Solar Crimping Tool for Solar Panel Cable with 12 Pairs Solar Connectors, 1PCS Solar Crimper, 2 PCS Spanner Wrench, Crimper Tool for 2.5/4/6mm² Solar PV Wire

I bought this for the value. I needed the tool, and this kit gave me the most connectors along with it for my money. The crimper is well made, easy to use, and the connections have so far been reliable. As a newbie to solar installation, there was one omission that took me many google and Youtube searches to learn: Which connector body, with which contact insert, goes on which cable??? I don't have the crib sheet I created in front of me, so I'm hesitant to document it here. What I remember is that the housings have a small '+' or '-' molded into them. These are assigned from the PANEL's perspective, not the battery or controller's. A MALE body gets a FEMALE contact, and vice-versa. I wish the kit included a pin extractor tool and some extra contact inserts, as I now have some useless mis-assembled connectors. Sigh. The people who sell extension cable sets package them in red/black pairs. Ignore the colors, as each wire gets a + connector on one end, and a - connector on the other. When you're connecting panels in series, you end up connecting red wires to black all the time, there's no way to avoid it.

They work perfectly, easily and the crimper is excellent. Buy it.

The connector pins were missing. The box is nice, the crimper appears to be solid and the MC-4 connectors are as expected, but untried. However, without the connector pins, the whole kit is pretty much useless.UPDATE: Vendor offered to make this right but I had already purchased pins and used the kit as intended. Despite the missing pins, the kit is solid and did the job. I would buy again. I gave them 2 stars back for a good kit and stellar customer service.

The crimper does a great job and the connectors work fine.

This makes nice crimps, generally use the middle one. Oh and easy one-handed use.

My Kit did exactley what I expected it to do. Instructions would have been nice, but after a few you tube videos I was ready to make my connections. My crimps were tight and appear to be waterproof. If the wrong gauge wire is used I can see where it wouldn't be waterproof, as others have staited. My crimper worked perfectly but you need to ensure you fully compress the tool for it to release. However their is a release lever if you need to release the tool to readjust before making the final crimp. I've yet noticed any voltage issues with my connections and will update if I find any.

excellent crimper and connecters. Just buy it.

Instructions included are extremely basic and essentially worthless. There are no links included with / in the packaging for help or FAQs. There are 3 different size “notches” on the tool, but no info on which to use with what.The tool works and the connectors appear to comply with some MC4 standard. Once assembled, connectors seem solid and they connect to my existing solar installation. I was able to make some good connections and some bad connections - only wasted 1 pin because I used the wrong “notch”. Trial and error...Bottom-line, I was able to assemble an extension cable, but not without YouTube videos to help. I would not have been able to assemble the extension cord with the information provided in this package.I gave this product a 4 because it worked, but it is by no means a complete package - 3.5 tops