a demonstration of this.

If you have a PWM charge controller, it will be better to wire your solar panels in parallel keeping in mind you may need thicker cable.

Finally, if you have mismatched panels, using an MPPT charge controller and wiring your panels in series will give you the best result.

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This video may also address these topics:
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Can you connect different size solar panels?

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