53981 Qoltec 2000VA Online (Double-Conversion) UPS/USV

High-Availability Online Double-Conversion UPS for Edge IT Continuity with the 53981

The 53981 is a single-phase online UPS engineered for continuous power conditioning in network closets and small server rooms where voltage instability and transfer delays are unacceptable. By using double-conversion topology, the 53981 continuously regenerates a pure sine wave output, decoupling connected systems from input disturbances and providing stable power for sensitive IT loads.

Designed for edge and branch infrastructure, the 53981 supports a 2000VA/1600W class load profile aligned with compact rack and room deployments that host virtualization nodes, storage appliances, security platforms, or VoIP systems. A hardwire input feed simplifies integration into managed electrical distribution, while EU socket outputs enable clean replacement of legacy rack/room UPS units without redesigning downstream cabling. This architecture prioritizes predictable runtime behavior under fluctuating mains conditions, reducing risk to PSU input stages and maintaining UPS-to-load compatibility for modern active PFC power supplies.

Why Choose the 53981?

The 53981 delivers deterministic power quality and uptime through always-on conversion, making it a pragmatic choice when branch IT must remain operational during brownouts, frequency variation, or abrupt outages. The 53981 balances density-to-performance for constrained footprints while providing an enterprise-relevant scalability profile for standard 1-phase deployments, enabling consistent rollout across distributed sites with uniform operational behavior.

Qoltec focuses on robust electrical engineering and practical integration for business-critical environments, aligning the 53981 with modern data centre and edge standards for power protection, predictable load handling, and long-term operational reliability.

Key Applications:

• Network closet and branch IT protection
• Small server room power conditioning
• Storage and NAS continuity
• VoIP and unified communications uptime
• Security and access control systems

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment targets for the 53981 and from an extended warranty of up to 6 years to reduce operational risk across distributed UPS installations.