solar charge controller blinking flashing

Solar Charge Controller Blinking & Flashing Meanings and Fix

What is a solar charge controller lights Flashing?

A solar charge controller is an essential component of any solar power system. It typically has a series of on-screen icons and indicator lights that show the status of the system.

These icons or lights will blink, flash, or display different colors to indicate different system statuses.

The LED indicator can only show the status of the system by lighting up and changing color, it does not show as much information as the display, but it is very intuitive and you can tell at a glance whether the system is working or not.

In addition to the on-screen message, the LED indicator also changes color to indicate the status.

If there is an error with the system, besides the screen, you can also find the indicator flashing.

You can read the manual to find the status description so that you can quickly understand the system status and troubleshooting.

What Does It Mean When Your Solar Charge Controller Blinks or Flashes?

Solar Charge Controller icon and lights Blinks or Flashes to indicate the operating status of the solar system components connected to the solar controller.

These are the most common lights that you will see on your solar charge controller, whether it is an MPPT solar controller or an economic PWM controller.

What do the different blinking and flashing lights on a solar charge controller mean?

The icon and lights on the solar controller flash or change color for the solar panels, battery, and loads that are explained as fellow.

Solar Panels:

Solar panel flashing green light When the solar controller detects solar energy input, the PV icon and light will blink for a few seconds, and then enter a stable state.

The screen will not light up and the indicator light will not light up if the solar regulator does not detect the solar input.

If the solar input is unstable or the pressure is too high, the solar panel light will blink yellow or red to indicate that the solar input is not stable.

The solar panel light does not light up at night because there is no solar input, if the light does light up, there is a problem with the charge controller.


Solar charge controller battery icon flashing means that the battery is not charging properly, which may be caused by insufficient battery power, charging problem, ambient light change, controller malfunction or bad weather conditions.

Solar battery light blinking yellow means the battery is charged.

solar charge controller battery blinking green means the battery is fully charged and in a saturated state,

A flashing red battery light means the battery is undercharged and needs to be recharged in time.


Solar controller loads are small DC devices that can be powered directly by a solar battery. They are displayed as light bulb icons on screens and LED lights.

On the screen, when the load icon flashes, there is an overload of short circuit.

In the indicator light, if the load indicator is green, it means the load is operating normally.

If the light is off, it means there is no load connected or no power input.

Load light flashing red means the load is overloaded, will stop running and enter a protection state.

Load light flashing yellow means the load can run but the power is a little low.

How to troubleshoot and fix solar charge controller blinking and flashing lights

If you are experiencing blinking and flashing lights on your solar charge controller, the first step to take is to identify the specific lights that are blinking or flashing.
Once you have identified the lights, you can locate the problem by referring to the meaning of the flashing lights mentioned above, as well as the instructions in the product manual.

Here are some tips on how to maintain and troubleshoot your solar charge controller:

• Read the manual for your solar charge controller carefully. This will help you understand the different lights on the controller and what they mean.

• Keep your solar charge controller clean and dry. Avoid dust, moisture, and extreme temperatures that may affect its performance and lifespan.

• Check your wiring regularly. Make sure that there are no loose or faulty connections, corrosion, or damage in your wiring. Use the correct wire size and type for your system voltage and current.

• Check your equipment regularly. Make sure that your solar panels, battery, and load are working properly and compatible…

• Do not overload the solar system. Be careful not to connect too many devices to the system at once.

Useful Resource:

How to troubleshooting the Solar Charge Controller

Solar Charge Controller not charge Fixing Guide

How to setting the Solar Charge Controller

Solar Charge Controller Voltage Setting Guide

How to Turn Off solar charge controller

Solar Charge Controller No Display Fix Guide

How Much Does an MPPT Solar Charge Controller Cost?

Inverter Charger Ultimate Guide 2023

MPPT vs PWM : Which Charge Controller is Better?

Is Sun a Renewable Energy Source?

Are Deep Cycle Battery battery for Solar System?

Leave a Reply