diy solar

diy solar

How can I wire these 4 series strings to my 6000XP?

W

wired1

New Member
Joined
May 30, 2021
Messages
166
Location
New Hampshire and Bahamas
I finally have my panels! I want to utilize 4 series strings of 5 panels each facing different directions, and there's only 2 MPPT inputs on the 6000XP. My cottage is an Octagon

How can I do this? Do I need to buy more MPPT's, to keep them from bringing the power down on the other strings? Roof pitch and Latitude are both 25 degrees.

Solar Octagon.JPG
 
Yes, connect 5 panels with 5 panels in parallel two time.
That will give 19.5A per MPPT input and they are rated for 17A, but it's not a huge problem.
It's call over-paneling, but that only happen based on 9.77 amps of the STC spec.
Based on the more realistic NOCT spec, this 9.77A is only 7.33A, so 14.66A when 2 five panels are in parallel.
 
chrisski said:
If voltage requirements are met and amperage not exceeded, will a combiner work? Perhaps 5s2p to each MPPT?

At my house I have two SCCs with panels set up 3s4p with a minute solar combined.

On my RV build I used this midnitesolar combiner to add up to 6 parallel strings

Click to expand...


I'm not sure why, but I was under the impression that when I joined the strings, the one putting out the least current would drag the other string down?

Can you recommend a combiner box that would be right for this?

Also, could I add more panels (I have 30), facing any way, and just run them into the same combiner box?
 
yabert said:
Yes, connect 5 panels with 5 panels in parallel two time.
That will give 19.5A per MPPT input and they are rated for 17A, but it's not a huge problem.
It's call over-paneling, but that only happen based on 9.77 amps of the STC spec.
Based on the more realistic NOCT spec, this 9.77A is only 7.33A, so 14.66A when 2 five panels are in parallel.
Click to expand...
I'm guessing I need a combiner box to do this right?

Any recommendations on whose would be a good choice?
 
yabert said:
Right, or MC4 parallel connector.

By the way, your four 12V battery in serie isn't ideal.
If you can, buy a/few 48V battery.
Click to expand...

If I had the $$, I would have lots of 48 Volt batteries :) I spent more on those batteries than I would've on 2 100 amp 48 V server rack types :(
My Dad used to say "Too soon old, Too late smart" He was right.

So, all I need is to combine all 4 strings into the MC4 connectors then straight to the inverter inputs? Sounds too easy :)
And with separate strings running parallel, it doesn't matter if one string is shaded?
 
yabert said:
Well, 2 times 2 strings of 5 panels.


Exactly.
Click to expand...
OMG, I have been reading for days trying to find an answer. I can't thank you enough !!!!

Silly question I'm sure: Could I add more strings as well? I do have 10 extra panels and I could always buy a Ice machine to utilize the extra power.... Hmmmm
 
wired1 said:
OMG, I have been reading for days trying to find an answer. I can't thank you enough !!!!

Silly question I'm sure: Could I add more strings as well? I do have 10 extra panels and I could always buy a Ice machine to utilize the extra power.... Hmmmm
Click to expand...
Actually reading for Months!!!

Another silly question, I'm sure in many peeps eyes,

Which 2 series panels should I connect together in parallel?
 
wired1 said:
Silly question I'm sure: Could I add more strings as well? I do have 10 extra panels
Click to expand...
Sure, especially if they are not at the same orientation (east/south/west).
That way, you can expect to maximize the 17A input of the MPPTs as each string of 5 panels will give max amps when sun is right in front.
 
You must log in or register to reply here.

Similar threads

T
Parallel Strings with Optimizers
Replies
2
Views
263
teal95
T
K
Benefits of wiring an east/west array in parallel or series
Replies
4
Views
570
timselectric
T
B
Time to add Panels to 2 X 6000XP
2
Replies
21
Views
488
zanydroid
Z
W
How many series strings of batteries can I have in parallel.
Replies
11
Views
587
JRH
J
JBoffgrid2022
12kw Off Grid System EG4 6000XP Inverter
Replies
2
Views
717
Brettw
B
Back
Top