APC BE500G3 – 500 VA Standby UPS Battery Backup

Overview

The APC BE500G3 is a standby uninterruptible power supply (UPS) providing temporary battery continuity and surge protection for essential electronics such as desktops, networking gear, and AV equipment in small office and home environments. It maintains output when utility power fails, enabling orderly system shutdowns and bridging short outages. The unit incorporates ENERGY STAR efficiency compliance.

This UPS delivers 500 VA / 300 W capacity with 120 V AC nominal input/output. Standby topology switches to battery support within milliseconds when mains voltage deviates beyond acceptable thresholds, with stepped approximation to sine wave output typical of passive stand‑by systems.

The enclosure supports placement on floors or wall mounting via keyhole slots, making it suitable for constrained spaces near workstations or network closets. Six total receptacles are included: four provide both battery backup and surge protection, and two provide surge‑only protection to segregate critical and non‑critical loads.

Integrated USB‑A and USB‑C ports deliver 5 V DC, 3 A auxiliary charging for mobile devices without drawing from UPS runtime capacity. Internal LED indicators and audible alarms communicate utility status, battery mode, and fault conditions to operators managing connected systems.

The sealed lead‑acid battery is maintenance‑free and recharges automatically when mains power returns, with typical recharge time around 8 hours following a full discharge cycle. Runtime varies with load, offering several minutes at moderate loads to enable safe orderly shutdown procedures.

Key Features

• 500 VA / 300 W standby UPS with stepped sine wave output
• Four battery‑backup + surge outlets; two surge‑only outlets
• Dual USB‑A and USB‑C charging ports (5 V DC)
• Floor or wall‑mountable compact design
• Maintenance‑free sealed lead‑acid battery with ~8 h recharge