When I ordered this I pinged support on the length because that is absent from the product description. when I got it i found that it is about a 1Foot. I wished it was a little longer. between the short cable on the solar panels and this cables relative short length, they are just not enough. I think if it was about 18" to 24" in length it would satisfy the length needs. an option would be to offer this in several lengths. I would hate to but\y the longer extension cables to just chop off an end.
To make this work I had to solder and extension to the cable, this looks a bit unprofessional and down grades the Pizazz of the project.