Watch this video to see what the difference is between the Kyocera solar panels KD140SX and the KD140GX. The Kyocera solar panels are very popular for DIY Solar systems for cabins, boats, and RVs. It is available in two different models, the KD140GX and the KD140SX. The KD140GX has a sealed junction box, PV Wire, and SMK connectors, making it easy to wire multiple panels together in series. The KD140SX has a junction box, or j-box, that opens, allowing you to use your own wire, and easier connect a few solar panels together within the junction box, eliminating the need for specialized solar connectors.