APC Smart-ups Lithium ION 1500VA Short Depth RM 120V Smartconnect Taa-compliant - SMTL1500RM3UCUS

APC by Schneider Electric SMTL1500RM3UCUS Short-Depth 1500VA Lithium-Ion Rack UPS

Overview

The APC Smart-UPS SMTL1500RM3UCUS is a 1500VA / 1350W lithium-ion rack UPS built for IT closets, edge deployments, and security infrastructure rooms where cabinet depth is a real constraint. At just 11.89 inches deep, it slides into shallow 2-post racks and wall-mount enclosures that would reject a conventional deep-chassis UPS — without sacrificing runtime, battery longevity, or management capability. TAA compliance makes it a viable option for government and federally funded projects where product origin requirements apply.

Lithium-ion chemistry changes the service math significantly compared to traditional VRLA UPS units. Where a lead-acid battery typically needs replacement every 3–4 years, the SMTL1500RM3UCUS carries an expected battery life of 5 to 10 years — roughly two replacement cycles avoided. For distributed or hard-to-reach deployments, that difference directly reduces maintenance overhead and total cost of ownership.

Key Features

• 1350W / 1500VA Output Capacity: Handles a loaded edge server, a small NVR stack, or a combination of PoE switches and security appliances within a single UPS. The 1.35kW real-power ceiling is the number to match against your actual connected load — not the VA rating.
• Lithium-Ion Battery, 5–10 Year Expected Life: Eliminates the 3–4 year VRLA replacement cycle common in traditional rack UPS units. For remote IDF closets or branch offices with limited on-site support, fewer battery replacements mean fewer emergency service calls and lower lifecycle cost.
• 2-Hour Typical Recharge Time: After a discharge event, the unit returns to full battery capacity in approximately 2 hours — faster than most VRLA alternatives, which reduces your vulnerability window during consecutive outages or extended testing.
• 11.89-Inch Shallow Depth: Fits in wall-mount enclosures, 2-post open-frame racks, and shallow cabinets where standard 18–24 inch UPS units physically cannot go. This is the primary reason to choose this model over a conventional Smart-UPS.
• Pure Sine Wave Output: Delivers utility-grade sine wave power on battery — not stepped approximation. Active PFC power supplies (found in most modern servers, NVRs, and network equipment) require true sine wave to operate correctly on battery; a simulated sine wave UPS can cause those loads to shut down or behave erratically.
• 6ms Typical / 10ms Maximum Transfer Time: Transfer from utility to battery happens fast enough that virtually all IT and security equipment — servers, switches, NVRs, IP cameras with local buffering — will ride through the transition without resetting or dropping connections.
• 680-Joule Surge Energy Rating with Full-Time Noise Filtering: Suppresses surges up to 680 joules and continuously filters line noise with zero clamping response time. The 0.3% IEEE surge let-through rating means nearly all surge energy is absorbed before it reaches connected equipment.
• SmartConnect & Multi-Interface Management: RJ-45 serial, USB, and Smart-Slot interfaces allow integration with building management systems, PowerChute software, and third-party SNMP management cards. SmartConnect enables cloud-based UPS management without a dedicated network management card for sites where that simplifies deployment.
• Multi-Function LCD Control Panel: Displays runtime remaining, load percentage, input/output voltage, and battery status from the front panel — no software login required for a quick status check during an incident or audit.
• Configurable Audible Alarms: On-battery and low-battery alarms are configurable for delay, which is useful in noisy equipment rooms or deployments where alarm fatigue is a concern.
• TAA Compliant: Meets Trade Agreements Act requirements, making it eligible for GSA Schedule purchases and federal contracts where domestic or TAA-country-of-origin sourcing is mandated.
• Operating Range 32°–104°F (0°–40°C), 0–95% RH Non-Condensing: Covers standard commercial equipment room conditions. The 10,000-foot (3,000m) elevation ceiling accommodates high-altitude installations such as mountain campus facilities or certain government sites.

Integration & Compatibility

The Smart-Slot expansion bay accepts APC network management cards, enabling SNMP/web-based remote monitoring and integration with platforms such as Data Center Expert, EcoStruxure IT, and most NMS environments that support APC MIBs. The USB and RJ-45 serial ports support PowerChute Business Edition and PowerChute Network Shutdown for graceful OS-level shutdown of connected servers before battery depletion. The SMTL1500RM3UCUS holds CSA C22.2 No. 107.3, UL 1778, and UL 1973 certifications, confirming it meets North American safety standards for UPS equipment and lithium-ion battery systems specifically. FCC Part 15 Class A compliance qualifies it for commercial installations without additional RF emissions mitigation.

