Emergencies and power failures often arrive together. A fire, a flood or a fault can cut mains power at exactly the moment the building most needs to tell people what to do. A voice-alarm system therefore carries its own standby power so it keeps working regardless.
What standby power provides
Batteries, sized to standards, keep the voice-alarm system running for a defined period, in quiescent standby and then in full alarm, after mains power is lost, so announcements continue through an evacuation.
What the design must get right
- Battery capacity sized for the required standby and alarm durations
- Continuous monitoring of battery health and charging
- Fault reporting if batteries degrade or fail
- Regular testing and timely battery replacement
Not a set-and-forget item
Batteries age and must be tested and replaced on schedule. A voice-alarm system that reports its own battery condition, and is maintained properly, is one you can rely on when the lights go out.
Related: Public Address & Voice Evacuation
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