backup power

Auxiliary energy source

Backup power is electricity supplied by a secondary source when the main power fails.

It typically comes from generators, batteries, or uninterruptible power supplies (UPS).

Hospitals, data centers, and other critical facilities maintain backup power to prevent dangerous or costly outages: The backup power kicked in when the grid went down.

Opposites
primary vs. secondary power source

backup powermain power

primary source

power availability vs. absence

backup powerpower outage

Loss of electrical supply

power failure · blackout · power loss · outage · grid failure

Family

power, backup

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G