Handa HD brand Network 6Pin Waterproof Communication Box can waterproof protect and install the 6 network cable or RJ45 cables from users' side to Inverter and battery panel side for communication useage. IP68 higher waterproof protection level. Solid connections system also can provide the solutions for data transmission in harsh environments.Moreover, Handa can customize 12pins waterproof communication box for larger solar inverter system.