How do I wire this solar panel? (OGRE B180-J24)

[FishFilet]

This open circuit voltage is 40.6 and a little different than you mentioned earlier. More closely matches pin 1 and 4. I'm not sure where to wire and this is different than the panels I looked at.

That's an older version but thank you.

[chrisski]

I am curious about the unlabeled pins, I’ll call them 0 and 5. Don’t now if you have something like this, but I have a smaller 50 ah lithium, homemade solar generator which has a MPPT I could hook a panel. I’d see how it did after a day of charging on pin 1 and 4.

Have you tried contacting the OGRE company? They seem to market themselves for stand alone panels to power a small battery pack off grid.

[bcroe]

I think you should connect to the highest voltage points, bracketing all the
bypass diodes, 1 & 4. Bruce Roe

[chrisski]

This open circuit voltage is 40.6 and a little different than you mentioned earlier. More closely matches pin 1 and 4. I'm not sure where to wire and this is different than the panels I looked at.

Ogre Panels.jpg

[FishFilet]

I have several OGRE B180-J24 solar panels that don't seem to be working well at all. I found a data sheet for them and it seems to indicate that they should be hooked up at the points I have labeled 2 and 3 as they are marked with a negative and positive in the diagram.

B180-J24.png

This is a 24v panel and the data sheet says the open circuit voltage should be 44v. I get the following with a multimeter.

• 40v on points 1 & 4
• 24v on 1 & 3
• 24v on 2 & 4
• 12v on 2 & 3

There are diodes between points 1&2, 2&3, 3&4.

The data sheet seems to indicate that I should hook up to points 2 & 3 but measuring the voltage across the points makes me thing I should use points 1 & 4.

Here is a link to the data sheet. What do you think?