Why are only half of my solar lights working?

Why are only half of my solar lights working?

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If you are encountering the problem of only half of your solar lights working and half are not then you are not alone! There are many solar light users who face this problem.

If you want to know why are only half of my solar lights working? then this article is for you.

Key takeaway: Major reason only half of your solar lights are working is charging issue in the batteries.

In this article, I have braked down why half solar lights are not working. So let’s dive in.

Why do only half of my solar lights work?

There can be many reasons to why half or some of your lights are not working. Out of those many eight are major ones. I have listed them below.

Why do only half of my solar lights work?

1. Old age of battery

The first and biggest reason for not working of half of your solar lights is the age of battery.

Age of battery greatly impact the working of a solar light. Older solar lights will perform less than the new ones.

If you have solar lights out of which some are brand new and some old, identify the old ones and check the battery by replacing it with a new one.

2. Dust on solar panels

Second reason for the not working of your outdoor solar lights is dust on the solar panels of solar powered lights.

If there will be dust on the solar light’s solar panels than the panels will be unable to generate the electric charge during the day leading to the rechargeable battery not getting charged.

If the battery will not get charged it will not be able to supply electricity to LED lights of your solar lights in the night.

3. Light sensor not working

Third important reason for the not working of the solar lights is a malfunctioned light sensor.

Light sensors in solar lights helps to detect dark and complete the circuit to provide illumination.

If the light sensor will get faulty it will not be able to detect the dark and the circuit will not complete leading the light not shining up.

Related: Solar lights ON all the time?

4. Shadow on solar lights

Fourth reason is not charging of solar lights due to presence of shadow like clouds, trees, nearby buildings, etc. on the solar energy powered LED lights.

Check if the solar lights that are not working are not placed under any shadow. If they are, remove them from there and place somewhere else.

5. Incorrect position

The fifth reason is somewhat similar to the fourth one. Just like shadow on solar lights incorrect position of the solar lights can also prevent them from working at night.

Incorrect positions like tilting of the solar lights, falling over on ground, etc. can prevent the solar lights to receive the required sunlight for charging.

And again if the solar lights battery will not charge they will not work in the dark.

6. LED bulbs old age

Just like the battery the LED’s of your solar light can also be the cause of some of your solar lights not working.

With time LED bulbs become dull and dim and loose brightness. It can be the case that they have become very dull and you are not able to see brightness coming out of them.

If that is the case replacing the old solar lights LED’s with new ones will solve this problem.

7. Circuit fault

Fault in the circuit can also be a possible reason for only fifty percent of your solar lights working.

A faulty circuit will not to be repaired or completely replaced for the smooth working of the solar lights again.

8. Wiring issue

One more reason for some of the solar lights not working is any problem with the wire.

Due to heat or any fault the internal wiring of the solar light can get damaged or cut.

If that will be the case your solar light will not function.


Solar lights are a great alternative to clean and green energy. They help in removing the reliance on grid power for illuminating our outdoors.

If your sun energy powered LED lights are not working in full then the reasons listed above can be the cause.

Checking and rectifying the issues listed above will help you again getting illumination from your solar lights.