As an environmentally friendly and energy-saving street light, the service life of solar street lights is a concern for many people. So how long can solar street lights last?
Generally speaking, the lifespan of solar street lights is related to their accessories. The accessories of solar street lights mainly consist of solar panels, controllers, batteries, light sources, and lamp posts. The lifespan of different accessories may vary
1. The service life of solar panels is over 20 years, and after 20 years, solar panels will only have a certain degree of light decay (about 30% or more), but they can still be used.
2. Next is the controller, which typically has a lifespan of around 8-10 years, depending on the electronic components and usage environment inside.
3. Next is the battery. In the past, solar street lights generally used lead-acid gel batteries, which have a service life of about 3 years. Lead acid batteries that are approaching their end of life may age severely, and their capacity cannot even reach 10% of the basic level, which basically cannot meet the lighting needs. Nowadays, most of the batteries used are lithium batteries, which have better high and low temperature resistance than lead-acid gel batteries, and have more cycles than lead-acid gel batteries. The deep discharge can reach more than 2000 times, so the service life of lithium batteries can be more than 5 years.
4. In terms of light sources, current solar street lights all use LED light sources, and good LED light sources can have a lifespan of over 11 years.
5. The service life of lamp posts is relatively long. If hot-dip galvanized and rust proof measures are taken, the service life can be over 20 years.
In summary, the main factor limiting the lifespan of solar street lights is the battery. Under normal circumstances, the lifespan of solar street lights is generally 5-8 years, but most accessories can be used normally by simply replacing the battery.
