An uninterruptible power supply (UPS) system is your bridge between mains power and your backup generators. Automatic mains failure (AMF) panels also referred to as automatic transfer switch (ATS) panels make the power switch to emergency standby generators in the event of a significant loss of mains power or total blackout. Without AMF panels, generators need to be operated manually and that can mean lost data, potential damage to electrical equipment and huge amounts of disruption.