APC Smart-ups Ultra 3000VA 208+230V 1U with Lithium-ion Battery with Smartcon - SRTL3KRM1UWC

APC by Schneider Electric SRTL3KRM1UWC Smart-UPS Ultra 3kVA 1U Rack Online UPS with Lithium-Ion Battery

Overview

The APC by Schneider Electric SRTL3KRM1UWC is a 3000VA / 3000W online double-conversion rack UPS engineered for space-constrained server rooms, edge deployments, and critical infrastructure environments where a single rack unit is all you have to spare. Unlike line-interactive designs that only regulate voltage during sags and swells, the double-conversion topology means connected equipment never draws directly from the utility line — every watt passes through the inverter continuously, delivering true sine wave output regardless of what the grid is doing. That matters in commercial buildings with dirty power or generator-backed sites where switching transients are common.

The lithium-ion battery stack distinguishes this unit from conventional VRLA-based UPS platforms in the same class. Li-ion chemistry runs significantly lighter and longer between replacements than lead-acid, reducing lifecycle service costs and making the unit practical for wall-mount or overhead rack installations where weight budgets matter. The SRTL3KRM1UWC pairs that battery advantage with the SmartConnect cloud management port for remote monitoring without a separate NIC card.

Key Features

• Online Double-Conversion Topology: The inverter runs 100% of the time, so there is zero transfer time to battery during a utility outage — critical for servers, VoIP gateways, and any load that cannot tolerate even a 4–8ms gap. Line-interactive UPS units switch; this one never does.
• 3000VA / 3000W Output at Unity Power Factor: A 1.0 power factor rating means the VA and watt figures are identical — no derating calculation needed when planning load capacity. Size the UPS to your watt load directly.
• True Sine Wave Output: Active PFC power supplies in servers and network gear require a sine wave; the SRTL3KRM1UWC's inverter delivers it under all conditions, including full battery discharge. Square-wave or stepped approximations can trip PFC circuits offline.
• Lithium-Ion Battery: Li-ion packs charge faster, weigh less, and typically last 2–3x longer between replacements compared to VRLA. In a 1U form factor where VRLA cells compromise runtime to save space, Li-ion provides a meaningful runtime improvement for the same rack footprint.
• 1U Rack Form Factor, 208–240V Input: Fits standard 19-inch racks without a shelf adapter. Input voltage range of 208–240V covers both 208V three-phase-derived single-phase feeds common in data centers and 230V infrastructure in international or mixed deployments.
• Output Receptacles — C13 and C19: Five AC outlets cover both standard IEC C14-connected server PSUs (via C13) and high-draw C20-plugged equipment (via C19). No step-down cables or adapters required for mixed-density rack builds.
• 3:1 Crest Factor Tolerance: Handles loads with high inrush current — common with motors, drives, and older switching supplies — without fault-tripping or waveform clipping that would appear as noise on sensitive loads downstream.
• 50/60 Hz Input and Output: Frequency-agnostic operation supports both North American 60Hz infrastructure and 50Hz environments without manual jumper changes, useful for globally deployed edge racks or export configurations.
• USB 2.0 Management Port: The onboard USB port enables direct connection to a host server for graceful shutdown signaling via APC PowerChute software — no IP address required, useful for isolated rack environments without network access to the UPS.
• Audible Alarm System: On-battery, overload, and fault alarms give local indication without requiring active monitoring software — baseline safety for unmanned wiring closets and remote edge sites.
• 55 dB Noise Level: Appropriate for open office-adjacent server closets or shared spaces. Not whisper-quiet, but on par with active cooling in a typical 1U server — unlikely to be the loudest device in the rack.

Integration & Compatibility

The SRTL3KRM1UWC integrates into APC's APC by Schneider Electric ecosystem via the SmartConnect port, enabling cloud-based monitoring and firmware updates without a dedicated network management card. For environments requiring SNMP or Modbus integration into a BMS or DCIM platform, an optional network management card can be installed in the accessory slot — verify current-generation card compatibility with APC before ordering. USB connectivity supports APC PowerChute Network Shutdown for VMware, Windows, and Linux hosts. The C13/C19 outlet mix is compatible with standard server, storage, and networking power cords without adapters. For broader power protection planning, pair this unit with an APC rack PDU downstream if you need outlet-level switching or metering beyond what the UPS itself provides.

Frequently Asked Questions

Q: What is the topology of the SRTL3KRM1UWC — is it online double-conversion or line-interactive?

A: The SRTL3KRM1UWC uses online double-conversion (true online) topology. Connected loads always run from the inverter — there is no transfer time to battery during a power failure, making it suitable for servers and other equipment that cannot tolerate any gap in clean power.

Q: Does the SRTL3KRM1UWC output a true sine wave?

A: Yes. The unit produces a true sine wave under all operating conditions, including battery mode. This is required for servers and networking equipment with active PFC power supplies.

Q: What outlet types are on the SRTL3KRM1UWC and how many?

A: The unit provides five AC outlets: a mix of IEC C13 and IEC C19 couplers. C13 receptacles serve standard server and network gear power cords; C19 receptacles support higher-draw equipment using C20 plugs.

Q: Does the SRTL3KRM1UWC use lithium-ion or lead-acid batteries?

A: Lithium-ion. This results in a lighter unit, faster recharge times, and a longer expected battery service life compared to traditional VRLA (lead-acid) UPS platforms in the same class.

Q: What input voltage range does the SRTL3KRM1UWC support?

A: The unit accepts input voltages from 208V to 240V at 50 or 60 Hz, covering both 208V data center feeds and 230V commercial infrastructure without modification.

Q: How is the SRTL3KRM1UWC managed remotely?

A: The unit includes a USB 2.0 port for direct host connection and graceful shutdown via APC PowerChute software. It also includes a SmartConnect port for cloud-based monitoring. An optional network management card (sold separately) adds SNMP and Modbus integration for DCIM or BMS platforms.

Karl Wilson

The SRTL3KRM1UWC is the unit I reach for when a customer needs true online protection in a single rack unit and cannot justify the weight or replacement cycle of a VRLA platform. The lithium-ion battery chemistry is the real differentiator here — in dense 1U deployments where VRLA cells are physically cramped and degrade faster due to heat, the Li-ion stack holds up substantially longer between service intervals. Pair that with a unity power factor rating at 3000W and you eliminate the mental math that trips up a lot of rack planners who conflate VA with watts.

Technical Highlights:

• Double-Conversion, Zero Transfer Time: The inverter runs continuously — no 4–8ms relay switching that line-interactive units introduce. For hypervisors running multiple VMs or NVR servers writing to disk, that gap matters.
• 3:1 Crest Factor: Tolerates high-inrush loads like PTZ camera arrays or switching-supply-heavy racks without tripping the overload circuit — useful in security infrastructure closets with mixed load profiles.
• C13 + C19 Outlet Mix: Five outlets covering both cord types means you can directly power a mix of 1U servers (C14 input) and higher-draw storage or networking gear (C20 input) off one UPS without a separate PDU in every deployment.

Deployment Considerations:

• Input is 208–240V only — this unit will not work on a standard 120V North American branch circuit. Confirm your rack feed voltage before ordering; a 208V single-phase or 230V feed is required.
• The BS1363A power plug listed in specs is a UK-standard plug. Verify the correct regional input cord or input hardwire configuration for your installation — the plug type signals this unit may ship in a configuration intended for non-North-American grid infrastructure.

This unit is well-suited for edge data center racks, security operations center equipment rooms, and telecom closets running on 208V or 230V feeds where the replacement-battery burden of VRLA is a real operational cost — and where a single rack unit is not a preference but a constraint.