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The most versatile resource for storing energy is one that can rapidly charge or discharge while supporting the use of renewable energy. As renewable energy sources advance rapidly, batteries play a pivotal role in this progress. When integrating battery energy storage into a renewable energy system, it&#x2019;s crucial to address the issue of battery degradation while implementing operational strategies. Furthermore, since solar irradiation varies due to changing cloud conditions, it can impact how batteries charge and discharge. This study focuses on investigating battery degradation and lifetime. Experimental work is being conducted with lead acid batteries connected to a solar photovoltaics system. The paper provides a detailed investigation of commonly used methods for predicting battery lifespan. It also analyzes aspects such as the effects of depth of discharge (DoD) and battery charge/discharge on temperature changes due to degradation. Using the coarse average approach, global battery aging, weighted Ah aging method, and RFC method, this paper estimates the DoD, temperature, life cycle loss (%), and lifespan and evaluates the extent of battery degradation. The battery lifespan is estimated using this method to be 8.42, 8.72, 8.33, and 8.93 years, respectively.

An Evaluation of Battery Degradation and Predictive Methods under Resistive Load Caused by Intermittent Solar Radiation