PremiumTower™ is a Swiss made 3-phase, online double-conversion Uninterruptible Power Supply. From 10 to 60kW, PremiumTower provides the best solution for small and medium data centres, comms rooms, IT networks and any mission critical application demanding high availability and unbeatable energy efficiency. PremiumTower offers built-in internal batteries from 10 to 60kW minimising the footprint utilisation, eliminating extra costs for external battery frames and avoiding complex installation. The flexibility in the number of battery blocks (30 to 50) allows the system designer to optimise costs vs autonomy time. At the same time, the high efficiency of 96.6% in double conversion (VFI) and 99.4% in Ultra-safe ECO mode guarantees maximum energy savings and the lowest Total Cost of Ownership.



  • Proven Reliability (30 years of experience)
  • Advanced Performance (Cost Savings)
  • Unbeatable Efficiency 96.6% (Lowest Operating Cost)
  • Unity Power Factor (kVA = kW)
  • Outstanding Overload Capability
  • Ease of Service (Swappable Plug & Play Internal Components)
  • Flexibility (Wide Range of Options)

Advanced performance

Unity Power Factor (kVA = kW)
PremiumTower provides a unity power factor that avoids the need for system oversize to support today's power factor corrected loads.

Outstanding Overload Capability
With a 124% continuous operation in overload condition, mission critical applications can be safe in the event of unexpected load demands.

High Efficiency 96.6% (VFI)
With a best in class efficiency of 96.6% in double conversion mode (VFI), PremiumTower provides the lowest Total Cost of Ownership.

Ultra-Safe Eco mode
With a 99.4% efficiency in Eco mode operation and an ultrafast reaction time of <1.9 ms, Ultra-Safe ECO mode enables an excellent trade-off between power quality and energy efficiency.

High Battery Charging current
With the ability to provide up to 5 times more charging current than typical standalone UPS, PremiumTower reduces the total system cost by eliminating the need for external battery chargers.

Exceptional Short Circuit Capability
With a Short Circuit capability of 3 times nominal current (3 x In), PremiumTower is able to clear output circuit protection in milliseconds.

Flexibility and Cost of Ownership

  • Unity Power Factor (kVA = kW)
  • Outstanding Overload Capability (continue 124% load)
  • High Efficiency 96,6%
  • Ultra-Safe Eco mode (up to 99,4% efficiency)
  • High Battery Charging current (up to 40A)
  • Exceptional Short Circuit Capability (3x nominal)
  • Internal Batteries from 10kW to 60kW  
  • Ease of Service (front access)
  • Ease of Service (With only 0.29 m2 for 10 /20 kW and 0.44 m2 for 30/40/60 kW)

Maximum Reliability and Availability

Swiss Quality 
Developed and manufactured in Switzerland, PremiumTower provides the highest standard of quality in components and manufacturing processes approved by the Swiss made label.

High Reliability by Design 
Three independent power converters increase system reliability and provide power continuity even in cases of power component failure.

Class Leading Availability 
The combination of Swiss Quality and the lowest MTTR gives PremiumTower class leading availability.

Distributed Active-Redundant Parallel Architecture (DARA)
PremiumTower implements Centiel’s DARA parallel architecture with an unlimited number of parallel units to add redundancy and scalability to the system.

Dual Input feed
PremiumTower can be supplied with two independent AC sources to further increase the power availability of the installation.



Uninterruptible Power Supply with the the highest availability
CumulusPower is comprised of modules with power of 10, 20, 25, 50 and 60 kW, which can be accommodated in single racks with total power ranging from 20kW to 600kW. In addition, the power Racks can be extended to 3,6 mW by horizontally paralleling up to 60 modules. The CumulusPower range is designed to protect small and mid-sized Datacenters as well as other mission critical applications with a maximum power of up to 3,6 mW.


The advanced Cumuluspower technology combines a unique Intelligent Module Technology (IMT)with a fault-tolerant parallel architecture, called Distributed Active-Redundant Architecture (DARA), thereby fulfilling the highest availability and reliability requirements. The Intelligent Modules containing the core technology of the Cumuluspower product family come in three sizes(10, 20 and 50kW). Same power size modules can be piled together to create systems with a power ranging from 10kVA/kW to 1.5mVA/mW.

Advanced performance 

  • High availability
  • Full redundancy
  • High efficiency 97%
  • Bypass redundancy
  • No single point of failure
  • Small footprint
  • Get what you pay for (kVA = kW)
  • Ad-hoc solutions
  • Minimized Total Cost of Ownership
  • Swiss Quality


Intelligent Module
Each module is a complete UPS. Thanks to Centiel’s long experience in module-design, the CumulusPower Intelligent Modules are equipped with three independent power converters, one static bypass, all hardware and all software (intelligence and monitoring) functions, making them fully independent and capable of safely isolating from the multi-module system whenever an internal fault occurs.

Hot swappable
CumulusPower modules can be swapped without the need to switch over the load to bypass. Besides that, a per-module parallel isolator fiscally isolates the module from the system reducing the risk of human error and increasing system availability.

DARA: Distributed Active Redundant Architecture
The architecture of the CumulusPower was designed to respond to the highest availability requirements, through the implementation of the system’s distributed decision-making in an event of a critical failure, and a correct management of the load sharing. The communication between the Intelligent Modules is accomplished by means of a fully redundant TripleMode communication BUS.

  • 9 nines availability (Zero Downtime)
  • Distributed Architecture (No Single Point of Failure)
  • Unity Power Factor (kVA = kW)
  • Ease of Service (Direct Component Access)
  • Small Footprint (+ 0.51 mW/m2)
  • Swiss Quality

More information about Centiel.

Please contact one of our specialists to discuss a possible solution and / or to request more information. Please e-mail or call us. You can also fill the contact form on the left, we will get in touch with you.

+ 31 180-415711


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