Answers · Maintenance
How to Store Lithium Batteries Long-Term
Direct answer
Store LiFePO4 at 50-60% state of charge (3.30-3.35V/cell) in a dry, 0-25°C space. Avoid storing full or empty . both speed capacity loss. At 50% SoC and 20°C a pack loses only 1-2% per year. Top up to 50% every 6-12 months if storing over a year.
Step-by-step storage
- Charge or discharge to 50-60% SoC (not full, not empty).
- Disconnect from the inverter and all loads.
- Store in a cool (0-25°C), dry place away from metal objects.
- Check voltage every 6 months; recharge to 50% if it drops below 30%.
What to avoid
- Full charge storage . stresses the cathode, 3× faster aging than 50%.
- Empty storage . self-discharge can drop cells below 2.5V, causing permanent capacity loss.
- Heat . every 10°C above 25°C roughly doubles the degradation rate.
Related: battery lifespan and degradation guide.
Frequently asked questions
What charge level should LiFePO4 be stored at?
Store LiFePO4 at 50-60% state of charge (about 3.30-3.35V/cell) in a dry place between 0-25°C. Avoid full charge or empty storage . both accelerate capacity loss. At 50% SoC and 20°C, a pack loses only 1-2% capacity per year in storage.
Need storage-ready packs?
Luchu Energy ships at 50-60% SoC for long transit. Ask about shipping →