How soon is a backup battery required to be fully recharged after power is restored to the panel?

A backup battery is a crucial component of a burglar alarm system, providing power in the event of an outage. According to industry standards and guidelines, once power is restored to the alarm panel after an outage, the backup battery must be fully recharged within a specified timeframe to ensure that it is ready for future use.

The correct timeframe is 48 hours. This requirement ensures that the backup system is adequately prepared to take over again in the event of another power failure. A longer recharge period could leave the system vulnerable, as it would not be able to respond effectively to another outage. Therefore, the 48-hour requirement allows for both efficiency and reliability in maintaining the security system's readiness.

In contrast, 24 hours may not provide sufficient time for a complete recharge, depending on the battery's capacity and discharge level. Similarly, 72 hours or one week could result in delays that compromise the system's readiness, which is why they are not appropriate choices. The industry standard emphasizes quick recovery and preparation for unexpected situations, aligning with the 48-hour requirement.