Does anyone know if MC4 connectors are waterproof when they're NOT plugged in?

Put up my panels yesterday but have to wait for some cable extensions to wire everything up so the plugs are out and exposed to the elements. Are they safe? Or are they only waterproof when connected to each other?

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πŸ‘€︎ u/NothinButNoodles
πŸ“…︎ Oct 24 2021
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Mc4 branch connector to solar charge controller question.

Im following along with Will's 400 watt system with alernator charging. Link and he mentions that the branch connector is rated for 30 amps but the mc4 cinnectors are not. However at the end of the branch connector he recomends theres an mc4 connector. Should i just cut the mc4 off and connect it to 10 gauge wire going to the controller? This could be a dumb question but im a little confused. Thanks, yall!

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πŸ‘€︎ u/FearlessChair
πŸ“…︎ Jul 25 2021
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I'm an idiot, can you disconnect this mc4 connector?
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πŸ‘€︎ u/epicget
πŸ“…︎ Jul 12 2021
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MC4 connectors that are easy to disconnect by hand

I have a 200W Renogy suitcase as I wanted to keep it portable and versatile for RV or if I just go car camping. It comes with the controller attached and disconnects between panels and battery cables to make it easy to store and tote around.

The MC4 connectors are very easy to disconnect by hand, they seem to have a bit more space to get your thumb and forefinger in there. I bought some MC4 connectors off Amazon and replaced the battery side with 12 AWG and a 20 foot cable to connect to my RV but these new ones require the use of the tool to remove.

I would like to find the brand Renogy is using or I have seen videos of ones that have built in tabs you can squeeze to make them easy to remove for this type of application.

Anyone know of some?

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πŸ‘€︎ u/cking22001
πŸ“…︎ Aug 24 2021
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MC4 connector stuck

Hey van life! Need some solar / electrical help. I have an Ecoflow solar panel and some WindyNation solar extension cables I bought off Amazon. The WindyNation MC4 negative female connector is apparently pretty crappy, because I cannot disconnect it from the solar panel MC4 after connecting them. I got the MC4 tool and am able to push the prongs in, but no amount of tugging will separate the connectors. Anybody have any recommendations for prying it apart? Is my only option to cut the wire and reconnect a different MC4 onto the solar panel? Anybody have any recommendations for not-shitty MC4 cables that will disconnect somewhat easily? I want to be able to remove my solar from my van and use it for other things if needed.

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πŸ“…︎ Aug 25 2021
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For the bicycle enthusiasts go are building out a van, a 15mm cone wrench really helps with a stubborn MC4 solar connector!
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πŸ‘€︎ u/twowheels
πŸ“…︎ Mar 01 2021
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MC4 Branch Connector Lower PV output?

If I have a M/FFF and F/MMM MC4 Branches but don't use 1 of the 3 (ie. only M/FF and F/MM are used) will that lower my PV output?

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πŸ‘€︎ u/Cronenberg_Rick
πŸ“…︎ May 02 2021
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No Y-branch MC4 connector for a parallel panel connection

I have to connect my two 250W 24V panels in parallel to charge my two 12V batteries (in parallel) via an MPPT solar charge controller.

First of all, does this make sense? I mean am i doing it right? lol newb here, obv.

Second, i don't have y-branch mc4 connectors. I only have single ones. Can I hard wire the panels in parallel using only single MC4 connectors. I find this hard to explain so I am attaching an illustration that i hope would help. Thanks!

https://preview.redd.it/5aytkvft4rg61.jpg?width=2976&format=pjpg&auto=webp&s=9c753362860fe58c6570137151fbaaf533a88d1a

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πŸ“…︎ Feb 11 2021
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MC4 connector panel mount?

Is there such a thing as a panel mount connector for an MC4 fitting? Or, should I just be using something like the Renogy Cable Entry Housing and route a couple of shorter cables with MC4 connectors outside my battery box?

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πŸ‘€︎ u/Kardolf
πŸ“…︎ Feb 25 2020
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What are people’s opinions on installing panels in wet weather? How bad is it to trap moisture in an MC4 connector?

There seems to be fairly differing opinions on this among my crew. I’m curious if anyone has some solid evidence they can point to of wet MC4s failing at significantly faster rates than those installed dry.

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πŸ‘€︎ u/ship_tit
πŸ“…︎ Oct 09 2020
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Will an A03B crimp tool work for MC4 connectors?

Title says it all.

They are very similar looking judging by pictures online of the MC4 crimp head, and I am making purchasing decisions to set myself up to be able to work with solar setups in proper. If I could avoid spending money on a brand new tool in lieu of using an old one, I'd very much prefer to.

