To get a better grasp of what's going on within the Smart Splitter, understanding the meaning behind each LED color can be useful. Here is a brief troubleshooting guide: Viewing the photo above, we can dissect the various colored lights and their meanings. White: Idle. There is nothing happening, no charging is occurring. Green: Receiving power. Smart Splitter is actively charging, and power is being emitted. Yellow: Charging paused. Secondary side of Smart Splitter is paused as the Primary is receiving power. Blue (flashing): The Smart Splitter has previously been connected to wifi, but lost connection. Red: Error, car not charging. This could be due to an overcurrent, or total power exceeding the limit. If the red lights persist or for some reason the Smart Splitter has no lights turning on at all, the first effective method of troubleshooting would be to perform a factory reset.  If there is persistence with the lights not functioning or you have unanswered questions, please proceed to reach out to our Customer Support team and we will be happy to further troubleshoot with you!