APC Smart-ups On-line - UPS - Rack/tower - 12 NEMA 5-20R 4 NEMA L6-20R 1 NEMA L6 - SRT8KRMXLT-5KTF

APC by Schneider Electric SRT8KRMXLT-5KTF 8kVA Online Rack/Tower UPS

Overview

The SRT8KRMXLT-5KTF is an 8 kVA / 8000 W double-conversion online UPS from APC by Schneider Electric built for rack or tower deployment in environments where power quality directly affects uptime — think edge data closets, surveillance server rooms, and critical IT infrastructure that can't tolerate a millisecond of switchover time. Unlike line-interactive designs that only engage the inverter on brownouts, double-conversion topology means your load runs off clean, inverter-generated sine wave power 100% of the time, with the utility input constantly recharging the battery bank. Every voltage spike, harmonic distortion wave, and frequency deviation from the grid is stripped before it reaches your equipment. That's the argument for double-conversion when you're protecting 8 kilowatts of network video recorders, servers, and managed switches in a commercial installation.

Key Features

• Double-Conversion (Online) Topology: Zero transfer time to battery because your load never leaves the inverter. For surveillance NVRs or storage arrays mid-write during a power event, this is the difference between a clean ride-through and a corrupted recording. No "transfer time" spec to worry about.
• 8 kVA / 8000 W Output Capacity: At unity power factor, this UPS delivers its full 8000 W — uncommon at this class. Size a system protecting four 2U NVRs, a core switch stack, and patch panel infrastructure and you're using the capacity intentionally rather than leaving headroom you'll never use.
• True Sine Wave Output: Active power factor correction loads (virtually all modern server PSUs and NVR power supplies) require true sine wave to operate correctly. Modified sine wave units cause audible transformer hum and can stress PSU capacitors. The SRT8KRMXLT-5KTF produces a pure sine wave with output THD below 2% — low enough that even the most sensitive audio-visual or measurement equipment won't register distortion artifacts.
• Wide Input Voltage Window (100–275 V): The unit accepts input across 100 V to 275 V, which covers single-phase 120 V, 208 V, and 240 V utility feeds. In mixed North American commercial buildings where nominal voltages vary by floor or panel, this range prevents unnecessary battery cycling during brownout events and extends battery service life.
• 208 V Output: Output is configured for 208 V — the standard for rack-mounted server and NVR equipment in North American commercial installations. Match this to your PDU and equipment input specs before ordering; this is not a 120 V output unit.
• Emergency Power Off (EPO): EPO support lets a remote switch or building management system cut UPS output instantly in a fire or emergency. Required by NEC and many local codes for UPS systems above a certain kVA threshold in occupied spaces. This is a compliance checkbox for most commercial installs.
• Hard Wire + NEMA Outlet Mix: Output includes a hard-wire 3-wire (2PH + G) terminal, NEMA 5-20R receptacles, NEMA L6-20R receptacles, and a NEMA L6-30R receptacle. The hard-wire option handles in-rack PDUs wired directly to the UPS. The L6-20R and L6-30R twist-lock receptacles suit 208 V equipment with locking connectors — meaningful in vibration-prone or high-traffic environments where accidental disconnection is a real risk.
• 3:1 Crest Factor Tolerance: A 3:1 crest factor rating means the UPS handles highly non-linear loads — switched-mode power supplies, VFDs, UPS-downstream PDUs — without clipping or waveform degradation. Equipment-heavy racks with diverse load types won't cause the UPS to output distorted waveforms back to connected gear.
• 480 J Surge Energy Rating: Surge protection is integrated at 480 joules, adequate for transient suppression on the input side. This complements — but does not replace — panel-level surge protection for large commercial installations.
• Web-Based Management: Onboard web management enables remote monitoring of load, battery runtime, input voltage, and alarm status without requiring a separate network management card for basic visibility. For multi-site deployments, this simplifies status checks across locations.
• Auto-Restart: Following a utility outage that exhausts the battery, the UPS will automatically restart when utility power returns. Unattended edge sites — remote surveillance closets, unmanned guard posts, remote IDF rooms — stay online without requiring a truck roll to press the power button.
• 55 dB Operating Noise: Double-conversion UPS units run their inverter continuously, and fan noise is a real concern in open-plan or low-noise environments. At 55 dB, this unit is appropriate for equipment rooms but noticeable in quiet office spaces — factor this into location planning.

