Up to 8 hours of continuous 2–8°C operation, under typical clinic conditions (low door-open frequency, normal ambient temperature). That covers the vast majority of utility grid interruptions, including overnight failures, planned maintenance windows, and most winter storm events. If the outage extends beyond the UPS runtime, the unit will alert you through its audible and visual alarms before battery depletion. For locations with frequent multi-day outages, pair with a generator transfer switch — the TG unit recharges automatically when generator power kicks in.