Though that doesn't match very well with "uninterruptible power supply units can be engaged for certain functions". It sounds worded to convey that the UPS is l

Though that doesn't match very well with "uninterruptible power supply units can be engaged for certain functions". It sounds worded to convey that the UPS is limited in some way. An interesting old summary of their 2012 us-east-1 incident with power/generators/ups/switching: https://aws.amazon.com/message/67457/ https://aws.amazon.com/message/67457/