Sun YOBA 5 Pairs of MC4 Male/ Female Solar Panel Cable Connectors
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- Rated current: 25A (2.5-4.0mm2)
- Degree of protection: IP2 * / IP67
- Rated voltage: 1000V DC
- Flammability rating: UL94-V0
- Test voltage: 6000V (50Hz, 1min)
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Rated current: 30A (2.5-4.0mm2)
Degree of protection: IP2 * / IP67
Rated voltage: 1000V DC
Flammability rating: UL94-V0
Test voltage: 6000V (50Hz, 1min)
Overvoltage category / Pollution Index: CATIII / 2
Adapter Wire: OD4.5-7.0 (2.5-4.0mm2)
Connector contact resistance: 0.5m¦¸
Insertion / Extraction Force: less or equal to 50N / equal or greater than 50N
Connector conductor material: copper, tin
Connector Insulation material: PPO or PBT
Operating temperature range: -40 ~ +90 centigrade
Package include: 5 x male solar panel cable connector
5 x female solar panel cable connector
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I am an Electrical Engineer, and a radio Ham. I work with many types of connectors.
The contacts look like silver plated copper, which means excellent conductivity. The connector snap together so well, with a positive locking mechanism. I love them.
I would use a good quality crimp-er, and I suppose these could be soldered as well. Inserting some dielectric grease into the fitting before connecting would make them bomb proof. The grease ensures water can never get in, I'm not sure it could anyway with these in any case, because of the rubber seal, and the grease also prevents corrosion.
I'd say these connectors could stand up to outdoor exposure for the rest of my life and beyond.
My original plan was to use solder and shrink tubing, and make my own termination box. I am very glad I chose to spend a few bucks on this style connector.
Buy these and and the 2-1 junction connectors that mate to these and you won't regret it. I like these so much that I may start using this for other high amperage ham radio applications.
Use with 10 Gauge stranded wire for solar panel use. Smaller wire would work, but not be a good idea.
UPDATE: BE AWARE THIS PRODUCT HAS CHANGED. All the positive reviews were for the original style connector. It is a bait and switch trap. You will not get the good connectors now. The rubber seal has been eliminated for a cheapo plastic piece attached to the connector. This makes it difficult to fill the cavity with dielectric grease to prevent corrosion and also prevents a good seal where the wire enters the connector. I am not sure if the original style are made any more.
I've been using these since the original are no longer available and they seem to hold up well. I updated my rating to five stars again.
I am back to order more as I expand my solar array with two remote mount panels.
I will not be buying from able provider again! Low quality metal fittings, decent plastic pieces and o-ring, shopping elsewhere for my next set.
These worked well to parallel/series numerous 235w pv panels. They lock together firmly and will not come loose. However, don't bother getting removal tool--it's not necessary. They will come apart easily if both tabs are depressed simultaneously while pulling. I crimped and soldered without problem to #10 AWG copper. One caution: I mistakenly disconnected a string under a load of 72VDC at about 7 amps and it welded burrs and distorted the female and male pins which prevented reinsertion. I replaced the ends and all is well--but do not connect or disconnect under load. This, I am sure, is the case with all MC4 connectors and was a user mistake, item works well.
What I received is exactly as described and shown in the pictures. There is a single, red, O-ring seal for the mating part of the connector, on the receptacle housing barrel. The cable end has what appears to be a very effective collet, for strain relief, and seal for the cable to housing junction.
I don't think that filling these with dielectric grease would be either easy, or necessary. They are simply not designed that way.
I purchased one of the recommended crimping tools, which is ratcheting handle with a three cavity die, for 2.5, 4.0 and 6.0 square-millimeter cross section wire. The 10 AWG wire I purchased will likely require the 6.0 cavity. The insulation diameter of the purchased 'solar' wire fits the seal perfectly.
All in all, a very effective and functional connector system at a very good price.