Solar Panel Wiring

[somewhereinusa]

Originally Posted by nanoplane

So in my configuration, I have 20 100W panels is a series / parallel relationship driving two charge controllers (4 sets of 3 panels in parallel and 4 sets of 2 panels in parallel.. More complicated but is provides up to 37V driving the charge controllers and evenly divides the supply between them) This drives a parallel connected set of 4 AGM 200AH 12 V batteries .

Why I did it this way:


Basic schematic is below:





Drawing matches the roof configuration here:



Wiring and layout here:

I don't seem to see a schematic anywhere. Is it a pdf?

[gs1949]

I got it before, but the link seems broken now. I'll find it.


[edit] maybe I just looked at it, can't find it.


[another edit] I just got it again, by right clicking on the broken icon thingie that appears under "... below"


then I hit copy image on the menu that came up and saved it to a file.



Now I should say I run FireFox on Linux Mint and have no idea if this will work on any non-Linux systems, especially windows.

[CMORGANSKOOL]

Originally Posted by o1marc

So I would run the 3 lefts in series and the 3 rights in series and parallel the 2 runs, or vice versa?

According to the spec sheet you cannot exceed 60 amps or it will trigger the short circuit switch in the controller.

if each side is 36v at 8.3 amps and you wire them in parallel to the controller you have 16.6 amps in and when it's converted to 12 is about 50 amps which is in spec but on the high end of the rating.

So yes the two strings of 3 in series wired in parallel to the controller should be ok.

[o1marc]

Well it seems to be working. I have only the fridge going. Last night inverter was showing 12.4v. 24hrs later I went to work on the bus and saw it was at 12.1 and the fan was running. Fan shut off after a minute and after working for an hour the batteries were at 12.3. I have yet to see the direct sun on my panels. Bus sity up against a wooded area that shades the sun.

[CMORGANSKOOL]

We’re you looking for one of these?
I got the book.

[CMORGANSKOOL]

Bulb replacement chart

[kazetsukai]

Originally Posted by o1marc

Well it seems to be working. I have only the fridge going. Last night inverter was showing 12.4v. 24hrs later I went to work on the bus and saw it was at 12.1 and the fan was running. Fan shut off after a minute and after working for an hour the batteries were at 12.3. I have yet to see the direct sun on my panels. Bus sity up against a wooded area that shades the sun.

Have you measured the draw/energy usage of the inverter/fridge?

[nanoplane]

Originally Posted by somewhereinusa

I don't seem to see a schematic anywhere. Is it a pdf?

Yes, It's a PDF. Note, I think you need to be logged in to see it..

[gs1949]

I just downloaded this schematic again. I retitled it this time so I know at a glance where it came from.

But for some reason my browser, which is Firefox on Linux Mint 19, thinks this is an image rather that a pdf. So I just right click, and then left click on save image in the menu that comes up, and then it saves the pdf.

But I quit using windows a little over 10 years ago, so I can't give much advice on using windows, but this might work, especially with FireFox.