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How to Wire Solar Panels in Series

There are three ways to wire a solar panel array; series, parallel, and series-parallel. This blog post is not going to cover when to use which one, but this blog post will show you, once you’ve made that decision, how to wire your solar panels in a series array.

Wiring solar panels in series simply means that you are going to connect the positive wire from one solar panel to the neighboring solar panel. The remaining positive and negative wires on the ends of the array will then be connected to the charge controller.

Here is a video that will guide you through this process and below the video, I have several examples of how to wire two to six solar panels in series.

How to Wire Solar Panels in Series Video

How to Wire Two Solar Panels in Series

How to Wire Three Solar Panels in Series

How to Wire Four Solar Panels in Series

How to Wire Five Solar Panels in Series

How to Wire Six Solar Panels in Series


Monday 31st of January 2022

What's the max solar panels I can connect in series to a 40a mppt? I live in Arizona.


Saturday 18th of December 2021

Is it better to have a 100 foot cable from the panels (DC) to the inverter or from the inverter (AC) to the load?


Monday 26th of July 2021

i wish you would go over the size of wiring to use on the various applications of solar systems. thanks


Saturday 17th of April 2021

Hi Nate. Great DIY info. Thanks. Question which is the best in line circuit breaker to use on the following? I get confused on the breakers I see being used rated at 12 to 24 volts. I have 2 x 330 watt solar panels in series with a Vmp of 34.6 volts Voc of 41.0 volts Imp of 9.55 Amps Isc 10.33 Amps max input to my solar controller generator is 700 watts, max current of 12 Amps, with a DC Voltage of 35 to 150 Volts

Mario Traina

Friday 26th of March 2021

Greetings. I've watched your video on connecting two solar panels in series, but I'm wondering if there's anything I need to know in doing this with a Renogy 200W Suitcase system? The rear of the panels have the little junction boxes connecting them in parallel from the factory, which then go into an MPPT charge controller. The reason for me wanting to this, is that I cannot get enough voltage to charge my Bluetti AC200 Power Station. It was suggested however, that if I change the configuration to Series, I should get double (24V) enough to get something into the Bluetti. I would also like a simple MC-4 connection solution so that I can switch back to the original configuration when wanting to charge my 12V RV battery for instance. Can you recommend which parts I would need to accomplish this please? Ever so grateful... Cheers