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

The requirement for a backup battery to be fully recharged after power is restored to the panel is established to ensure the reliability and effectiveness of the alarm system. Typically, a period of 48 hours is standard because it allows sufficient time for the battery to reach a full charge under normal operating conditions. This timeframe is essential to ensure that in case of a power outage or failure, the system can reliably function without interruption. A battery that takes a longer time to recharge could create vulnerabilities in the system, leaving it unprotected for longer periods. Therefore, the guideline for a 48-hour recharge time reflects the balance between system readiness and operational efficiency, which is critical in ensuring that alarm systems maintain their integrity and functionality at all times.