How can I get 5V out of my 15Vmp, 400mA, 6W solar panel?

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makiyang614
Posts: 3
Joined: 07 Jun 2017 07:16

How can I get 5V out of my 15Vmp, 400mA, 6W solar panel?

#1 Post by makiyang614 » 12 Jun 2017 11:50

What I thought would be a simple project is driving me nuts!
I'm trying to use a 6W 400mA solar panel to charge a portable usb battery charger for phones.
I'm using an LM2576T adjustable buck regulator. But whenever it's connected to the panel the panels voltage drops to 4-4.5 volts regardless of the duty cycle of the regulator.
I read that solar panels don't like having square waves pulled out of them so I tried arbitrarily large capacitances on the input but still nothing!!
What am I missing?
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hexreader
Posts: 1786
Joined: 27 Jun 2010 12:07
Location: England

Re: How can I get 5V out of my 15Vmp, 400mA, 6W solar panel?

#2 Post by hexreader » 19 Jun 2017 11:15

This forum is for MikroElektronika products, not for general electronics.

You would be much better off here....
http://www.edaboard.com
Start every day with a smile...... (get it over with) :)
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