NABCEP PV Installation Professional Practice Exam

If a battery is allowed to overdischarge, it may suffer from permanent damage and reduce its lifespan. Overdischarging refers to the state where a battery is drained beyond its minimum voltage level, which can lead to several adverse effects depending on the type of battery.

For lead-acid batteries, for instance, overdischarging can result in sulfation, which can hinder their ability to hold a charge. Lithium-ion batteries, on the other hand, may experience degradation of the cathode material and can become unsafe, potentially leading to swelling or leakage. In both cases, repeated overdischarging can significantly reduce the battery's overall capacity and operational life.

Thus, understanding the critical importance of maintaining appropriate discharge levels is vital for ensuring longevity and performance in battery systems. This emphasizes the need for systems designed with battery management features that prevent overdischarge situations.