How long is the lifespan of solar street lights?

Lifespan of solar street light

The Lifespan of a solar street light mainly depends on its accessories, including solar panels, controllers, batteries, and light sources, the shortest is the battery, the service life of lithium batteries used now is more than 5 years, and the general life of the solar street lamps are 5 to 8 years. Still, the replacement of batteries can continue to be used.

To extend the life of solar streetlights, the key is the accessories. Below is the information on how long the life of solar street lights is and how to extend the life of solar street lights.

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How long is the life of solar street lights

Generally speaking, the life of a solar street light is related to its accessories, the accessories of solar street light are mainly composed of solar panels, controllers, batteries, light sources, and poles, and the service life of different accessories will be different.

1. solar panels, ‘ service life is more than 20 years, and after 20 years the solar panels will only have a certain degree of light degradation (about 30 percent or more), but they can continue to be used.

2. Controller, the general service life is about 8 to 10 years, depending on the electronic components and the use of the environment.

3. Battery, solar street lamps have generally used lead-acid gel batteries in the past, the service life of such batteries is about 3 years, generally fast approaching the age of the lead-acid batteries may be aging very seriously, the capacity of even the base of the 10% are not up to the basic, basically can not meet the demand for bright lights.

Now most batteries use lithium batteries, lithium batteries, have high and low-temperature resistance attributes than lead-acid batteries, a number of cycles than lead-acid batteries than colloidal batteries, and a depth of discharge can reach more than 2,000 times, so the service life of lithium batteries can have more than 5 years.

4, Light source, solar street lamps are used in the LED light source, and good LED light source life can reach more than 11 years.

5, Light poles, the service life is relatively long, if the use of hot-dip galvanized and do a good job of anti-rust measures, life expectancy can be more than 20 years.

To sum up, the main factor restricting the life of solar street lamps is the battery, under normal circumstances, the general life of solar street lamps is 5 to 8 years, but most of the accessories are able to be used normally and only need to replace the battery.

Solar street light with CCTV Camera

How to extend the service life of solar street lights

Solar energy is a kind of green renewable energy, now many places use solar street lights. But the lifespan of solar street lights is limited, to extend its life, the main attention to the following points:

1, Choose high-quality solar panels

The main function of solar panels is to collect light and convert light energy into electricity, regular manufacturers of solar panels have longer life, so we should pay attention to buying quality assurance products.

2, Choose a good heat-dissipation light source

Solar streetlights need to dissipate heat in two locations, one is the head, and the second is the battery. Solar street lamps are generally selected LED lamp heads, we should buy good heat dissipation function lamps, so as to be able to extend the service life of LED lamp beads.

3、Select high-quality battery

The battery is the strong backing of the solar street light, if the battery life is not long, then the service life of the solar street light will not be very long. Generally speaking, the best heat dissipation effect is the kind of A-grade LiFePO4 with an aluminium-magnesium alloy shell, long life, fast heat dissipation, and quality assurance.

4, choose the right solar street light controller

The solar street light controller is the central nervous system in the solar lighting system, responsible for coordinating the work of solar panels, lithium batteries, and loads. It is a key component of the solar street light lighting system, we must not be greedy for cheap choice of cheap controllers, it is recommended to choose a reputable manufacturer and buy a qualified controller.

5、Light pole types

Solar street lights mainly rely on the pole to support, the service life of the street light pole depends entirely on what kind of galvanized, cold galvanized pole will appear after 1-2 months of outdoor use rust, long-term use will have certain safety hazards; good solar street light pole is hot dip galvanized, the service life of up to 20 years.


In recent years, many customers often complain that the solar street lights they bought do not work properly or do not work even in less than six months. Because some suppliers are looking for quick profits in a hurry but do not pay attention to the quality standard of their brand products. A very good quality solar street light can last more than 5-8 years.

Solar street lights systems are project products, usually, a project needs dozens to thousands of sets of solar street lights, if you accidentally choose a low-quality solar street light, you will suffer huge losses, so I recommend customers choose carefully, do not just focus on low-cost products, and I hope that my summary of choose quality solar street light experience can give you some help.