1. Assess battery consistency. Poor consistency in battery packs leads to rapid capacity degradation and unstable performance. When selecting LiFePO4 batteries, request manufacturers' data on internal resistance and capacity matching within packs. Prioritize products from highly automated manufacturers.
2. Verify Key Parameters
2.1 Capacity Marking: Must be clear and explicit; avoid products with no marking or ambiguous labeling.
2.2 Cycle Life: Request manufacturers to provide test data; prioritize products with ≥6000 cycles.
2.3 Safety Certifications: Ensure compliance with UL, CE, RoHS, UN38.3, and other relevant certifications.
3. Define Your Application Scenario
3.1. Residential Energy Storage: Calculate required capacity as average daily consumption × 1.2. Typically, 5-20kWh systems suit households.
3.2. Commercial/Industrial Energy Storage: Consider peak-valley arbitrage strategies and select cells with high cycle life (≥6000 cycles).
3.3. Portable Outdoor Energy Storage: Prioritize weight and volume by choosing models with high energy density.
Common Misconceptions and Countermeasures When Purchasing Lithium Iron Phosphate Batteries:
Misconception 1: Neglecting the Battery Management System (BMS)
The BMS is central to battery safety, providing protection against overcharging, over-discharging, and short circuits. Buyers should prioritize products equipped with intelligent BMS and verify the comprehensiveness of its protective functions.
Misconception 2: Underestimating the Impact of Low-Temperature Environments
LFP batteries experience performance degradation in cold conditions. Users in northern regions should select products with preheating capabilities or low-temperature optimized models, or implement insulation measures.
Misconception 3: Focusing Solely on Price While Neglecting Quality
Low prices may indicate inferior cells or recycled batteries. Solution: Balance cost and performance by selecting products from reputable brands with transparent technical specifications.
Therefore, Purmar recommends considering four core factors when choosing a LiFePO₄ battery energy storage system: safety, lifespan, cost, and after-sales service. While LiFePO₄ batteries have limitations in energy density and low-temperature performance, their overall advantages make them the most balanced choice currently available.
