Common Mistakes When Connecting LiFePO4 Batteries in Series and Parallel

Keywords: LiFePO4 battery installation, connection mistakes, energy storage safety, lithium battery maintenance

LiFePO4 batteries are durable and safe, but improper connection or installation can cause significant performance loss—or even damage. Here are the most common mistakes people make and how to avoid them.

1. Mixing Different Cells

Never connect new and old cells, or cells from different brands or capacities. Differences in internal resistance cause unbalanced charge and discharge, shortening lifespan.

2. Ignoring Pre-Balancing

Before connecting batteries in series or parallel, all cells must be charged to the same voltage (usually within ±0.01V). This ensures even energy distribution.

3. Skipping BMS Installation

Operating LiFePO4 batteries without a Battery Management System is risky. The BMS prevents overcharge, over-discharge, and short circuits—critical for safety.

4. Poor Wiring Practices

Loose terminals, undersized cables, or uneven wire lengths can lead to voltage drops and overheating. Always use high-quality connectors and secure every joint firmly.

5. Overloading the System

Ensure your inverter, BMS, and cables are rated for the system’s maximum current. Overloading may cause voltage imbalance and shorten the battery’s service life.

Conclusion

Avoiding these mistakes ensures your LiFePO4 system performs reliably for thousands of cycles. Whether assembling a small 12V pack or a large-scale solar ESS, following best practices guarantees both safety and efficiency.

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