I specifically asked if I needed this to charge my Jackery 240 solar generator with my 80w ZAMP solar panels. The supplier told me "YES". The SAE solar panel connector mated with the 8mm DC plug for the jackery input. But did it charge Jackery? NO, THAT IS NOT SO. The entrance light did not come on. Nothing has happened. This leads me to the conclusion that either the included wiring is faulty or there is some mystery I have yet to uncover. It doesn't have to be rocket science. Even though the connectors on both ends match, it doesn't work.