Sola/Hevi-Duty's ferroresonant power conditioners protect equipment from all power problems other than a complete loss of power. They excel at tightly regulating voltage within ±1.0% for input variations up to +10%/-20%, provide superior noise attenuation and are designed to withstand the harshest electrical environments. With no moving parts, Sola's ferroresonant power conditioners are virtually maintenance-free.