PWM controller

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question

djibi asked Dec 25, '18

How to you do to size correctly a PWM controller nominal current ?

Thanks

BlueSolar PWM

2 |3000

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Answer 1 · 2018-12-25T10:11:29Z

markus answered · Dec 25, 2018 at 10:11 AM

Panel Isc (short circuit current) must not exceed PWM controllers rated current.

To be safe, give 20% margin.

10

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

djibi commented · Dec 25, 2018 at 10:19 AM

but if Impp excide the rated current what will happen?

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markus ♦♦ djibi commented · Dec 25, 2018 at 10:21 AM

Panel Impp should be lower than Panel Isc. If you exceed the Amps, it will likely damage your PWM.

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djibi markus ♦♦ commented · Dec 25, 2018 at 11:58 AM

and exemple I have a solar panel with Immp=8.29A and Isc=8.89A

Can I use a PWM of 10A?

for me no because : Icontroller = 1.25*8.29=10,69A is more than the 10A of rated current.

Am I right or can I accept? Or my formule of calculation is wrong?

PS:Sorry for my bad english

THANKS

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