How to Store Your LiFePO4 Battery Properly

The LiFePO4 batteries have emerged as the top choice thanks to their reliable performance, exceptional safety, and straightforward installation. However, to ensure their longevity and optimal performance, it's vital to store them correctly when they're not in use.

Why Store LiFePO4 Batteries Properly?

Proper storage of LiFePO4 batteries is crucial to prevent over-discharge, which can not only damage the battery but also result in financial loss. Improper storage can also impact battery performance. While frequent users may not pay much attention to storage issues, those who use batteries seasonally—such as summer campers—should particularly focus on how to store their LiFePO4 batteries properly during idle periods.

How to Store LiFePO4 Batteries

Storage Environment: Ensure the storage area is dry and well-ventilated year-round. Avoid extremely hot or cold environments.

State of Charge (SOC): Store the battery with an SOC of 50% or above, but avoid full SOC. This is the optimal storage capacity.

Summer Storage:
Due to higher temperatures, LiFePO4 batteries have a higher self-discharge rate of about 3-4% per month.
Store in a cool indoor location to avoid overheating.

Winter Storage:
The self-discharge rate is lower in winter, around 2-3% per month.
Store the battery indoors at temperatures higher than room temperature, especially if it can reach -20°C. Extremely low temperatures are not ideal for batteries.

Disconnect Loads: When storing, disconnect all loads from the battery. Avoid storing the battery with the BMS/inverter/charger connected, as this can accelerate battery discharge. If necessary, use a battery protector.

Rebalancing: Rebalance the battery when you re-enable it after storage.

Storage Time and Temperature Recommendations:
1 month: 0°C to 40°C
3 months: -10°C to 35°C
6 months: -10°C to 25°C
It's advisable to perform a complete charge-discharge cycle every six months to maintain battery performance.

Summary
Understanding the advantages of LiFePO4 batteries is important, but so is knowing how to store them properly. Correct storage practices can effectively increase the lifespan and maintain the performance of your LiFePO4 batteries.