@Coulomb ,Could you share the latest firmware for the King II? I'd appreciate it! I'm trying to communicate with an EG4 Lifepower4 lithium battery, but the current firmware doesn't have options for lithium battery protocols. I even saw on the EG4 website that in the Voltronic inverters they sell as 6kW 140V, in the configuration menu, when selecting the battery, an EG4 option appears, which already communicates directly with these batteries of the same brand. But I haven't found anything similar for the King II. Could you share a firmware that allows the King II to communicate with lithium batteries? My current firmware versions are: U1: 51. 01 U2: 13. 20 U3: 00. 24