The inverter is in its automatic startup or self-test phase (as soon after sunrise as the solar modules are delivering sufficient power). Blue light generally indicates a functioning inverter, 2. It could reflect system errors, 4. This document provides a concise guide for understanding the status lights on your SolarEdge inverter. For additional information, visit the official SolarEdge support page: SolarEdge LED Guide. The following tables detail the possible LED and switch combinations, and what they mean. As soon as the conditions are met, the inverter will. It's a sight that makes any solar owner's heart sink. Your money-saving solar system has suddenly become a confusing, silent box on the wall.