I have a solar panel . I am going to build a shunt regulator as the charger for the battery.

The solar panel puts out about .6 amps 24VDC open circuit.

I have read that I should use Schottky diode because of it's low forward volatage.


On hand I have a 1n5820, 1n5818 and a 1n5817


Looks like the 817 has the lowest forward voltage and is 1 amp.


Just wanted to check if this was a good choice or use one of the other diodes I have on hand or just order something else.

 

If you want less of a voltage drop, use an ideal diode circuit.

[ed]
This circuit handles up to 2a with a .05v voltage drop.
http://www.discovercircuits.com/DJ-Circuits/ideal-diode.htm
[/ed]

 

If you want less of a voltage drop, use an ideal diode circuit.

[ed]
This circuit handles up to 2a with a .05v voltage drop.
http://www.discovercircuits.com/DJ-Circuits/ideal-diode.htm
[/ed]

Thanks for the quick response.

Yeah I ran across those before

This is a work in progress. For my first version I want to keep things as simple as possible. I'm planning on adding improvements later.

What do you think about what I have on hand?

 

With what you have, I would use the 5817.

When you start to expand, those extra volts add up though.