What's in the Box

• 1x APC Smart-UPS SMTL1500RM3UCUS unit
• 1x Rack mounting support rails
• 1x Smart UPS signalling RS-232 cable
• 1x USB cable
• 1x Installation guide
• 1x CD with software
• 1x Documentation CD

Frequently Asked Questions

Q: Is the SMTL1500RM3UCUS TAA compliant?

A: Yes. The SMTL1500RM3UCUS carries TAA (Trade Agreements Act) compliance, making it eligible for GSA Schedule purchases and federal procurement where country-of-origin requirements apply.

Q: How long does the lithium-ion battery last before replacement?

A: APC specifies an expected battery life of 5 to 10 years for the lithium-ion pack in the SMTL1500RM3UCUS — significantly longer than the 3–4 year cycle typical of VRLA lead-acid UPS batteries.

Q: Does this UPS output a true sine wave on battery?

A: Yes. The SMTL1500RM3UCUS produces a pure sine wave output on battery. This is required for loads with active PFC power supplies — including most modern servers, NVRs, and managed switches — which can fault or shut down when fed a stepped sine wave approximation.

Q: What is the actual depth of the SMTL1500RM3UCUS?

A: The unit measures 11.89 inches (302mm) deep, making it compatible with shallow wall-mount enclosures and 2-post open-frame racks where standard 18–24 inch deep UPS units will not fit.

Q: What management interfaces are available?

A: The SMTL1500RM3UCUS provides an RJ-45 serial port, USB, and a Smart-Slot expansion bay. SmartConnect enables cloud-based monitoring out of the box. An optional APC network management card installed in the Smart-Slot adds SNMP/web remote management.

Q: How quickly does the battery recharge after a discharge event?

A: Typical recharge time is 2 hours. This is faster than most VRLA alternatives and reduces the window of reduced protection following an outage or a planned battery test.

Eden Phillips

The spec that defines the SMTL1500RM3UCUS's deployment niche is the 11.89-inch chassis depth, not the lithium-ion chemistry — though both matter. Most Smart-UPS competitors at this capacity class run 17–20 inches deep, which immediately rules them out for wall-mount enclosures and shallow 2-post racks that are standard in IDF closets and edge security deployments. This unit fits where others don't, and the lithium-ion battery extends the service interval enough to make it worth specifying even when depth isn't the constraint.

Technical Highlights:

• 5–10 Year Battery Life: Compared to a VRLA battery at roughly 3–4 years, you're eliminating at least one full replacement cycle — and potentially two — over a 10-year installation. At distributed sites, battery replacement logistics cost more than the battery itself; this spec reduces that exposure directly.
• 2-Hour Recharge: After a full discharge, the unit is back to 100% capacity in approximately 2 hours. For sites with recurring short outages (utility grid instability, generator transfer switching), this recharge speed keeps you protected through the next event rather than sitting at 40% capacity when the grid drops again.
• 680-Joule Surge Rating, Zero Clamping Response: The 0.3% IEEE surge let-through is a meaningful spec in environments near HVAC compressors, elevator motor rooms, or other inductive load sources that generate line transients. Most surge suppressors respond in nanoseconds but clamp at a percentage — this unit clamps at essentially zero response time with a 680J absorption capacity.

Deployment Considerations:

• Smart-Slot is occupied by default with no card installed — budget for an AP9641 or similar network management card if you need SNMP polling or remote outlet control; SmartConnect handles basic cloud visibility but won't feed your NMS without a card.
• At 43 lbs, this is a two-person rack installation. The included rails are required — do not attempt to shelf-mount a 43-lb unit with standard cage nuts. Also confirm your rack's weight rating before adding this to an already-loaded shallow enclosure.

The SMTL1500RM3UCUS is the right call for a TAA-required federal edge deployment — a guard station, an outdoor cabinet controller, or a campus IDF — where you need a 3U lithium-ion UPS that physically fits in a 12-inch-deep enclosure and won't require battery service for years. It's not the lowest-cost path for a standard deep rack; use it where the depth constraint and the reduced battery maintenance cycle justify the premium over conventional VRLA alternatives.