Riello Sentinel 5-10kVA Tower UPS

The Sentinel Tower UPS is a high-performance power protection system designed for critical IT environments, telecom networks, and security infrastructure. Built to deliver stable, efficient, and scalable backup power, it ensures continuous operation for demanding non-linear loads while maintaining compact dimensions and low energy waste.

Key Features of Sentinel Tower Up to 95% efficiency in ONLINE mode for reduced energy consumption
Unity power factor (kVA equals kW) for full usable power output
Parallel operation support for up to 3 UPS units
Load-controlled fan system for reduced noise levels
Designed for non-linear loads such as blade servers and IT systems
Selectable operating modes: ONLINE, ECO, SMART ACTIVE
Advanced LCD display for real-time UPS status and monitoring
Compact tower design with integrated mobility castors
High-Efficiency Power for Critical Infrastructure The Sentinel Tower is engineered to maximise efficiency while maintaining consistent power delivery. With up to 95% efficiency in ONLINE mode, it reduces unnecessary energy loss, making it suitable for always-on environments where uptime and operational cost control are essential.

Scalable Power Architecture This UPS system supports parallel configuration of up to three units, allowing organisations to increase capacity or build redundancy into their power infrastructure. This makes it suitable for growing IT environments that require flexible expansion without replacing existing hardware.

Optimised for Demanding IT Loads Designed specifically for non-linear loads, the Sentinel Tower performs reliably in environments such as server rooms, telecom installations, and security systems. Its three-level inverter ensures stable output even under complex electrical demands.

Quiet and Adaptive Cooling System The system incorporates load-controlled fan technology that automatically adjusts speed based on demand. This reduces unnecessary noise during low loads while maintaining effective cooling when performance requirements increase, keeping operational sound levels low.

Flexible Operating Modes Users can switch between ONLINE, ECO, and SMART ACTIVE modes directly from the control panel. This flexibility allows optimisation between energy efficiency, protection level, and operational requirements depending on the environment.

Compact Tower Design with High Output Capability Despite its high power capacity, the Sentinel Tower maintains a compact footprint suitable for constrained technical spaces. Built-in castors improve mobility, making installation and repositioning easier within server rooms or office environments.

Reliable Battery Performance and Protection The system incorporates advanced battery management features including automatic and manual testing. It also avoids unnecessary battery discharge during minor mains fluctuations, helping to extend overall battery lifespan and improve long-term reliability.

Delivering more real power in a compact footprint, the Sentinel Tower (STW) series is a proven performer across a variety of applications, including blade servers, safety systems, and telecommunications networks.

Choice of 5-6-8-10 kVA power ratings, with the latter 2 suitable for use on three-phase distribution networks. Designed to deal with non-linear loads, delivers quality power (pf 1) at high efficiency (up to 95%).





Proven Performance 3-level inverter helps deliver unity output power factor (kVA = kW) and achieve up to 95% efficiency in ONLINE mode, reducing unnecessary energy waste.

Designed to handle non-linear loads like blade servers and has high short circuit and overload capacity.





Scalable Power You can parallel up to 3 STWs together to increase capacity or ensure (2+1) redundancy. Parallel installations operate on a closed loop, meaning that they carry on running even if there’s an issue with the connection cables.





Complete Control Revamped custom-designed LCD display panel shows crucial operating data, alarms, and statuses such as voltage, remaining battery, and current load. Easily adjust operating modes at the simple push of a button.





Compact Footprint Whatever the power rating, the STW measures in at a compact 25 cm by 69.8 cm by 50 cm (W x D x H), with built-in castors assisting with mobility.

Minimal noise disruption as the fan speed automatically adjusts according to the current load.





High Battery Reliability STW features automatic and manual battery testing, while the batteries don’t cut in during temporary mains failures (< 20 msec) or if the input is between 184-276V, which helps to maintain lifespan.

For applications needing several hours’ autonomy, choose extended runtime versions (6 kVA and 10 kVA models) fitted with 6A chargers and connected to external battery boxes.



Note: ER series models have no internal batteries. These versions are fitted with upgraded battery chargers, for long runtime and business continuity applications. The batteries are housed in separate cabinets.

The Sentinel Tower 6000VA UPS is a high-performance online double-conversion power protection solution designed for critical IT infrastructure, telecom networks, and security systems. Combining unity power factor output, high operating efficiency, and scalable architecture, it delivers reliable power protection for demanding environments while maintaining a compact footprint.

Key Features of Sentinel Tower 6000VA 6000VA online double-conversion UPS for critical applications
Unity power factor delivers full 6000W output capacity
Up to 95% efficiency in ONLINE mode reduces energy consumption
Parallel operation support for up to 3 UPS units
Designed to support non-linear loads and blade servers
Load-controlled cooling system for quieter operation
LCD display panel provides real-time system monitoring
Selectable ONLINE, ECO, and SMART ACTIVE operating modes
Advanced Protection for Critical Infrastructure The Sentinel Tower 6000VA is engineered to provide continuous, high-quality power for business-critical equipment. Its online double-conversion technology delivers clean and stable output, helping protect sensitive systems from outages, voltage disturbances, and power quality issues.

Full Power Output with Unity Power Factor With unity power factor performance, the UPS delivers its full rated capacity as usable power. This allows organisations to maximise available power resources while supporting modern IT and networking equipment efficiently.

Designed for Non-Linear Loads The Sentinel Tower is optimised for environments containing non-linear loads such as blade servers, storage systems, telecom equipment, and security infrastructure. Its advanced inverter technology ensures dependable performance under demanding operating conditions.

