CE+T Flexa 25 Modular UPS Systems for Compact Racks and Long-Backup Applications
Flexa 25 is a compact modular UPS platform for smaller critical AC loads that need resilient backup in standard 19-inch cabinets. With modular 3 kVA building blocks, 48 V battery architecture, and a 5U rack format, it fits telecom, datacom, utility, transport, and industrial cabinet-based installations where space is limited but backup time requirements can still be significant.
The platform is particularly relevant for distributed power design in smaller and mid-sized data centres and equipment rooms, where individual rack loads often remain within this power range and a compact rack-integrated UPS can be a more practical choice than a larger centralized system. It also works well in Astrec-integrated long-backup solutions using 48 V LFP batteries, especially where extended autonomy must be achieved inside standard IT cabinets. In some projects, this longer battery autonomy can also reduce or remove the need for generator support altogether.
Flexa 25 modular UPS – Key features and advantages
Designed for smaller critical loads that need compact rack integration, scalable backup time, and practical deployment in telecom, industrial, and distributed data-room environments.
Compact 19-inch rack format
A 5U modular UPS designed for standard IT and telecom cabinets where space is limited and power protection must stay close to the load.
48 V architecture for long autonomy
Its 48 V battery architecture makes Flexa 25 a strong fit for long-backup UPS solutions, including Astrec-integrated LFP systems.
Modular 3 to 12 kVA scaling
Capacity can be built step by step from 3 to 12 kVA, making it easier to size the UPS to real rack and room loads.
Well suited to distributed UPS design
A practical choice for protecting individual racks or technical rooms locally instead of relying only on larger centralized backup systems.
System format and deployment options
Compare the main Flexa 25 platform variants, system architectures, and expansion options within the family.
Flexa 25 modular UPS 3–12 kVA
Flexa 25 modular UPS is a compact single-phase modular UPS platform for critical AC loads from 3 to 12 kVA. In a standard 19-inch, 5U rack format, it combines the power modules, AC distribution, manual bypass, and Inview S monitoring into one integrated cabinet-ready system. This makes it well suited to sites where resilient backup must be added inside existing IT or telecom racks rather than with a larger standalone UPS installation.
The system is designed for smaller critical loads that still require a structured UPS architecture rather than a simple small-power backup unit. Capacity can be expanded step by step from 3 to 12 kVA, which helps match the UPS to real room, cabinet, or rack demand without unnecessary oversizing. The 48 V battery architecture also gives flexibility in backup-time design, making the platform suitable for telecom rooms, equipment rooms, industrial control cabinets, and distributed data-centre deployments where compact integration and practical long-autonomy design are both important.
Long-backup rack-integrated solutions
Flexa 25 modular UPS is well suited to compact rack-based UPS systems where extended backup time is required in a standard 19-inch cabinet. Its 48 V battery architecture allows practical long-autonomy designs while keeping the overall solution compact, serviceable, and easy to integrate close to the load.
This makes the platform attractive for telecom rooms, equipment rooms, and smaller or mid-sized data-centre environments where local cabinet-level backup can be more practical than a larger centralized UPS. In Astrec-integrated LFP solutions, the approach can also improve lifetime economics through lower maintenance, longer battery service life, reduced replacement frequency, and more efficient use of cabinet space. The result is a long-backup UPS architecture with strong practical value and low total cost of ownership over time.
Core modules, monitoring, and battery flexibility
Explore the building blocks behind Flexa 25, from hot-swappable power modules and integrated supervision to flexible 48 V battery integration for both conventional and long-backup UPS designs.
Inview S monitoring and supervision
Inview S provides local monitoring and system supervision for the Flexa 25 platform through the integrated front display and communication interfaces. It gives operators a practical control layer for alarms, status visibility, and integration into site monitoring environments.
For compact cabinet-based UPS systems, monitoring is not a secondary feature but part of the architecture. Inview S helps make Flexa 25 easier to deploy in technical rooms, telecom sites, and equipment cabinets where operators need clear status visibility, remote communication, and a straightforward way to supervise battery-backed power locally.
Flexa 25 230/48 power module
The Flexa 25 platform is built around hot-swappable 3 kVA power modules that allow capacity to be added step by step up to 12 kVA. This modular approach improves serviceability and makes it easier to size the UPS to real cabinet and room loads without oversizing from the start.
The module architecture is one of the reasons Flexa 25 fits smaller critical-power installations better than many traditional low-power UPS systems. Instead of treating the UPS as a fixed black box, the system can be expanded and serviced at module level while remaining in a compact 19-inch rack format suited to telecom, datacom, and industrial cabinets.
Flexible battery integration
Flexa 25 uses a 48 V battery architecture that allows backup time to be sized according to site requirements. In practical system design, this gives broad flexibility across battery technologies including lead-acid, NiCd, NiMH, LFP, sodium-based solutions, and other compatible 48 V battery approaches.
This flexibility is one of the main architectural strengths of Flexa 25. The platform can be adapted to different runtime targets, site conditions, maintenance strategies, and lifecycle priorities without changing the core UPS concept. That makes it easier to design anything from conventional backup systems to long-autonomy solutions with lower maintenance needs and lower total cost of ownership over time.
Talk to a power specialist about Flexa 25
Planning a compact rack UPS, long-backup cabinet solution, or distributed power architecture for a smaller critical load? We can help define the right Flexa 25 configuration, battery concept, and deployment approach for your site.