Quick Answer
LiFePO4 batteries are generally 30-50% more expensive than flooded batteries.
Life Cycle Comparison
When it comes to cycle life, LiFePO4 batteries outperform flooded batteries. A typical deep cycle flooded battery may last around 300-500 cycles, with a depth of discharge (DOD) of 50%. In contrast, a high-quality LiFePO4 battery can achieve 3,000 to 5,000 cycles at 80% DOD. This significant difference in cycle life translates to a longer lifespan, reduced maintenance, and lower replacement costs for LiFePO4 batteries.
Cost Breakdown
While LiFePO4 batteries are more expensive upfront, their lower replacement costs and longer lifespan make them a more cost-effective option in the long run. For example, if a flooded battery costs $200 and lasts for 3 years, and a LiFePO4 battery costs $500 but lasts for 10 years, the LiFePO4 battery will actually save you money over its lifespan. This is especially true for heavy-duty applications, such as off-grid solar systems, where battery lifespan is critical to system reliability.
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