If a warning light is blinking on the Solar Charge Controller, it may be due to faulty wiring, battery over-charging or under-charging, or equipment failure. So you have to make sure your system is properly wired, your equipment is up to date, and your battery is being charged. If the solar green light keeps flashing, it typically indicates an issue with the device that requires attention. Check the solar panel for obstructions, as dirt or debris can hinder performance, leading to inconsistent charging. In addition to the on-screen message, the LED indicator also. To resolve a solar light that consistently flashes, the following steps are essential: 1. But that rapid blue flash isn't a good sign.