LiFePO4 batteries are popular for various applications, including:
- Electric vehicles
- Solar power storage
- Backup power systems
One of the most common questions about these batteries is how long they last.
In this article, we’ll provide a detailed answer to the question, “How many years do LiFePO4 batteries last?”.
The Average Lifespan of LiFePO4 Batteries
LiFePO4 batteries are known for their longevity, safety, and durability. While the exact lifespan of these batteries can vary based on several factors, they typically last between 5,000 and 7,000 cycles. If you charge and discharge the battery once per day, it can last for about 13 to 19 years.
After this time, the battery still holds 80% of its capacity.
Factors that can affect the lifespan of LiFePO4 batteries include the following:
- The quality of the battery: Higher-quality batteries tend to last longer than lower-quality ones.
- How the battery is used: Using the battery in extreme temperatures or discharging it too deeply can shorten its lifespan.
- How the battery is charged: Overcharging or undercharging the battery can also reduce its lifespan.
- How quickly is the battery charged or discharged? If they are cycled at a high C-rate, the lifespan will reduce.
How to Extend the Lifespan of LiFePO4 Batteries
While LiFePO4 batteries have a relatively long lifespan, you can take steps to extend their life even further. Here are some tips for maximizing the lifespan of your LiFePO4 battery:
- Avoid overcharging or undercharging the battery: Make sure to keep the battery between 10 and 90% of its rated capacity.
- Keep the C-rates low.
- Use the battery in a moderate temperature range: LiFePO4 batteries work best in temperatures between 59°F and 95°F or 15°C and 35°C. Avoid using the battery in hot or cold (freezing) temperatures.
In the image below, you can see that the amount of cycles the battery can do depends highly on the temperature of the battery cells. At 25°C or 77°F, the cell can do 6,000 cycles while still having 80% of its capacity left.
On the other hand, at 45°C or 113°F, the cell can only do 2,800 cycles until it has 80% of its capacity left over.
Conclusion
LiFePO4 batteries are an excellent choice for various applications thanks to their durability and long lifespan.
While the exact lifespan of these batteries can vary based on several factors, they typically last between 2,000 and 5,000 cycles. By following the tips in this article, you can extend the lifespan of your LiFePO4 battery even further.
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I’m an off-grid enthusiast. I created this website to give clear and straight-to-the-point advice about solar power. I’m also the author of the book ‘Off-grid solar power simplified‘. Read more about me on my about page, check out my Youtube channel, or send me a message.