An Automatic Mains Failure (AMF) panel, often referred to as an Automatic Transfer Switch (ATS) panel, is a crucial component in any backup power system. If you’ve ever wondered what is an AMF panel, it’s a device that automatically detects mains power failure and seamlessly switches the electrical load to a standby generator. Once mains power is restored, the AMF panel switches the load back to the main supply and safely shuts down the generator after a cooling period.