Early this morning my ESS system was in Passthru so no scheduled charge and no battery supply. I knew this was a breakdown between the Grid meter and the ccgx. Sure enough in the CCGX "no grid meter" was showing. I checked he fuse box and the grid meter was showing a red LED so this was alive. I then checked the CCGX connection expecting to see no flashing red/green leds in the USB connection. In fact there was green flashing but not much red. I removed the USB cable and then re connected. There was a small flash so I thought I may have fused something but then both red and green LED's were flashing and the system was back up and running. No idea why it stopped but it was an easy fix. Hope it helps someone.