In an era where data centers and critical IT infrastructure demand zero tolerance for power disruptions, the APC Smart-UPS SRT5KXLI stands out as a premium double-conversion online UPS. This 5000VA/4500W tower/rackmount unit (3U form factor) delivers unwavering protection through its high-density design, ensuring clean, regulated power even in the harshest electrical environments. Ideal for enterprise servers, telecom equipment, and edge computing setups, the SRT5KXLI combines scalability, efficiency, and intelligent management to minimize downtime risks. As of October 2025, it remains a go-to for professionals seeking robust, future-proof power solutions. Let’s unpack its capabilities.
Key Specifications at a Glance
The SRT5KXLI is engineered for precision, with a hardwired input and versatile output options tailored for global deployments. Here’s a snapshot of its core attributes:
| Specification | Details |
|---|---|
| Capacity | 5000 VA / 4500 W |
| Input Voltage | 230 V nominal; adjustable 100–275 V (half load); 40–70 Hz auto-sensing |
| Output Voltage | 230 V (configurable: 220 V, 240 V) |
| Outlets | 6x IEC 60320 C13, 4x IEC 60320 C19 (plus 2x IEC jumpers for daisy-chaining) |
| Waveform | Pure sine wave (<2% harmonic distortion) |
| Transfer Time | 0 ms (double-conversion online) |
| Efficiency | Up to 94% online / 98% eECO mode |
| Surge Protection | 480 Joules; full-time EMI/RFI filtering |
| Battery Type | Sealed lead-acid VRLA (192 VDC, APCRBC140 cartridge) |
| Recharge Time | 1.5 hours typical |
| Dimensions (H x W x D) | 13.2 x 43.2 x 71.9 cm (3U rack/tower convertible) |
| Weight | 54.43 kg (120 lb) |
| Operating Temp | 0–40°C (32–104°F); 0–95% humidity, non-condensing |
| Warranty | 2 years (repair or replace, excluding battery) |
These specs make it a powerhouse for loads up to 4500W, with certifications like CE, EAC, and VDE ensuring compliance worldwide.
Standout Features That Deliver Enterprise-Grade Protection
The “SRT” in its name signifies Superior Runtime and Topology—online double-conversion that continuously conditions power, isolating your equipment from all grid anomalies. Unlike line-interactive models, it boasts zero transfer time, frequency regulation (±3 Hz sync to mains), and a 3:1 crest factor for handling inrush currents without strain.
Scalable Runtime and Battery Intelligence
At its core is intelligent battery management with precision temperature-compensated charging, extending VRLA battery life to 3–5 years. The included APCRBC140 pack provides baseline runtime, but scalability shines with optional SRT192BP external packs (up to 10 strings for 17,745 VAh). Automatic self-tests and predictive replacement alerts keep you proactive.
Advanced Monitoring and Control
Pre-installed Network Management Card 3 (with environmental monitoring) enables remote access via Web/SNMP, plus USB/RS-232 ports for PowerChute software integration. The multi-function LCD console displays real-time stats like load, runtime, and events, with audible/visible alarms prioritized by severity. An EPO port adds safety for data centers.
Eco-Friendly Efficiency
As a Green Premium product, it achieves 94% efficiency in online mode and up to 98% in eECO (high-efficiency) mode, reducing energy costs and heat output to just 931 BTU/h. It’s REACH and RoHS compliant, with a low carbon footprint of 11,178 kg CO2 eq over its lifecycle.
Users rave about its quiet operation at 55 dBA, making it suitable for office-adjacent racks, though some note the need for occasional firmware updates for optimal network card performance.
Performance in Action: Runtime and Real-World Reliability
Runtime is where the SRT5KXLI flexes its scalability. At full load (4500W), it delivers about 4–5 minutes—ample for safe shutdowns. Half load (2250W) extends to 12–13 minutes, while lighter draws shine: 1000W yields 31 minutes, and 500W pushes over an hour. With one SRT192BP pack added, those figures multiply—e.g., 1000W jumps to 1 hour 51 minutes.
Real-world tests confirm these claims: In a 2025 review of a Nigerian deployment, it bridged a 10-minute outage for a server cluster without a hitch, thanks to its stable sine wave output preventing reboots. However, one homelab user reported initial low runtime (16 minutes at full) due to a faulty OEM battery, resolved with a replacement—highlighting the importance of annual self-tests. Overall, efficiency holds steady at 92–94% under load, with minimal harmonic distortion ensuring compatibility with PF-corrected PSUs.
Easy Setup and Maintenance Tips
Deployment is user-friendly: Secure it in a 19-inch rack (kit sold separately) or stand as a tower with included feet. Hardwire the 3-wire input (1P + N + E), connect loads to C13/C19 outlets, and plug in the temperature probe for optimized charging. PowerChute setup takes minutes for automated notifications and graceful shutdowns.
Maintenance involves quarterly self-tests via the LCD (or runtime calibration for load changes), with hot-swappable batteries minimizing downtime. Monitor via the embedded card for early warnings—recharge fully after 24 hours post-test for accuracy. Keep it in a dust-free, ventilated space to avoid the common pitfall of fan dust buildup.
Pros, Cons, and Who It’s For
Pros:
- Zero-transfer-time double conversion for mission-critical loads.
- Highly scalable runtime with affordable battery packs.
- Comprehensive remote management out of the box.
- Energy-efficient design with low operating costs.
Cons:
- Higher upfront cost compared to line-interactive units.
- Requires rack kit for mounting (not included).
- Weighty at 54 kg—team lift recommended.
This UPS excels for mid-sized data centers, VoIP systems, or industrial controls in unstable grids. If you’re protecting high-availability setups (e.g., 4–6 servers at 70% load for 7+ minutes), it’s unmatched. For lighter needs, consider line-interactive alternatives; for hyperscale, look to modular systems.
Wrapping Up: Uptime Redefined
The APC Smart-UPS SRT5KXLI isn’t just a UPS—it’s a strategic asset for uninterrupted operations in 2025’s power-challenged world. With its blend of raw power, smart scalability, and eco-conscious engineering, it empowers IT teams to focus on innovation, not outages. Stock is readily available from US @ TIACO TECHNOLOGIES—pair it with extended batteries for tailored resilience.
Deployed the SRT5KXLI in your setup? Drop your runtime tales or tips below!