S71 Line-Interactive UPS (700–1500 VA, 120V)

Tower UPS with AVR for Distributed Power Stability

The Xtreme Power S71 Series is a line-interactive UPS platform designed for distributed infrastructure where voltage instability and short-duration outages impact system reliability. It provides battery backup during outages and automatic voltage regulation (AVR) to stabilize incoming power without transferring to battery. This reduces battery wear while maintaining consistent output to connected equipment.

S71 is deployed where standby UPS systems are insufficient and lithium platforms such as J60 are not required, providing an effective balance between performance, simplicity, and cost.

Key Specifications

• Capacity: 700 / 1000 / 1500 VA
• Voltage: 120V single-phase
• Topology: Line-interactive
• Voltage Regulation: Automatic Voltage Regulation (AVR)
• Form Factor: Tower
• Output: Simulated sine wave
• Battery: VRLA
• Compliance: TAA compliant

Datasheet:
Download S71 Flyer

Positioning: Voltage Stability Without Online Complexity

S71 is engineered for environments where power quality—not just outages—is the primary concern.

In many distributed deployments, voltage fluctuations occur more frequently than full outages. S71 corrects these conditions through AVR without switching to battery, preserving battery life and maintaining stable output to connected loads. This positions S71 between standby UPS systems and lithium or online double-conversion platforms, delivering improved power stability while maintaining simplicity and cost efficiency.

Where S71 Fits in Power Architecture

S71 serves as the enhanced entry tier within the Xtreme Power distributed UPS architecture, bridging the gap between basic backup and higher-performance platforms.

Within the architecture:

• A60 → standby UPS for basic outage protection
• S71 → line-interactive UPS with AVR (this platform)
• J60 → compact lithium UPS for lifecycle and space-constrained applications
• P80 → rack-mounted UPS for structured IT environments
• P91 → online double-conversion UPS for critical loads
• J90 → high-density lithium UPS for space-constrained infrastructure

For broader system design context:
Rack Power Architecture Guide

Distributed UPS Architecture Comparison

S71 improves voltage stability compared to standby UPS systems, while P80 introduces rack-based deployment, pure sine wave output, and scalable runtime for structured IT environments.

S71 vs Standby and Online UPS

S71 is selected when applications require greater power stability than standby UPS systems but do not justify the complexity of lithium or full online UPS architecture.

Compared to standby UPS platforms, S71 adds voltage regulation and reduces unnecessary battery transfers, improving performance in unstable power environments. Compared to online UPS systems, it provides a simpler, more efficient, and cost-effective solution where continuous power conditioning is not required.

Replace APC, Eaton, and Vertiv Line-Interactive UPS

S71 is commonly deployed as a standardized replacement for line-interactive UPS platforms such as APC Smart-UPS (SMT series), Eaton 5P, and Vertiv Liebert PSI.

It supports consistent deployment across distributed environments while adding TAA compliance and stable voltage regulation for improved operational reliability.

Explore detailed comparisons:
S71 UPS Comparisons Hub

Deployment: Designed for Distributed Environments

S71 is built for simple, repeatable deployment across decentralized infrastructure. The tower form factor allows flexible installation alongside equipment—under desks, at POS stations, within AV setups, or in small network environments—without requiring rack infrastructure.

This makes S71 well suited for both new deployments and retrofit applications where speed and simplicity are critical.

Typical Applications

S71 is deployed across distributed environments where both power continuity and voltage stability are required. Common use cases include retail and POS systems, government and TAA-compliant installations, desktop workstations, AV and digital signage, security systems, and small network infrastructure.

Capacity Guidance

Capacity should be selected based on connected load and application requirements.

700 VA systems are typically used for small network devices and desktop equipment.
1000 VA systems support POS systems, AV equipment, and distributed IT loads.
1500 VA systems are used for higher-load or multi-device environments.

S71 is optimized for short-duration ride-through and voltage stabilization, not extended runtime applications.

UPS sizing tool:
UPS Selector Tool

When to Consider Lithium UPS Platforms

For applications requiring longer lifecycle, reduced maintenance, or improved performance in high-temperature or space-constrained environments, lithium-based UPS platforms may be considered. At the distributed and device level, the most direct alternative is the J60 Series, which provides longer battery lifespan, faster recharge, compact form factors, and operation in higher ambient temperatures. J60 is typically selected for embedded applications, kiosks, digital signage, and edge devices where footprint, serviceability, and lifecycle cost are critical.

For rack-based or higher-power applications, lithium platforms such as P91 Li and J90 extend these benefits into structured IT environments.

Explore lithium UPS architecture:
Lithium UPS Guide

Technical Summary

• Topology: Line-interactive
• Capacity Range: 700–1500 VA
• Voltage: 120V
• Battery System: VRLA
• Form Factor: Tower
• Primary Function: Voltage regulation and battery backup

Plan With Confidence

The S71 Series provides a practical, architecture-aligned solution for distributed environments where power quality issues are common but infrastructure simplicity and cost efficiency remain priorities. Xtreme Power supports contractors, integrators, and infrastructure planners with standardized UPS platforms designed for real-world deployment conditions.

Phone: (800) 582-4524
Email: sales@xpcc.com