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πŸ‘€︎ u/ONEOFHAM
πŸ“…︎ Jan 19 2020
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Using Mc4 and amphenol connectors together

I was trained that you should never ever use the mc4 and amphenol together. I thought that was standard but I've recently met some solar professionals that see no problem plugging them into each other. I tried to find an article to back up my concerns but was surprised that I couldn't find anything. What do you all think and do you have anything to base that argument on?

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πŸ‘€︎ u/Harvey_Rabbit
πŸ“…︎ May 31 2019
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πŸ”Œ DIY: Make MC4 Connector Solar Cables πŸ”§ youtu.be/j-Ns16w3z_E
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πŸ‘€︎ u/stbernardacres
πŸ“…︎ Oct 07 2019
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Can a 12 gauge mc4 connector on a panel connect to a 10 gauge mc4 connector extension cable?

Handy bob uses 6 gauge wire from his panels to his CC, to limit voltage drop. So, how do you accomplish this with mc4 connectors? I'm going to have 5 100 watt panels in series.

Can a 12 gauge mc4 connector on a panel connect to a 10 gauge mc4 connector extension cable? Do mc4 connectors in lower than 10 gauge exist? Thank you.

https://handybobsolar.wordpress.com/the-rv-battery-charging-puzzle-2/

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πŸ‘€︎ u/WageSlaveEscapist
πŸ“…︎ Jun 24 2017
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US $8.73 35% OFF|Mictuning MC4 Connector Solar Panel Adapter Cable to DC 5.5mm x 2.1mm Universal MC4 Charge Adapter for All Power Solar Panel -in Wire from Automobiles & Motorcycles on Aliexpress.com βœ… s.click.aliexpress.com/e/…
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πŸ‘€︎ u/MdNursyazwi
πŸ“…︎ Apr 18 2019
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Having trouble connecting my 100 watt solar panel with mc4 connectors to my battery that uses a 6.5x1.4mm dc input. HELP!

I am trying to connect my 100 watt allpowers solar panel to my ecoflowtech river battery. My solar panel uses mc4 connections and the battery uses a 6.5x1.4mm dc input port that accepts 10-24 volts and up to 110 watts. To connect my panel to the battery I am using an mc4 to 5.5x1.2mm dc cable and a 5.5x1.2 mm dc female to 6.5x1.2mm dc male adapter that came with the battery. With my cable and adapter attached to the solar panel my multimeter reads around 18 volts but when I plug it into my battery it does not react or charge. I attached links to my set up below. Can anyone tell me what I am doing wrong?

Solar Panel: https://www.amazon.com/gp/product/B013E07FNM/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

Solar Panel Cable: https://www.amazon.com/gp/product/B0751BZJT9/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Battery: Ecoflowtech River https://ecoflowtech.com/technology/

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πŸ‘€︎ u/davebfromsb
πŸ“…︎ Dec 16 2017
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The well-known MC4 connector line from StΓ€ubli continues to evolve solarbuildermag.com/produ…
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πŸ‘€︎ u/Neython
πŸ“…︎ Sep 11 2019
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Wiring a 4-panel Renogy system in Parallel, can I skip the MC4 Branch Connectors?

Basically, they are friggin' $12 a piece and to wire 4 panels in parallel I'd need 6 of them. Is there any reason I can't just cut and splice the wires?? Thanks for the help!

The parts I'm talking about:

Wiring image

Amazon Link to product

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πŸ‘€︎ u/posikris
πŸ“…︎ Jul 19 2016
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How to make MC4 Connectors | Adding a solar panel | extending your solar... youtube.com/attribution_l…
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πŸ‘€︎ u/vantasticodyssey
πŸ“…︎ Sep 05 2017
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Does anyone know if MC4 solar panel connectors are waterproof when they're NOT plugged in?

Put up my panels yesterday but have to wait for some cable extensions to wire everything up so the plugs are out and exposed to the elements. Are they safe? Or are they only waterproof when connected to each other?

πŸ‘︎ 3
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πŸ‘€︎ u/NothinButNoodles
πŸ“…︎ Oct 24 2021
🚨︎ report
MC4 Branch Connector Lower PV output?

If I have a M/FFF and F/MMM MC4 Branches but don't use 1 of the 3 (ie. only M/FF and F/MM are used) will that lower my PV output?

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πŸ‘€︎ u/Cronenberg_Rick
πŸ“…︎ May 02 2021
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MC4 connectors

Is there any advantage to using the MC4 connectors to wire my panels in parallel vs a clean proper splice? Thanks!

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πŸ‘€︎ u/bradleymonroe
πŸ“…︎ Jun 24 2018
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