Solar Panel Output

Another word for change is transform.-Er, give you an idea?

a transformer for DC?

Google "dc/dc converters". You should be able to find one that will get you pretty close to what you need. 2.5V is a pretty common output voltage for converters these days. 3.3V is even more common. A simple linear voltage regulator IC will get you from 3.3 to 2V.

Be sure you match the input range of the DC/DC converter to the output range of your solar panel, which I assume is not a constant 17V, but varies with the amount of sunlight that hits it.

Hello bhankiii,

Thank you very much for your valuable suggestions. It has helped me a lot.

I did consider DC/DC converters, however I could not find anything with 2V output and did not think about the linear voltage regulator IC.

So, now I have

A Solar Panel with Vmax = 17.82V, Imax = 570mA and Pmax =10W

If I implement a DC/DC converter of

Input Voltage Range = 9-18V, Current = 545mA and

Output Voltage = 5V and current = 1A, VCDE6-D12-S5

(http://www.v-infinity.com/pdffiles/VCDE6%20series.pdf)

So here I would need a linear voltage regulator IC to change the 5V to 2V. I have looked into this, however I am not hundred percent sure about the current issue.

I need 2V and 1A for the electrolyser (Fuel Cell) and I had 5V and 1A from the first DC-DC converter. How do I make sure that the linear voltage regulator IC outputs 1A.

I was looking at the following linear voltage regulator IC

(http://datasheet.sii-ic.com/en/voltage_regulator/S1172_E.pdf)

Your suggestion is very appriciated.

Best regards

Gyandeep

Many linear regulators will get your from 5 V to 2V. Use one that comes in the TO-3 package and connect it to large heatsink - you will need to dissipate (5-2)*1A = 3watts.

This is a substantial loss and I would recommend that you continue looking for a converter with a 3.3v output, which would give you only a 1.3W loss.

Here's one:

http://www.cui.com/pdffiles/PTK10%20series.pdf

Choose a linear regulator with a low dropout voltage - that's the minimum voltage above your output that it can operate at. You need one with a minimum dropout voltage of 3.3-2 = 1.3V. These are pretty easy to find. Get one that can output at least 2A so you don't overstress it. The fuel cell will limit the current to 1A.

Bhankiii,

A linear voltage regulator can make a lot of Voltage disappear but does nothing for the feeble current. The 0.258Amps will still be the same. He needs 4 times the current than the panel can provide.

Jon

17V @ 0.258A = 4.4w. Assuming 75% efficiency, a 3.3V dc/dc will get you .997 A.

You need a switching step-down converter. I'm afraid you will not find an out-of-box solution but it's rather simple to design one and it can be built from about a dozen of components.

charge 2 sets of lead acid battery , alternately and take out power in DC 2 volt from one when the other one is getting charged.