Integration & Compatibility

The SRT8KRMXLT-5KTF fits standard 19-inch rack enclosures in rack-mount orientation or deploys as a tower unit on the floor. The 208 V output is matched to most commercial-grade network video recorders, managed PoE switches, and server hardware specced for North American data center environments. Verify that your NVRs and switches specify a 200–240 V input range — most rack-mount equipment does, but consumer-grade gear may be 120 V only. The EPO terminal integrates with building automation systems and fire suppression control panels via a dry-contact circuit. Web management integrates with SNMP-capable monitoring platforms for alert forwarding and remote visibility into battery health and load percentage. For deployments requiring deeper monitoring or runtime graphing, APC's network management card ecosystem (sold separately) extends capability through the UPS's management slot.

Frequently Asked Questions

Q: What is the output voltage of the SRT8KRMXLT-5KTF?

A: The SRT8KRMXLT-5KTF outputs 208 V AC. This is a commercial-grade unit intended for North American rack installations where equipment is rated for 200–240 V input. It is not a 120 V output unit.

Q: Does the SRT8KRMXLT-5KTF support Emergency Power Off (EPO)?

A: Yes. The unit includes an EPO terminal that allows a remote switch or building management system to cut UPS output instantly. This is required by code in many commercial installations above certain kVA thresholds.

Q: What outlet types does the SRT8KRMXLT-5KTF provide?

A: The unit provides a hard-wire 3-wire (2PH + G) terminal, multiple NEMA 5-20R receptacles, NEMA L6-20R receptacles, and a NEMA L6-30R receptacle — covering both directly wired PDUs and twist-lock 208 V loads.

Q: Is the SRT8KRMXLT-5KTF a true online double-conversion UPS?

A: Yes. It uses double-conversion (online) topology, meaning the connected load runs from the inverter 100% of the time. There is no transfer time to battery during a power event — the load never touches raw utility power.

Q: What is the output THD of the SRT8KRMXLT-5KTF?

A: Output voltage Total Harmonic Distortion is rated below 2%, making it suitable for sensitive electronics, active PFC power supplies, and precision equipment that requires clean sine wave power.

Q: Can the SRT8KRMXLT-5KTF restart automatically after a power outage?

A: Yes. The auto-restart feature brings the UPS back online automatically when utility power is restored after a full battery discharge event, without requiring manual intervention — important for unattended remote installations.

James Everett

The SRT8KRMXLT-5KTF is the unit I specify when a customer needs 8 kW of protected power at 208 V with zero transfer time and a hard-wire output option — typically a mid-size surveillance server room or an edge data closet supporting NVRs, core switching, and an access control head-end under one roof. The double-conversion topology and sub-2% output THD are the specs that matter most here; everything else is confirmation that the unit is built for commercial infrastructure, not branch-office UPS duty.

Technical Highlights:

• Sub-2% Output THD: At full 8000 W load, output distortion stays below 2%. Modern NVR power supplies and server PSUs with active PFC are sensitive to waveform quality — sustained high THD from a UPS causes audible noise and can degrade PSU efficiency or lifespan. This unit eliminates that variable.
• 100–275 V Input Range: The wide input window prevents the unit from switching to battery during utility brownouts that stay above 100 V. In older commercial buildings where nominal 208 V can sag to 185–195 V under load, this prevents premature battery cycling and extends the battery bank's service life significantly.
• 3:1 Crest Factor: A 3:1 crest factor tolerance matters when your protected rack contains a mix of switching power supplies, PoE injectors, and storage arrays — all drawing highly non-linear current. Lesser UPS designs clip crest factor loads and produce distorted output waveforms; this unit handles them cleanly.

Deployment Considerations:

• The 208 V output is not adjustable to 120 V. Confirm every piece of connected equipment has a 200–240 V rated input before committing to this unit — mixing in any 120 V-only gear requires a step-down transformer on that branch, adding cost and a single point of failure.
• At 55 dB continuous operating noise, this unit is appropriate for dedicated equipment rooms but is noticeable in open office or low-ambient environments. Plan the install location accordingly — double-conversion fans run full-time, not just on battery.

This is the right unit for a hardwired 208 V surveillance or IT infrastructure closet in a commercial building where the facility manager requires EPO integration with the fire panel and the integrator needs zero-transfer-time power protection across a mixed load of NVRs, managed switches, and access control hardware.