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Parallel vs Series Panel configuration - how are calculations correct in video?

2manyquestions

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Jul 22, 2021
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Hello, everyone.

My understanding of wiring panels in series was that the voltages are additive while the watts stay the same, while if they are wired in parallel, voltage stays the same and wattage is additive.

In Will's video linked below, at the 3:45 mark, he adds both volts and watts for 3 panels wired in series (each panel is 45VOC and 350W) and he gets 135VOC and 1050W:


About one minute later, he does the same thing with 4 panels in series (voltage and wattage are additive again).

Can someone explain how and why he added volts and watts for these examples?

I am very confused now.

I am asking because I have 4 panels, 255W and 37.5VOC each, and wanted to connect them as 2S2P for 510W and 75VOC.

Thank you!
 
Last edited:
with series connections volts are additive and amps stay the same.
Watts = amps * volts
 
with series connections volts are additive and amps stay the same.
Watts = amps * volts
Holy hell, I had that in my notes too. I mixed up watts and amps (insert slapping my forehead here), I should just go to bed.

Mods, please feel free to delete this thread.
 
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