How Long Do Solar Lights Last
If you recently bought some solar powered LED lights, then you must be wondering how long do solar lights last.
Well, if you are looking for an in-depth answer, then this article is specially made for you.
In this article, we will cover how long do solar outdoor lights last, how long does it take them to charge, and how many hours will they stay on.
So without further ado, let’s jump right into it.
How Long Do Solar Powered Lights Last?
The short answer is 1-5 years depending on many factors such as weather, quality, usage, and many more.
However, to properly answer your question, here is a list of the life expectancy of the 3 main solar lights components:
A. Solar Panel
Solar LED Lights’ panels lose their efficiency over time depending on 3 factors: usage, conversion efficiency, and efficiency loss per year.
For example, a Monocrystalline Solar Panel has a conversion efficiency of around 23.54% and an average output loss of 0.8% a year. This means that within 29.3 years, this solar panel will be dead.
Generally speaking, most solar panels last between 10-30 years before they become useless.
B. Solar Battery
On average, your outdoor solar light’s battery can last about 1-5 years before you need to replace them.
The lifespan of the solar light battery is determined by the number of the charge cycles. In other words, how many times you fully charged then discharged the battery.
Different batteries have different life cycles. For example, Lithium-ion batteries can last up to 1000 Cycles while Nickel-cadmium batteries can last up to 1500 cycles.
It’s important to mention that although Nickel-cadmium batteries last up to 1500 cycles, it suffers from memory loss, which means that the battery will lose its charging capacity over time.
For instance, a 1500 mAh Nickel-cadmium battery will only be able to hold 1000 mAh of charge over time and so on.
C. Light Emitting Diodes (LEDs)
LEDs have a life expectancy of 50,000 working hours, so if we assume your solar powered lights will work 8 hours a day. That leaves you with an expected lifespan of 17 years.
Related Article: How Do Solar Lights Work
How Long Does it Take for Solar Lights to Charge and How Many Hours Will they Stay on?
On average, solar powered lights take around 4-8 hours to fully charge and will last for 6-12 hours depending on many factors such as:
- How many hours of direct sunlight do they get during the day
- How intense is the sunbeam
- Solar panel efficiency
- Battery capacity
- Total light output
Related Article: How to Choose the Best Solar Lights
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