Li90 3-Phase Lithium UPS – Integrated UPS for Electrical Room Modernization (10–30kVA)

The Xtreme Power Li90 is an integrated lithium three-phase UPS platform designed for facility-level infrastructure modernization. It replaces legacy UPS architectures that rely on external battery cabinets with a compact, single-cabinet system optimized for lifecycle performance, reduced maintenance, and simplified deployment.

Li90 is typically deployed where electrical rooms must be modernized without expanding footprint, and where long-term maintenance exposure from VRLA batteries is no longer acceptable.

Key Specifications

• Capacity: 10 / 20 / 30 kVA
• Voltage: 208/120 V three-phase
• Topology: Online double-conversion
• Battery: Integrated lithium iron phosphate (LiFePO₄)
• Output Power Factor: 1.0
• Efficiency: Up to 94.5% online / 99% ECO mode
• Bypass: Integrated maintenance bypass
• Operating Temperature: Up to 50 °C (derated above 40 °C)
• Interface: 4.3” color touchscreen

Datasheet: https://xpcc.com/li90-flyer/
Lithium UPS Guide: https://xpcc.com/lithium-ups-guide/

Integrated Lithium UPS Architecture

Li90 defines a modern approach to three-phase UPS design by integrating lithium batteries directly within the UPS cabinet. Traditional UPS systems rely on external VRLA battery cabinets, increasing footprint, installation complexity, and ongoing maintenance requirements. Li90 eliminates this dependency by consolidating the UPS and energy storage into a single system.

This architecture reduces installation complexity, improves service accessibility, and enables higher system density within electrical rooms. More importantly, it aligns the UPS system with long-term infrastructure planning by removing periodic battery replacement as a recurring operational event.

Where Li90 Fits

Li90 operates as the facility-level UPS within a coordinated power architecture that spans from edge protection to centralized infrastructure.

• J60 / J60C → device-level and shallow rack protection
• J90 → high-density rack-level lithium UPS
• Li90 → centralized facility UPS (this platform)
• M90U → modular UPS for scalable capacity and redundancy

Li90 is selected when a centralized UPS architecture is preferred, but legacy battery cabinet requirements are no longer acceptable.

When to Choose Li90

Li90 is best suited for facilities pursuing modernization of existing UPS infrastructure without transitioning to a fully modular or distributed architecture.

It is commonly selected when:

• Replacing aging VRLA-based UPS systems with high maintenance exposure
• Eliminating external battery cabinets to reclaim electrical room space
• Simplifying installation in retrofit environments
• Reducing lifecycle cost through long-life lithium batteries
• Maintaining a centralized UPS topology while improving system density

For environments requiring scalable redundancy or capacity expansion, modular platforms such as https://xpcc.com/products/m90u/ may be more appropriate. For rack-level distributed architectures, lithium platforms such as https://xpcc.com/products/j90/ are typically deployed.

Lifecycle and Maintenance Advantage

Li90 significantly reduces long-term operational burden by eliminating the periodic battery replacement cycles associated with VRLA systems. Lithium iron phosphate batteries provide a much longer service life, with performance that can reach up to 15 years under ideal operating conditions. This improves predictability, reduces service interventions, and aligns UPS infrastructure with long-term facility planning cycles.

By removing external battery systems and extending battery life, Li90 minimizes both planned and unplanned maintenance events, making it well suited for facilities where uptime and service simplicity are critical.

Li90 vs Traditional VRLA UPS Systems

The primary architectural difference between Li90 and conventional UPS systems is the elimination of external battery cabinets.

Traditional VRLA-based systems require separate battery enclosures, frequent replacement cycles (typically every 3–5 years), and increased maintenance complexity. These systems also consume additional floor space and introduce more points of failure. Li90 consolidates energy storage within the UPS cabinet, reducing footprint, simplifying installation, and removing the need for ongoing battery replacement programs. This results in a cleaner electrical room design and a more predictable long-term operating model.

Li90 vs Other Three-Phase UPS Platforms

Li90 is often evaluated against platforms such as Eaton 93PM, APC Galaxy VS, and Vertiv Liebert EXS when modernizing facility UPS infrastructure. The key distinction is architectural: most competing platforms rely on external or modular battery systems, increasing system footprint and lifecycle maintenance requirements.

Li90 integrates lithium batteries within a single cabinet, enabling a more compact deployment with reduced maintenance exposure. While traditional platforms may support extended runtime through additional cabinets, Li90 prioritizes internal runtime and lifecycle simplicity as part of a modernization strategy.

Detailed comparisons: https://xpcc.com/li90-ups-comparisons/

Replace Eaton, APC, and Vertiv UPS Systems

Li90 is commonly deployed in replacement scenarios where legacy UPS systems are approaching battery replacement or experiencing rising maintenance costs.

Typical modernization projects include:

• Eaton 9355 systems nearing end-of-life battery cycles
• Eaton 93PM installations with increasing service complexity
• APC Galaxy VS systems using external battery cabinets
• Vertiv Liebert EXS platforms in space-constrained environments

By eliminating external batteries and reducing lifecycle maintenance requirements, Li90 enables infrastructure upgrades without requiring major changes to upstream electrical systems.

Explore comparisons: https://xpcc.com/li90-ups-comparisons/

Typical Applications

Li90 is deployed in facilities undergoing electrical infrastructure modernization where space, maintenance, and lifecycle cost are primary considerations.

Common applications include:

• Electrical room upgrades
• Battery replacement avoidance programs
• Healthcare and telecom infrastructure
• Industrial and manufacturing facilities
• Edge and distributed data center environments

Related applications:
https://xpcc.com/data-center-ups/
https://xpcc.com/ups-for-industrial-automation/
https://xpcc.com/ups-for-edge-data-centers/
https://xpcc.com/industrial-lithium-ups/

Capacity Guidance

Capacity selection should be aligned with facility load, redundancy requirements, and runtime objectives.

• 10 kVA systems are typically deployed for smaller distributed loads and industrial control environments
• 20 kVA systems support mixed-use infrastructure such as healthcare and telecommunications
• 30 kVA systems are used for centralized facility loads where higher capacity consolidation is required

Runtime should be evaluated based on outage duration, generator coordination, and overall continuity strategy.

UPS sizing tool: https://xpcc.com/selector

Xtreme Power Three-Phase UPS Portfolio

Li90 serves as the modernization platform within the Xtreme Power three-phase portfolio.

• Li90 → integrated lithium UPS for modernization
• E91 → traditional VRLA-based UPS systems
• M90U → modular UPS for scalable infrastructure

Related platforms:
https://xpcc.com/products/e91/
https://xpcc.com/products/m90u/

Technical Summary

• Topology: Online double conversion
• Capacity: 10–30 kVA
• Voltage: 208/120 V three-phase
• Battery: Integrated LiFePO₄
• Efficiency: Up to 94.5% online / 99% ECO
• Operating Temperature: Up to 50 °C (derated above 40 °C)
• Bypass: Integrated maintenance bypass
• Certifications: UL 1778, UL 1973, UN 38.3
• Warranty: Startup + 2-year labor; 5-year battery

Plan With Confidence

Xtreme Power Conversion supports facility engineers, electrical consultants, and infrastructure planners in modernizing UPS systems with improved density, reduced maintenance, and predictable lifecycle performance.

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