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HELP! need help quick!

Jamie.sanders

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Dec 1, 2019
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So I am planning on driving to signature solar in Texas tomorrow and picking up 10 of the Solarever 440 watt panels.
I am new to this and realize I don’t know what I don’t know.
Is there any reason this won’t work with Will’s 4,000 watt 24 volt solar blueprint!
It uses 2 40a mppt controllers!
Just don’t want buy something I can’t use.
Any help would be greatly appreciated.
Specs to panels and controllers in pics.
 

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do you have a link to this "blueprint" I'm not up to speed with this Will stuff.

The 2nd pic has such a bad resolution it is unreadable on my 1920x1080 monitor.
 
4215BN controllers have a max voc input of 150 (138 @ 25c)

How are you planning to configure the pv arrary?
Thanks is exactly what i'm talking about, I understand there is 2 ways to wire them, I will be using 9 of the panels,
just not sure if they can be wired to work with VOC?
 
Epever state over panelling is acceptable 1.5x the charge current of their controllers (watts not volts)

wiring 2s2p per controller is 1760w/99.24v (@ 25c) which leaves lots of head room for cold mornings
 
thank you, So that means they will work correct?
i'm watching vids right now trying to figure this out.
 
I have learned that stringing 3 in series gives me 148.86 just under the 150 VOC rating
with 1320 watts which is well under the 2,000 watt capability of the charge controller.
 
I think the (2) charge controllers are a mismatch for the panels.

Those panels have a high VoC (50) so you would basically need to limit any series string to two panels.
3 panels in series will fry the SCC especially when it gets colder (than the 77F STC rating)
the colder it gets the higher the volts a panel will produce
(although stats say 150v - think 145 is the recommended max)

EDIT: the following is gibberish that leaked out of my brain and is incorrect

with only 2 SCCs you're limited to 2s2p or four panels
10 panels in a 2s5p configuration would require 5 SCC
basically one SCC for each pair of panels

for the cost of 5 SCCs you should be able to upgrade to a much better SCC with a much higher Voltage input
Victron comes to mind.
 
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Epever state over panelling is acceptable 1.5x the charge current of their controllers (watts not volts)

wiring 2s2p per controller is 1760w/99.24v (@ 25c) which leaves lots of head room for cold mornings
so with this configuration (2s2p), I will only be using 8 panels correct?
 
I think the (2) charge controllers are a mismatch for the panels.

Those panels have a high VoC (50) so you would basically need to limit any series string to two panels.
3 panels in series will fry the SCC especially when it gets colder (than the 77F STC rating)
the colder it gets the higher the volts a panel will produce
(although stats say 150v - think 145 is the recommended max)

with only 2 SCCs you're limited to 2s2p or four panels
10 panels in a 2s5p configuration would require 5 SCC
basically one SCC for each pair of panels

for the cost of 5 SCCs you should be able to upgrade to a much better SCC with a much higher Voltage input
Victron comes to mind.
do you have recommendation on the Victron? sorry for all the questions, I'm new and learning.
 
I think the (2) charge controllers are a mismatch for the panels.

Those panels have a high VoC (50) so you would basically need to limit any series string to two panels.
3 panels in series will fry the SCC especially when it gets colder (than the 77F STC rating)
the colder it gets the higher the volts a panel will produce
(although stats say 150v - think 145 is the recommended max)

with only 2 SCCs you're limited to 2s2p or four panels
10 panels in a 2s5p configuration would require 5 SCC
basically one SCC for each pair of panels

for the cost of 5 SCCs you should be able to upgrade to a much better SCC with a much higher Voltage input
Victron comes to mind.
I dont think your math is right.
2s2p is 4 panels correct? so 4 panels per charge controller. or 8 panels for 2 charge controllers, or 12 panels for 3 charge controllers
I am only getting 10 panels, I don't see how I would need 5 charge controllers.

couldn't I just do 2 sets of 2s2p, using only 8 panels and be OK?
sorry, I'm learning.
 
I dont think your math is right.
2s2p is 4 panels correct? so 4 panels per charge controller. or 8 panels for 2 charge controllers, or 12 panels for 3 charge controllers
I am only getting 10 panels, I don't see how I would need 5 charge controllers.

couldn't I just do 2 sets of 2s2p, using only 8 panels and be OK?
sorry, I'm learning.
My bad
I got mixed up somehow, I'm deep in my own thoughts about what I'm doing and it leaked out here.
..and I'm still learning, so no sorry about it, you caught my goof and you're right.

Yes, 2s2p IS 4 panels so you would use a total of 8 panels with the 2 SCCs.
You're well set with the SCCs you plan on using
 
My bad
I got mixed up somehow, I'm deep in my own thoughts about what I'm doing and it leaked out here.
..and I'm still learning, so no sorry about it, you caught my goof and you're right.

Yes, 2s2p IS 4 panels so you would use a total of 8 panels with the 2 SCCs.
You're well set with the SCCs you plan on using
Ok thanks, I don’t want to blow up… again.
 
There's no harm in getting a 3rd controller to use the other 2 panels if you've got money to burn.

138v is the recommended max at 25c, 150v at the minimum operating temp
see manual https://tinyurl.com/4215bn

you can also use this table to calculate the pv voltage increase on cold winter mornings
PV-Voltage-correction-factors.png
 
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