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Old 08-02-2019, 01:37 PM   #1
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Solar Panel Wiring

So I'm running into an issue wiring the panels. It's pretty self explanatory because the + & - leads can only plug in one way. But when I get to the end, the male and female connectors are the wrong colors. I can easily swith the wires going into the controller, but I'm not comfortable with red for Neg and black for Pos.
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Old 08-02-2019, 04:36 PM   #2
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I prefer not to impose roles on my wiring. Let them discover who they want to be, then be there for them no matter what. That's what unconditional love is all about.

Seriously though - are you saying you were supplied with pre-terminated wiring that was terminated incorrectly? If so, either send it back or swap the connectors.
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Old 08-02-2019, 05:29 PM   #3
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Originally Posted by TheHubbardBus View Post
I prefer not to impose roles on my wiring. Let them discover who they want to be, then be there for them no matter what. That's what unconditional love is all about.

Seriously though - are you saying you were supplied with pre-terminated wiring that was terminated incorrectly? If so, either send it back or swap the connectors.
This is where I ended up. I could rewire the ends, but can't find pins from anywhere but China. I can order some ends, but that 3 days before I get them. HD does not carry any solar panel accessories at all in store.
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Old 08-02-2019, 07:58 PM   #4
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https://www.amazon.com/s?k=mc-4+conn...b_sb_ss_i_1_13
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Old 08-03-2019, 08:42 AM   #5
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Cut those ends off and put the correct connectors on the correct color wire. Problem solved. If you have any other solar questions you I'm happy to help as I've recently been through a crash course in solar, battery banks, inverter and all the associated math. I have tables and formulas and all the goods. And remember not to overload your charge controller.

30amp can handle about 300 watts of panels in parallel at 12v. You can run multiple controllers on one battery bank to handle the charge load.
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Old 08-03-2019, 09:06 AM   #6
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So if you had only two panels and were paralleling them together, you wouldn't have this problem, right? Your terminals are switched because you're daisy-chaining the MC4s, which is not the way they were designed to be used.
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Old 08-03-2019, 09:22 AM   #7
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In these modern times, gender-bias has gone the way of the kerosene lantern.
Kinda quaint in it's simplicity, but irrelevant, except under dire survival situations...
Quote:
Originally Posted by TheHubbardBus View Post
I prefer not to impose roles on my wiring. Let them discover who they want to be, then be there for them no matter what. That's what unconditional love is all about.

Seriously though - are you saying you were supplied with pre-terminated wiring that was terminated incorrectly? If so, either send it back or swap the connectors.
As to voltage-bias, am I incorrect in presuming the PV panel's electrons only flow in one direction?
Not wanting to toss down the Race Card here, but wouldn't this necessitate switching the wires from where they connect to the panel?simpsons___evil_krunchy.jpeg
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Old 08-03-2019, 10:49 AM   #8
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As to voltage-bias, am I incorrect in presuming the PV panel's electrons only flow in one direction?
What this thread needs is an energetic discussion of random drift.

Or, another (very slightly) relevant Simpson's image (don't mean to ride your coattails, but you've got great taste)


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Old 08-03-2019, 11:01 AM   #9
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For that, let's consult with reknowned astrophysicist, Neil DeGrasse Tyson:
Quote:
Originally Posted by TheHubbardBus View Post
What this thread needs is an energetic discussion of random drift.

Or, another relevant Simpson's image (don't mean to ride your coattails, but you've got great taste)
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Old 08-03-2019, 11:08 AM   #10
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Or maybe even an irreverent image...simpsons___facepalm_doh.jpeg
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