Dear g szo, could you inform what bms protocol shbms uses? I try to use it with solar assistant, so far, no luck. With SaiHang sw it works OK when rs232 is selected even adapter must be rs485-usb connected to HC port ;-). A-2,B-1,Gnd-3 must be also connected, Battery I use is Ibattery 51.2 200Ah (Easun) without dip switches. (Address is selected from lcd-menu). Easun Isolar SM IV 5.6kW inverter also working w battery OK with 74.04 fw and panel sw updated 22.20 and 05 value set pylon (Model is actually same as Axpert MKS 4 5.6kW). 05-LIC mode not working w battery.