If there’s not enough sunlight falling on the solar panels due to cloudy weather, shadow, or any other reason, the panels won’t recharge the battery, and hence the outdoor solar lights might not work. Most solar lights require only a few hours of direct sunlight to charge the batteries.
It sounds simple, but it’s an easy detail to overlook. Almost every solar light has an on/off switch, typically located at the back. During the day, the solar panel charges the battery, but if the switch is off, the lights won’t turn on when night falls. So, if your solar lights aren’t lighting up, the first thing to check is this switch.
Most solar lights have a built-in sensor (usually a photoresistor) that acts like an automatic switch, keeping the lights off during the day so the battery can charge and turning them on when it gets dark. But if the sensor isn’t working, it might not “know” when it’s dark, so the lights stay off at night.
Most of the outdoor solar garden lights come with ON/OFF button, and that button needs to be turned ON. In many cases this simple thing is ignored by many people and this is one of the main reasons why your solar light isn’t working as expected. There might also be a factory defect and the light doesn’t turning ON. 2.
Batteries’ lifespan has come to an end “In most cases, solar-powered lights stop working when a battery is dead, so you might want to take a look and see whether they are worn out or too old. While there are long-lasting batteries like Nickel Metal Hydride batteries (NiMH), they also drop in performance as time goes.
Most newly purchased solar lights come with rechargeable batteries. After their normal life span (typical couple of years) they tend to stop working or start performing poorly. If you see declined brightness in light, then it’s a time to change the batteries.
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