The benefits of voltage correction are very simple: the more abnormally high or low input voltages the UPS corrects on its own, the less it has to rely on its batteries. This helps batteries last longer and reduces the number of times they need to be replaced. Tripp Lite Modular E3 Series 3-Phase UPS Systems correct the widest range of input voltages in the industry without relying on the battery. Tripp Lite models correct undervoltages as low as 45% below nominal input and overvoltages as high as 25% above nominal input—a 70% correction range (+/- nominal input). Typical competitors' models only correct undervoltages as low as 15% below nominal input and overvoltages as high as 15% above nominal input—a 30% correction range (+/- nominal input). The advantage of Tripp Lite's superior voltage correction is dramatic, with up to 40% less potential battery wear!