How Long Do Solar Batteries Actually Last?
AGAIC LiFePO4 batteries are rated for 6,000+ cycles at 80% DoD. Daily cycling = 16+ years. Warranty: 70% capacity at 10 years or rated cycles.
What Kills Batteries Early
- High temperatures (install in shaded/cool area)
- Deep discharges below 80% DoD regularly
- Cheap BMS that does not balance cells
LiFePO4 vs NMC Lifespan
NMC typically delivers 500–1,500 cycles before significant degradation. LiFePO4 delivers 4–8× more cycles. Over 15 years, a LiFePO4 system costs less per cycle despite a higher upfront price.
