P91 Online UPS – Scalable Runtime Rack/Tower UPS (1000–3000VA, 120V)

The Xtreme Power P91 Series is designed for applications where uptime, voltage stability, and runtime flexibility must be maintained within a compact rack or tower form factor.

Key Specifications

• 1000 / 1500 / 2000 / 3000 VA
• 120V single phase
• Online double-conversion topology
• Unity output power factor (0.9–1.0)
• Internal batteries with external expansion capability
• 2U rack / tower convertible
• Optional SNMP / web-based monitoring
• TAA compliant

Datasheet:
https://xpcc.com/wp-content/uploads/P91-1-3kVA-Flyer.pdf

Scalable Runtime UPS Architecture

P91 defines the category of scalable runtime online UPS systems.

Unlike fixed-runtime UPS platforms, P91 is built around a flexible battery architecture. Internal batteries provide standard ride-through, while external battery packs enable runtime to be extended based on application requirements. Online double-conversion topology continuously conditions incoming power, isolating connected equipment from voltage disturbances, frequency variation, and electrical noise. During outages, the system maintains zero transfer time to protect critical loads. N This allows runtime to be engineered per deployment rather than constrained by internal battery capacity.

Where P91 Fits

P91 operates as the standard online UPS platform within distributed power architecture, providing conditioned power and scalable runtime at the rack or edge level.

Within the Xtreme Power architecture:

• A60 → standby UPS (device-level)
• S71 → line-interactive UPS
• P80 → line-interactive rack UPS
• P91 → online UPS with scalable runtime (this platform)
• P91 Li → lithium runtime platform
• J90 → high-density lithium UPS

P91 is typically deployed in network closets, IDF/MDF environments, and multi-site infrastructure where runtime requirements vary but platform standardization is required.

Key Advantages of P91

P91 is engineered for applications where runtime flexibility and cost-effective deployment are primary design considerations.

• Scalable runtime through external battery expansion
• Continuous power conditioning with zero transfer time
• Standardized platform for multi-site deployments
• Rack or tower deployment flexibility
• Lower upfront cost compared to lithium UPS platforms
• Optional network monitoring and integration

P91 vs Conventional Rack UPS Platforms

Compared to line-interactive and entry-level UPS systems, P91 provides continuous power conditioning and zero transfer time, making it suitable for sensitive IT, AV, and control systems. Its primary advantage is runtime flexibility. External battery expansion allows a single UPS platform to support a wide range of outage scenarios, from short ride-through to extended runtime, without requiring multiple system types.

P91 vs Lithium UPS Platforms

P91 represents a VRLA-based approach optimized for runtime scalability and lower initial cost. Lithium UPS platforms such as P91 Li and J90 prioritize lifecycle performance, reduced maintenance, and higher density. P91 is typically selected when extended runtime requirements and cost structure outweigh lifecycle optimization.

Learn more:
https://xpcc.com/lithium-ups-guide/

Replace APC and Eaton 120V Online UPS

P91 is commonly deployed as a replacement for legacy rackmount UPS platforms, including:

• APC Smart-UPS SRT Series
• APC Smart-UPS SMT Series
• Eaton 9PX UPS
• Eaton 5PX UPS
• Vertiv Liebert GXT5 UPS

It provides a more flexible runtime architecture while maintaining full-time power conditioning and consistent deployment across distributed environments.

Explore comparisons:
https://xpcc.com/p91-ups-competitive-comparisons/

Runtime Architecture and Deployment Flexibility

The combination of internal batteries and external expansion enables P91 to support multiple deployment strategies.It can be configured for short-duration ride-through, controlled shutdown, or extended runtime for critical infrastructure. This flexibility is particularly valuable in multi-site deployments where runtime requirements vary across locations.

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

Typical Applications

P91 is deployed across distributed infrastructure environments where continuous power conditioning and runtime flexibility are required. Common applications include network closets and IT infrastructure, AV systems, retail and restaurant environments, education facilities, and multi-site commercial installations.

Capacity Guidance

Capacity selection is based on load and runtime objectives:

• 1000 VA → small network and AV systems
• 1500 VA → distributed IT equipment
• 2000 VA → network racks and AV infrastructure
• 3000 VA → higher-density distributed systems

Runtime is defined by battery configuration and load profile.

Rack Power Architecture Integration

P91 is commonly deployed alongside intelligent power distribution platforms such as the Xtreme Power SPDU, enabling outlet-level monitoring, remote reboot, and standardized rack power architecture across distributed environments.

System design context:
https://xpcc.com/rack-power-architecture/

Smart PDU overview:
https://xpcc.com/smart-pdu/

Technical Summary

• Topology: Online double conversion
• Capacity: 1000–3000 VA
• Voltage: 120V
• Battery: VRLA (internal + external expansion)
• Form Factor: 2U rack / tower
• Runtime: Scalable
• Monitoring: Optional SNMP / web
• Compliance: TAA

Plan With Confidence

Xtreme Power Conversion supports engineers, contractors, and infrastructure planners in deploying UPS systems with scalable runtime, continuous power protection, and standardized architectures across distributed environments.

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