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Compact black tower UPS with LCD screen and eight NEMA outlets

APC

APC BX850M UPS 850VA 510W 120V 8 NEMA outlets

SKU CH-AG6P-HFPPR MPN BX850M

Provides 850 VA / 510 W battery backup with AVR, LCD status, USB management and 1103 J surge protection across eight NEMA outlets

  • Voltage version120 V
  • AC input voltage88 -139 V
  • Input line frequency60 Hz +/- 3 Hz
  • Power inputNEMA 5-15P
  • Volt-ampere rating850 VA
  • Power rating510 W

VA 850 VA / 510 W

  • 850 VA / 510 W capacity protects workstations and networking gear
  • Automatic Voltage Regulation corrects brownouts without draining the battery
  • Eight NEMA 5-15R outlets — four with battery backup, four surge-only
  • LCD status screen plus USB port for PowerChute monitoring and graceful shutdown
  • 1,103-joule surge rating plus RJ-45 and coax protection for data lines

Compact Tower UPS for Home and Small Business

The APC BX850M is an 850 VA, 510 watt battery backup designed to protect computers, networking gear and entertainment systems from outages, surges and voltage fluctuations. Its compact tower form factor fits on a desk or shelf while providing eight NEMA 5-15R outlets, four of which deliver battery-backed power with automatic voltage regulation.

Stepped Sine Wave Output with AVR and USB Management

In normal operation the unit corrects input voltages between 88 and 139 V without using the battery, preserving runtime for actual blackouts. The stepped approximated sine wave output keeps attached equipment running during an outage, while the USB port enables monitoring and graceful shutdown through PowerChute Personal Edition software. Surge protection is rated at 1103 joules for both AC and data lines.

2.1 Minutes Runtime at Full 510 Watt Load

At maximum rated load the sealed lead-acid battery provides 2.1 minutes of backup, extending to 8.9 minutes at half load, with a 12 hour recharge cycle. This runtime profile suits users who need just enough time to save work and shut down safely, not those who require extended operation through long outages. Buyers needing longer runtimes at high loads should consider higher-capacity units.

How it compares

Measured against everything we stock in Uninterruptible Power Supplies (UPS), at today’s prices. Recalculated every night.

Price $141.99
Cheaper than about 86% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameAPC
Product lineBack UPS Pro
Model nameBX850M
Ports & slots
Communication portsUSB
Protected data linesNetwork line - 10 / 100 / 1000 Base-T Ethernet (RJ-45 connector)
Coaxial cable for CATV / SATV / modem / Audio-Video (coax connector)
Power
Voltage version120 V
AC input voltage88 -139 V
Input line frequency60 Hz +/- 3 Hz
Power inputNEMA 5-15P
Volt-ampere rating850 VA
Power rating510 W
Voltage output120 V
AC output frequency60 Hz
Power outlets8
Battery typeSealed Lead Acid
Runtime on batteryAt Full load: 2.1 minutes
At half load: 8.9 minutes
Battery charge time12 Hour(s)
Surge protection rating1103 Joules
Size & build
Product dimensions7.48 in × 3.58 in × 12.2 in
Product weight14.99 lb (6.8 kg)
Shipping weight7.68 kg
Package size437 × 251 × 147 mm
Environment & compliance
Regulatory approvalsCalifornia (CEC) Battery Charger, ENERGY STAR (USA), FCC Part 15 Class B, UL 1778

Other versions of this model

4 more in the same range

Questions about this item

How do I connect the USB cable so PowerChute can shut down my PC before the battery runs out?

Plug the USB cable into the UPS and your computer, install PowerChute Personal Edition, then configure the shutdown timer to trigger well before the 2.1 minutes at full load or 8.9 minutes at half load.

When will the sealed lead acid battery need replacing and how long does a full recharge take?

Expect three to five years of service; after a complete discharge the battery requires 12 hours to reach full charge again.

What happens if my equipment draws more than 510 watts during an outage?

The UPS will trip its overload protection and cut output because 510 watts is the maximum real power the inverter can supply.

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