The SecureRefrig.Com uninterrupted power supply (UPS) is used in conditions where you may have frequent power outages or the main power to the system can be tampered with.  Magnetic lock systems are fail-safe systems, they need power to operate.  Our UPS units are in a steel enclosure that measures 8”H x 7”W x 3” deep and can power a 5-lock system for over 5 hours and a single lock system for over 12 hours.