LiFePO4 vs Lead-Acid Batteries

Solar lights and solar storage systems use rechargeable batteries, and the two chemistries most often compared are LiFePO4 (lithium iron phosphate) and lead-acid. This guide compares them at general level. It does not present general chemistry knowledge as a specification of any named model on this site, and it does not quote cycle life or capacity figures for a specific product, because no such model table has been published for the battery series.

LiFePO4 batteries are generally lighter for the same stored energy, tolerate deeper discharge, and last for more cycles than lead-acid batteries. They are also generally more expensive per unit of stored energy. Lead-acid batteries are generally heavier and cheaper, tolerate less deep discharge, and need more careful maintenance, particularly for flooded types. For a solar light, the practical difference is weight, size and replacement interval: a LiFePO4 battery in an all-in-one housing keeps the unit lighter and extends the time before the battery must be replaced.

The AN-SLZ street light series uses LiFePO4 batteries, with capacities from 192WH on the 40W model to 1152WH on the 150W model, as published in the model rows. Those figures are the street light models' own specifications, not a general claim about LiFePO4 chemistry. A buyer comparing chemistries for a storage system should ask for the specific battery model's capacity, cycle life and warranty in the inquiry, and should compare those figures rather than relying on a general comparison.