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How Series Vs Parallel Wired Solar Panels Affects Amps & Volts

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How Series Vs Parallel Wired Solar Panels Affects Amps & Volts

The amps and volts of a solar panel array can be affected by how the individual solar panels are wired together. This blog post is going to teach you how the wiring of a solar panel array affects it’s voltage and amperage. The key takeaway to know is that ‘Solar Panels in Series Adds their volts together’ and ‘Solar Panels wired in Parallel adds their amps together.’

Tutorial Video:

Solar Array Volts & Amps Wiring Diagrams:

This diagram shows two, 5 amp, 20 volt panels wired in series. Since series wired solar panels get their voltages added while their amps stay the same, we add 20V + 20V to show the total array voltage and leave the amps alone at 5A. There is 5 Amps at 40 Volts coming into the solar charge controller.

This diagram shows three, 4 amp, 24-volt panels wired in series. Since series wired solar panels get their voltages added while their amps stay the same, we add 24V + 24V + 24V to show the total array voltage of 72 Volts while the Amps remain at 4 Amps. This means there are 4 Amps at 72 Volts coming into the solar charge controller.

This diagram shows Four, 6 amp, 18-volt panels wired in series. Since series wired solar panels get their voltages added while their amps stay the same, we add 18V + 18V + 18V + 18V to show the total array voltage of 72 Volts while the Amps remain at 6 Amps. This means there are 6 Amps at 72 Volts coming into the solar charge controller.

This diagram shows five, 5 amp, 20-volt panels wired in series. Since series wired solar panels get their voltages added while their amps stay the same, we add 20V + 20V + 20V + 20V + 20V to show the total array voltage of 100 Volts while the Amps remain at 5 Amps. This means there are 5 Amps at 100 Volts coming into the solar charge controller.

This diagram shows six, 8 amp, 23-volt panels wired in series. Since series wired solar panels get their voltages added while their amps stay the same, we add 23V + 23V + 23V + 23V + 23V + 23V to show the total array voltage of 138 Volts while the Amps remain at 8 Amps. This means there are 8 Amps at 138 Volts coming into the solar charge controller.

This diagram shows two, 8 amp, 23-volt panels wired in parallel. Since parallel wired solar panels get their amps added while their volts stay the same, we add 8A + 8A to show the total array amps of 16 Amps while the Volts remain at 23 Volts. This means there are 16 Amps at 23 Volts coming into the solar charge controller.

This diagram shows three, 6 amp, 18-volt panels wired in parallel. Since parallel wired solar panels get their amps added while their volts stay the same, we add 6A + 6A + 6A to show the total array amps of 18 Amps while the Volts remain at 18 Volts. This means there are 18 Amps at 18 Volts coming into the solar charge controller.

The above diagram shows four, 5 amp, 20-volt panels wired in parallel. Since parallel wired solar panels get their amps added while their volts stay the same, we add 5A + 5A + 5A + 5A to show the total array amps of 20 Amps while the Volts remain at 20 Volts. This means there are 20 Amps at 20 Volts coming into the solar charge controller.

The above diagram shows five, 9 amp, 18-volt panels wired in parallel. Since parallel wired solar panels get their amps added while their volts stay the same, we add 9A + 9A + 9A + 9A + 9A to show the total array amps of 45 Amps while the Volts remain at 18 Volts. This means there are 45 Amps at 18 Volts coming into the solar charge controller.

The above diagram shows a four-panel array using 5 Amp, 20 Volt panels wired in a series-parallel configuration of 2-panel series strings wired in parallel (2s2p). First, we need to find the volts and amps of the series wired strings of solar panels. Since solar panels wired in series add their voltages together while the amps stay the same, we add 20V + 20V. This means that each series string in this series-parallel configuration is 5 Amps at 40 Volts. Since the two 5A – 40V series strings are then wired in parallel, we add the amps while not changing the volts because parallel wired solar panels (or series strings) get their amps added while their volts remain the same. Adding 5A + 5A from the series strings and leaving the volts the same as the series wired strings gives us an array of 10 Amps at 40 Volts.

The above diagram shows a six-panel array using 5 Amp, 20 Volt panels wired in a series-parallel configuration of 3-panel series strings wired in parallel (3s2p). First, we need to find the volts and amps of the series wired strings of solar panels. Since solar panels wired in series add their voltages together while the amps stay the same, we add 20V + 20V + 20V. This means that each series string in this series-parallel configuration is 5 Amps at 60 Volts. Since the two 5A – 60V series strings are then wired in parallel, we add the amps while not changing the volts because parallel wired solar panels (or series strings) get their amps added while their volts remain the same. Adding 5A + 5A from the series strings and leaving the volts the same as the series wired strings gives us an array of 10 Amps at 60 Volts.

The above diagram shows a six-panel array using 8 Amp, 23 Volt panels wired in a series-parallel configuration of 2-panel series strings wired in parallel (2s3p). First, we need to find the volts and amps of the series wired strings of solar panels. Since solar panels wired in series add their voltages together while the amps stay the same, we add 23V + 23V. This means that each series string in this series-parallel configuration is 8 Amps at 46 Volts. Since the three 8A – 46V series strings are then wired in parallel, we add the amps while not changing the volts because parallel wired solar panels (or series strings) get their amps added while their volts remain the same. Adding 8A + 8A + 8A from the series strings and leaving the volts the same as the series wired strings gives us an array of 24 Amps at 46 Volts.

The above diagram shows an eight-panel array using 5 Amp, 20 Volt panels wired in a series-parallel configuration of 4-panel series strings wired in parallel (4s2p). First, we need to find the volts and amps of the series wired strings of solar panels. Since solar panels wired in series add their voltages together while the amps stay the same, we add 20V + 20V + 20V + 20V. This means that each series string in this series-parallel configuration is 5 Amps at 80 Volts. Since the two 5A – 80V series strings are then wired in parallel, we add the amps while not changing the volts because parallel wired solar panels (or series strings) get their amps added while their volts remain the same. Adding 5A + 5A from the series strings and leaving the volts the same as the series wired strings gives us an array of 10 Amps at 80 Volts.

Check your Comprehension

Here is a quiz you can take to check yourself and see if you understand this blog post:

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Michael Jordan

Wednesday 5th of May 2021

I have 24 panels and trying to get the best way to hook them up to charge my 5k growatt spf5000es

Ted Anderson

Tuesday 27th of April 2021

I have a 16 panel setup. What is the best way to wire in parallel? Are there connectors that can be used to wire pos. to pos.?

thanks, ted

Nate Yarbrough

Wednesday 28th of April 2021

I would strongly advise against wiring 16 panels in parallel. You will be much better off with some kind of series-parallel configuration.

Michael

Wednesday 31st of March 2021

Your organization of videos is brilliant. Thank you for the quiz. Definitely helped clarify everything learned.

Jim

Thursday 18th of February 2021

Hello Nate, I am going to use the 2s3p set up for my Growatt solar generator. Your series is great. Did I catch a typo on the graphic? Shouldn't the voltage be 69 volts?

Bart McGough

Sunday 14th of February 2021

I am glad I found your series on Solar information. It takes the guess work out of what I am trying to put together. Great job!!! Love the Question/Answer part.

Nate Yarbrough

Tuesday 16th of February 2021

Aweosome! Glad it helped!