This read-only display string reports the alarm-level indication, sourced from the BDA1 alarm point, that the Dc1 plant's batteries are on discharge, complementing the separate battery-on-discharge status field with a dedicated alarm signal. It gives the admin an alarm-list entry specifically for the batteries-on-discharge condition, useful for systems that page or log only active alarms rather than polling every status field. For example, a monitoring system configured to alert only on active alarms would rely on this BDA1-sourced field to notify staff that the plant has switched to battery power.