Vertiv Liebert PSA 800VA UPS 120VAC (PSA800MT3-120U)

The Vertiv Liebert PSA 800VA UPS 120VAC (PSA800MT3-120U) is an economical yet feature-rich line-interactive uninterruptible power supply designed to protect small office computers, home workstations, and essential electronics. This compact UPS delivers reliable battery backup, voltage regulation, and protection against power disturbances, helping keep critical devices online and data safe during outages, brownouts, and surges. Built for easy setup and everyday use, the PSA 800VA is an ideal balance between value and performance for budget-conscious environments that still require dependable power protection.

• AVR-enabled line-interactive design: Automatic voltage regulation corrects common mains voltage fluctuations without drawing from the battery, preserving battery life and extending runtime for lightly loaded equipment.
• 800 VA capacity for small office workloads: Provides sufficient backup for a typical desktop PC, monitor, and essential peripherals, giving you time to save work and shut down gracefully during outages.
• Comprehensive power protection: Surge protection, spike suppression, and noise filtering safeguard sensitive electronics from damaging power events and improve data integrity.
• Easy management and monitoring: USB connectivity supports safe unattended shutdown and power management via compatible software; LED status indicators and audible alerts keep you informed of battery status and power events.
• Space-saving, user-friendly design: Compact tower form factor fits neatly on a desk or shelf in tight spaces, making it an excellent choice for small offices, workstations, and home offices without sacrificing protection.

Technical Details of Vertiv Liebert PSA 800VA UPS 120VAC (PSA800MT3-120U)

• Model: PSA800MT3-120U
• Topology: Line-Interactive UPS with automatic voltage regulation (AVR)
• Output voltage: 120 VAC nominal
• Input voltage: 120 VAC nominal
• Capacity: 800 VA (backup power rating suitable for small office devices)
• Form factor: Compact tower designed for desktop or small office use
• Management interface: USB port for monitoring, configuration, and safe shutdown
• Protection: Battery-backed outlets plus surge protection and power conditioning
• Indicators: LED status indicators and audible alarms to signal power events and battery status
• Compatibility notes: Suitable for typical small office computers, routers, modems, and peripheral devices requiring backup power and protection

How to install Vertiv Liebert PSA 800VA UPS 120VAC (PSA800MT3-120U)

• Choose a stable, ventilated location near a 120 VAC wall outlet and away from heat sources or direct sunlight; avoid blocking airflow to the unit.
• Connect the UPS to a dedicated 120 VAC outlet using the included power cord; ensure the outlet can supply sufficient current for the intended load.
• Plug critical devices (such as a computer, monitor, and modem/router) into the UPS’s battery-backed outlets to ensure they stay powered during outages and provide safe shutdown timing if needed.
• Attach the USB cable to the UPS and to your computer to enable power management and safe shutdown features; install any included software or drivers if available from Vertiv.
• Allow the battery to fully charge before first use by leaving the UPS plugged in with no load for 8–12 hours; this helps establish an accurate runtime baseline and battery health.
• Test the system periodically by simulating a power interruption (briefly unplug devices) to verify automatic shutdown procedures work correctly and to understand the expected runtime under your workload.
• Practice good cable management: route power and data cables neatly, avoid daisy-chaining through power strips, and keep the UPS away from moisture and heavy traffic areas.
• Perform routine checks: monitor LED indicators, listen for alarms, and replace the battery according to the manufacturer’s recommendations to maintain optimal protection.

Frequently asked questions

• What devices can the PSA 800VA UPS protect? It is designed to protect essential electronics such as desktop PCs, monitors, keyboards, routers, modems, printers, and other small office devices from outages and voltage disturbances.
• Does it provide USB shutdown? Yes. The UPS includes USB connectivity to enable safe unattended shutdown and power management with compatible software.
• What is the expected runtime? Runtime depends on the load connected to the UPS. Lighter loads will yield longer backup time, while heavier workloads reduce the duration. Use the included software or estimation guidelines to approximate runtime for your specific setup.
• Is the PSA 800VA suitable for a home office? Absolutely. Its compact size, straightforward setup, and reliable protection make it a practical choice for home office environments and compact workstations.
• How should I maintain the unit? Keep the unit in a cool, dry location, perform periodic self-tests, ensure the battery is charging properly, and replace the battery as recommended by the manufacturer to maintain peak performance.
• Can I expand protection to additional devices? Yes, you can protect additional devices by connecting them to other UPS outlets or by adding a larger UPS if your load requires more backup capacity and longer uptime.
• What certifications or safety standards does it meet? Safety and compliance information is available from the manufacturer; check the listing for UL compliance and other regional safety certifications applicable to your region.