APC by Schneider Electric SRT8KXLT-5KTF 8kVA Online Double-Conversion UPS with Integrated Step-Down Transformer

Overview

The SRT8KXLT-5KTF is an 8 kVA / 8000 W double-conversion online UPS from APC by Schneider Electric, built for facilities that run 208/240V distribution infrastructure but need to power 120V loads — surveillance servers, network equipment, workstations, or mixed-voltage IT racks — without sourcing a separate step-down transformer. The integrated 208/240V-to-120V step-down transformer is built into the chassis, which means fewer SKUs to manage, cleaner rack wiring, and one less point of failure in your power chain.

This is a online double-conversion UPS — not line-interactive, not standby. At 8000 VA output capacity, it continuously regenerates output power from the inverter rather than switching from bypass under fault conditions. Your loads never see raw utility power. For network video recorders, storage arrays, or access control servers where a 20ms transfer gap causes a system restart, that distinction matters.

The unit accepts input from 100V to 275V at 40–70 Hz, making it compatible with variable international utility feeds and generator sources that commonly drift outside tight tolerances. Output frequency locks at 50 or 60 Hz regardless of input variation — important when powering frequency-sensitive loads alongside battery-backed computing equipment.

Key Features

• Double-Conversion Online Topology: The inverter is always in the power path. Unlike line-interactive designs that only regulate voltage, double-conversion completely isolates loads from input anomalies — frequency drift, voltage sags, surges, and harmonic distortion from generators or industrial equipment. If your deployment is adjacent to HVAC compressors, elevators, or variable-frequency drives, this topology is non-negotiable.
• 8000 VA / 8000 W Output at Unity Power Factor: A 1:1 VA-to-watt ratio means the published wattage is the actual deliverable wattage — no derating calculation needed. You can load this unit to 8 kW of real power without hitting a volt-ampere ceiling first. Size your battery runtime accordingly.
• Integrated 208/240V-to-120V Step-Down Transformer: Facilities wired for 208V or 240V three-phase or split-phase distribution can power 120V IT and security loads directly from this unit. Eliminates the cost and rack space of a standalone autotransformer, and keeps the voltage conversion inside the UPS's isolation barrier rather than downstream of it.
• True Sine Wave Output at 2% THD: Output voltage total harmonic distortion is held to 2% — well below the 5% threshold that begins to cause reliability issues in active power factor correction (APFC) power supplies common in servers and NVRs. Simulated sine wave UPS units (stepped approximation) can cause APFC supplies to run hot or trip; this unit won't.
• 3:1 Crest Factor Tolerance: Handles loads with high peak-to-RMS current ratios — typical of switched-mode power supplies — without clipping or overloading the inverter. Medical-grade monitors, laser printers, and modern computing loads routinely draw crest factors of 2.5:1 to 3:1. This unit is sized for those peaks.
• Wide Input Voltage Range — 100V to 275V: The UPS accepts input across a 175V window, so it can operate correctly on nominal 120V, 208V, 220V, or 240V utility feeds without reconfiguration. Generator sources that swing ±20% of nominal still fall within the operating envelope, reducing unnecessary battery switchovers during generator run events.
• 480 J Surge Energy Rating: 480 joules of surge suppression handles most utility-side transients without switching to battery. For sites near industrial equipment or with frequent lightning activity, this provides a first line of defense before clamping voltages reach the inverter.
• Web-Based Management: Remote monitoring and control via web interface means you can check runtime estimates, load percentage, battery health, and alarm status without physical access to the equipment room. Integrate into your NOC or BMS for centralized power visibility across multiple UPS units.
• Auto-Restart: After a utility outage depletes the battery and power returns, the unit restarts automatically and restores output to loads without manual intervention. For unstaffed remote sites — edge surveillance nodes, unmanned guard stations, remote access control panels — this eliminates a truck roll after an extended outage.
• 55 dB Noise Level: Audible noise is rated at 55 dB, which is in the range of a normal conversation. This unit is not silent — plan placement accordingly in open-plan offices or quiet server rooms. Wiring closets and dedicated UPS alcoves are appropriate environments.

Integration & Compatibility

The SRT8KXLT-5KTF is part of the APC Smart-UPS SRT line, which supports APC's EcoStruxure IT ecosystem for remote monitoring, runtime graphing, and predictive battery replacement alerts. The broad input frequency range (40–70 Hz) makes this unit compatible with variable-speed generator sets, which is a common requirement in remote deployments where utility backup is a generator rather than grid secondary. For deployments running PoE network switches, IP cameras, and NVRs off a centralized power circuit, this UPS protects the entire downstream chain in a single unit rather than requiring per-rack or per-device UPS units.

The SRT8KXLT-5KTF (often searched as SRT8KXLT 5KTF) is appropriate for data center edge rows, mid-size security operations centers, and mixed-load server rooms where 208V distribution feeds 120V IT equipment. It is not a rack-mount unit by default — verify form factor compatibility with your cabinet before ordering if rack integration is required.

Frequently Asked Questions

Q: What is the difference between the SRT8KXLT-5KTF and a standard SRT8KXLT?

A: The