PV panel connection

[Fang2F]

Hi

I am a new to this forum. I have a small project.

In my system have 12 panel.

I have 2 diagrams, what different between 2 diagrams? what should i choose?

Thanks everyone!
PV.png

[ButchDeal]

The second one makes no since. Modules do not have 4 connections on them. What I think you are trying to draw is 3 sets of paralleled modules then put into series.
so first is 2P3S and second would (I guess) be 3S2P

[SunEagle]

Diagram 1 wiring results in a circuit of 108VDC and 16Amp.

Diagram 2 does not make any sense and IMO only Diagram 1 will result in 108VDC & 16 amp.

What is your plan to use your 12 panels? Is it going to be a "grid tie" or "off grid" system?

[Fang2F]

Thank you, ButchDeal,
oh, i'm sorry , in diagram 2, I mean:

PV4.bmp


and what shoud I choose?

Thanks!

[ButchDeal]

yeah this doesn't help much. it is showing an odd parallel/ parallel configuration of
3P2P which makes little since.
I think what you want is diagram 1 but it really depends on your CC.

[Fang2F]

Diagram 1 wiring results in a circuit of 108VDC and 16Amp.

Diagram 2 does not make any sense and IMO only Diagram 1 will result in 108VDC & 16 amp.

What is your plan to use your 12 panels? Is it going to be a "grid tie" or "off grid" system?

My system use off grid ( I'm using in island.). PV panel on two side of the roof, thus I want to make sure that my system run normally. i'm confusing between diagram 1 or diagram 2

[SunEagle]

Thank you, ButchDeal,
oh, i'm sorry , in diagram 2, I mean:
[ATTACH=CONFIG]n333640[/ATTACH]



and what shoud I choose?

Thanks!

Diagram 2 shows all 6 panels wired in parallel (all of the + & - wiring of each panel is common to each other) which will result in 36VDC & 48 Amps going to the inverter.

Again depending on how you plan to use your panels (grid tie / off grid) may determine what is the best way to wire them.

If the system is an off grid, the wiring will depend on the specs of the charge controller.

If the system is a grid tie, the wiring will depend on the inverter specs.

[SunEagle]

My system use off grid ( I'm using in island.). PV panel on two side of the roof, thus I want to make sure that my system run normally. i'm confusing between diagram 1 or diagram 2

If your system is off grid then what is the make and model of your Charge controller and how is your battery system wired?

[bcroe]

Your first Diagram 2 would work. But it is generally harder to wire with standard hardware, and doesn't allow convenient
placement of fuses (some say they aren't needed here). I think it would be harder to debug, needing 3 way wire junctions
out on the array, with possibly different gauge wires to control voltage drop. I don't see any advantage.

The later Diagram 2 is just a complete parallel circuit putting out 36V, not what you want. Bruce Roe