How to charge battery with Buck Converter in a solar system?

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Mohammed Bilal Danoune

Dear David,

Yes, the relationship is valid but the temperature effects on Vin of the solar panel. Therefore, the duty cycle would be changing.

And you need to put a blocking diode in output side of the converter.

Good luck.

Tony Maine

Just make the MPPT maximise the charge current. That is all you need to do. It will set the duty cycle to the correct value.