The 10 piece MC4 kit is very nice providing for 10 connections. Contrary to the image, it includes 2 of the red assembly/disassembly tools! I already had a set, but receiving 2 instead of 1 was appreciated since it takes 2 of these tools to assemble an MC4 connector. These connectors are of the open-barrel type that are U-shaped prior to crimping and produce a double-barrel shaped crimp down onto the wire. Only the open barrel style inserts (dies) which appear heart-shaped in the tool will produce the proper crimp on the open connectors used on the 14, 12 and 10awg connectors. Be sure you have the open-barrel Staubli crimper to crimp these open-barrel connectors! If you try to crimp these with any other style of crimper it will not work. I Highly Recommend the Staubli crimper for the Staubli MC4 connectors! I know there are many copies of this crimper and these connectors. Perhaps,,, you should use the copy tools with the copy connectors... I recommend the real thing!
To say I was satisfied with the reviewed connectors received from Stäubli would be an understatement. I am so satisfied I will be purchasing additional connectors from them.. I can feel totally comfortable recommending them given the fact I will be a return customer..
Unlike so many stamped connectors, the ones I received from Stäubli are much more substantial and should provide a gas-tight crimp onto the 8 gauge wire.
My MC4 solar connectors arrived on time, and I am excited to begin my next solar installation project. Steve was super helpful in answering my questions over the phone regarding proper installation procedures. I would order from Staubli again in a heartbeat. Staubli engineering and manufacturing is unsurpassed!