Quick Answer
Shallow discharge of lead-acid batteries can significantly increase their lifespan by reducing the number of charge/discharge cycles, which is a major factor in battery degradation.
Causes of Shallow Discharge
Shallow discharge occurs when a lead-acid battery is not fully discharged before being recharged. This can happen when a system is not used for extended periods or when the battery is not sized correctly for the load. A shallow discharge of 50% or less can help prolong the battery’s lifespan.
Effects of Shallow Discharge on Lifespan
Studies have shown that shallow discharge can increase the lifespan of lead-acid batteries by up to 300%. For example, a battery that is fully discharged 100 times will have the same lifespan as one that is shallowly discharged 300 times. This is because shallow discharge reduces the number of charge/discharge cycles, which is a major contributor to battery degradation.
Practical Application of Shallow Discharge
To take advantage of shallow discharge, it’s essential to size the battery correctly for the load. This may involve installing a larger battery bank or using a battery management system (BMS) to regulate the charge/discharge cycles. Additionally, deep cycle batteries should be used instead of starter batteries, as they are designed to handle shallow discharge and provide longer lifetimes.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.