Battery Discharge & Sizing Analysis is used to select the most appropriate battery banks, verify the maximum capability of existing batteries, and easily simulate a wide range of backup, control, and other DC scenarios. Multiple duty cycles for various equipments are compiled along with randomly activated DC loads to simulate situations such as shutdowns and emergency conditions. Multiple corrective factors are used to compensate for real-life variables such as temperature, aging, and initial capacity that apply to these types of critical electrical systems.