Scalable Capacity and Redundancy Support for parallel operation of up to three UPS units allows businesses to increase capacity, extend resilience, or implement redundant power protection. This flexibility makes the system suitable for evolving infrastructure requirements.

Energy Efficient Operation Operating at up to 95% efficiency in ONLINE mode, the UPS helps reduce energy waste without compromising protection levels. This contributes to lower operating costs while maintaining continuous power conditioning.

Compact Design with Quiet Cooling Despite its substantial power capacity, the Sentinel Tower maintains a compact footprint suitable for server rooms and technical environments. Automatic fan speed control adjusts cooling performance according to load demand, helping minimise noise levels during operation.

Comprehensive Monitoring and Control The upgraded LCD display provides clear visibility of UPS status, battery condition, and load levels. Users can easily switch between ONLINE, ECO, and SMART ACTIVE operating modes to optimise protection and efficiency according to their requirements.

Enhanced Battery Reliability Automatic and manual battery testing functions help maintain dependable backup performance. Intelligent battery management minimises unnecessary discharge during brief mains disturbances, supporting longer battery lifespan and improved reliability.

The Riello Sentinel Tower (STW) is a high-efficiency online UPS system designed to deliver reliable power protection for IT infrastructure, telecom networks, and security systems with non-linear loads. Operating in the 5–10kVA range, it features a compact tower design, unity power factor, and up to 95% efficiency in online mode. Built for performance and flexibility, it supports parallel expansion, multiple operating modes, and advanced battery management, making it ideal for critical environments requiring stable and continuous power delivery.

Key Features of Sentinel Tower UPS Power range: 5–10kVA
Online mode efficiency up to 95%
Unity power factor (kVA = kW)
Supports parallel configuration up to 3 UPS units
Extended runtime models available (6kVA and 10kVA)
Load-controlled fan speed for reduced noise (

The Sentinel Tower 8000VA UPS is a high-efficiency online double-conversion power protection system designed for critical IT, telecom, and industrial environments. Delivering stable, clean energy with unity power factor performance, it ensures continuous operation for demanding non-linear loads such as servers, network infrastructure, and security systems.

Key Features of Sentinel Tower 8000VA online double-conversion UPS for critical infrastructure
Up to 95% efficiency in ONLINE mode reduces energy waste
Unity power factor (kVA = kW) for full usable output
Parallel capability for up to 3 UPS units for scalability or redundancy
Supports non-linear loads including blade servers and IT systems
Load-controlled fan system keeps noise below 45 dBA
Revamped LCD display for real-time system monitoring
Selectable operating modes: ONLINE, ECO, SMART ACTIVE
High-Efficiency Power for Critical Infrastructure The Sentinel Tower 8000VA is engineered to deliver stable and efficient power for always-on environments. With up to 95% efficiency in ONLINE mode, it reduces energy loss while maintaining continuous double-conversion protection for sensitive systems.

Scalable Architecture for Growing Systems This UPS supports parallel operation of up to three units, enabling increased capacity or redundancy. This makes it ideal for expanding IT infrastructures where reliability and scalability are essential.

Optimised for Demanding IT Loads Designed to handle non-linear loads, the system is well-suited for blade servers, telecom networks, and security installations. Its robust electrical design ensures stable performance even under complex load conditions.

Intelligent Cooling and Low Noise Operation The load-controlled fan system adjusts automatically based on demand, maintaining noise levels below 45 dBA. This ensures quiet operation without compromising thermal performance.

Flexible Operating Modes Users can switch between ONLINE, ECO, and SMART ACTIVE modes at the push of a button, allowing optimisation between energy efficiency, protection level, and operational requirements.

Compact Design with High Performance Output Despite its high power capacity, the Sentinel Tower maintains a compact footprint with integrated mobility features. This makes it suitable for constrained technical spaces while still delivering enterprise-grade performance.

Reliable Battery Management and Protection The system includes advanced battery management with automatic and manual testing. It also avoids unnecessary battery discharge during minor voltage fluctuations, helping extend overall battery lifespan and reliability.

Overview Delivering more real power in a compact footprint, the Sentinel Tower (STW) series is a proven performer across a variety of applications, including blade servers, safety systems, and telecommunications networks.

Choice of 5-6-8-10 kVA power ratings, with the latter 2 suitable for use on three-phase distribution networks. Designed to deal with non-linear loads, delivers quality power (pf 1) at high efficiency (up to 95%).





Proven Performance 3-level inverter helps deliver unity output power factor (kVA = kW) and achieve up to 95% efficiency in ONLINE mode, reducing unnecessary energy waste.

Designed to handle non-linear loads like blade servers and has high short circuit and overload capacity.





Scalable Power You can parallel up to 3 STWs together to increase capacity or ensure (2+1) redundancy. Parallel installations operate on a closed loop, meaning that they carry on running even if there’s an issue with the connection cables.





Complete Control Revamped custom-designed LCD display panel shows crucial operating data, alarms, and statuses such as voltage, remaining battery, and current load. Easily adjust operating modes at the simple push of a button.





Compact Footprint Whatever the power rating, the STW measures in at a compact 25 cm by 69.8 cm by 50 cm (W x D x H), with built-in castors assisting with mobility.

Minimal noise disruption as the fan speed automatically adjusts according to the current load.





High Battery Reliability STW features automatic and manual battery testing, while the batteries don’t cut in during temporary mains failures (< 20 msec) or if the input is between 184-276V, which helps to maintain lifespan.

For applications needing several hours’ autonomy, choose extended runtime versions (6 kVA and 10 kVA models) fitted with 6A chargers and connected to external battery boxes.