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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

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RogerT

Wednesday 27th of April 2022

Can I wire one string in series and one string in parallel to a combiner box then to my inverter? My inverter manual shows that the best set up to get my max out of the unit is to wire 8 panels in series and 2 in parallel. That is 2 different strings but I don't know how to combine them?

Nate Yarbrough

Sunday 15th of May 2022

How to wire solar panels in series-parallel: https://youtu.be/b2H8vpj8rQg

Rick

Saturday 23rd of April 2022

There is definitely alot to learn when it comes to hooking up your own solar system..... amps volts watts ect ect ect..... the solar wire diagrams make all the difference when it comes to the solar way of life...... ive noticed no one else has done that and thats were i was stuck..... what would us beginner's do without the help of pros like you.... very helpful thank you..... oil companies watch out.....

Roger t

Thursday 21st of April 2022

In my comment below the 27 amps is max input amps to the inverter not output.😁

Roger t

Thursday 21st of April 2022

I have a lvx6048 6000kw 450v solar input max out at 27amps. I have 10 395 watt panel 39.1 watts and 10.2 amps. Is there a way to wire these to be able max out my unit?

Sean

Saturday 2nd of April 2022

I have 4x250w panels and 4x260 panels can I use all 8 panels ? Which would be my best configuration ? And what size victron controller would I need ? And I have 4 x130AH leisure batteries all same make ,and new could I use all 4? Or just 2 in series 24v ? Thank you newbie here