What is wrong with these MC4 connectors?

[cajocars]

I’ve recorded myself trying to insert the metallic bit into the plastic bit; I’m supposed to hear a click but it doesn’t happen, and when I pull it out there is a metal bit coming out.
Am I doing something wrong or have I got really bad connectors?

 

[littleharbor2]

The video isn't showing up but my first guess would be that you are trying to insert the wrong terminal into the housing. The male and female terminals aren't interchangeable in the housings.

 

[cajocars]

It should work now
Video

I'm inserting the bigger terminal into the male housing (the one in the video) and the smaller terminal into the female housing, which should be correct

 

[kommando]

Your link is dead

We searched high and low, but we couldn’t find the page you're looking for. It may have been moved or deleted, or may never have existed at all.

 

[cajocars]

Your link is dead

We searched high and low, but we couldn’t find the page you're looking for. It may have been moved or deleted, or may never have existed at all.

I don't know why, but it only works for a few minutes

Let's try with YouTube

 

[SeaGal]

my posting re the ends...

Solar panel / which end is pos/neg?

Purchased EG4 6000XP, (split phase), (10) new 400W Canadian Solar panels and an EG4 100amp battery. LL-S. 6000XP takes 480v max, 4000 watts per mppt. Panels are 37.1 amps each, living in Missouri. So far, I have mounted my panels to the roof, and hung my inverter next to my main panel. Just...

diysolarforum.com

 

[cajocars]

I've used the correct connectors in the correct housing; the video should now work

 

[littleharbor2]

Well, that connector is clearly messed up. Are they all coming apart like that?

 

[cajocars]

Well, that connector is clearly messed up. Are they all coming apart like that?

I tried two, one male and a female
They’re the ones that came with the crimp tool

10 Pair Solar Crimp Tool Connector Spanner+PV Crimper Wire Stripper Crimping Kit | eBay

1 x Wire Crimper. These crimping pliers. Apply to - Crimping Tools/Solar Pv Tool Kits for Solar Connector. Crimping pliers length: approx. Crimping range: 2.5-6 mm². Complete Toolkit - Easy and accurate installation of solar connectors.

www.ebay.co.uk

 

[littleharbor2]

Well, the inner "catch" part shouldn't come out of the housing. I don't know what to say and I have crimped, literally thousands of these MC-4's. Never seen this happen. Can you look up a YouTube vid on doing these crimps and see if you are possibly doing something wrong/different than how it should be done?

 

[kommando]

The tangs look to be engaging with the internal retainer and then when you pull the retainer is coming out when it should stay in. I had some like that from Solax for connecting to the inverter, they went in the bin. Well at least you have a crimper now.

 

[SeaGal]

They’re the ones that came with the crimp tool

Ah!.. from eBay, the world renowned supplier of top quality MC4 connectors

 

[SparkyJJO]

Get some better connectors. The included ones with those kits tend to be crap (this is pretty universal across the board no matter the connector type)

 

[cajocars]

Could it be than when I slide the rubber bit over the crimped connector I am bending the metal teeth enough for them not to grip?
I have tried to remember to do it before and that one seems to hold

 

[kommando]

But the teeth are working as when you pull its the internal insert that is being pulled out by the teeth, put them in the bin and buy better quality connectors.