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Riello UPS

Italy's leading UPS manufacturer. Transformerless online double-conversion power protection from 400 VA to 6 MVA — engineered for efficiency, reliability and scalability across data centres, industry and critical infrastructure.

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10–120 kVA Sentryum
96.6% efficiency
Parallel up to 8 units
Unity power factor
— About Riello UPS

A manufacturer we trust

Riello UPS is one of Europe's leading uninterruptible power supply manufacturers, with over 75 years of power electronics heritage. Headquartered in Italy, Riello designs and builds transformerless online double-conversion UPS from 400 VA to 6 MVA, combining industry-leading efficiency with compact footprints and scalable parallel architectures. The Sentryum, Sentinel and Multi Power ranges protect data centres, healthcare, industrial and life-safety installations across the UK and worldwide.

— Range families

Browse by family

Each family is engineered for a different load and environment. Pick the one that matches your application.

10–160 kVA

Sentryum

Third-generation transformerless online UPS. Three cabinet sizes plus a hot-swap modular rack. 96.6% efficiency, parallel up to 8 units.

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700 VA – 10 kVA

Sentinel

Compact tower and rack/tower single-phase UPS for IT, telecoms and electro-medical loads. ONLINE double conversion, unity power factor.

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45–600 kVA

Multi Power

Award-winning modular three-phase UPS with hot-swap power modules and pay-as-you-grow scalability up to 1008 kW.

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3–600 kVA

Central Power Supplies

EN 50171 compliant CPS for emergency lighting, fire alarms, lifts and life-safety systems.

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Network & I/O

Accessories

NetMan network cards and MultiCOM I/O expanders for monitoring and control.

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— Why Riello

Engineered to protect

Transformerless efficiency
Up to 98.1% online efficiency cuts energy waste and cooling load.
Scalable parallel
Parallel up to 8 units for capacity or N+1 redundancy without architecture redesign.
Unity power factor
kVA = kW, delivering more real power in a smaller footprint.
Battery flexibility
VRLA, lithium-ion and supercapacitor compatibility across the range.
— Riello Range

Explore the range

Multi Power2 (MP2 & M2X)
120-600 kVA
Modular UPS

Multi Power2 (MP2 & M2X)

Next-gen modular UPS. Up to 98.1% efficiency. Silicon carbide technology. Up to 600 kW per cabinet.

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CSS Master
100-600 kVA
Central Power Supply (CPS)

CSS Master

Three-phase Central Power Supply (CPS) 100-600 kVA, EN 50171 compliant. For large emergency lighting, fire safety and life safety systems.

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Multi Power (MPW & MPX)
45-294 kVA
Modular UPS

Multi Power (MPW & MPX)

Award-winning modular UPS. 96.6% efficiency. Pay-as-you-grow scalability up to 1008 kW with 4 cabinets.

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Sentryum Rack SRT / SRM
20-160 kVA
Rack / Modular UPS

Sentryum Rack SRT / SRM

Hot-swappable 20 kVA modules in a 19" rack. Scale to 160 kVA. 96.3% efficiency. Single and three-phase output.

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Sentryum S3T / S3M
10-120 kVA
Tower UPS

Sentryum S3T / S3M

Third-generation transformerless online UPS. Three cabinet sizes. 96.6% efficiency. Parallel up to 8 units.

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CSS Sentryum
6-120 kVA
Central Power Supply (CPS)

CSS Sentryum

Central Power Supply (CPS) 6-120 kVA, EN 50171 compliant. Three-phase or single/three-phase input, single-phase output. For emergency and safety systems.

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Sentinel Tower (STW)
5-10 kVA
Compact Tower UPS

Sentinel Tower (STW)

Space-saving 5-10 kVA tower for IT, telecoms and safety systems. 95% efficiency. Parallel up to 3 units.

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Sentinel Dual (SDU)
4-10 kVA
Rack / Tower UPS

Sentinel Dual (SDU)

Doubly-versatile 4-10 kVA UPS. 3U/6U rack or tower. 95% efficiency. Parallel up to 3 units.

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CSS Sentinel Tower
3-5 kVA
Central Power Supply (CPS)

CSS Sentinel Tower

Single-phase Central Power Supply (CPS) 3-5 kVA, EN 50171 compliant. For emergency lighting, fire alarms, smoke detectors and sprinklers.

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Sentinel Dual2 (SD2)
1000-3000 VA
Rack / Tower UPS

Sentinel Dual2 (SD2)

Versatile 2U rack or tower UPS. ONLINE double conversion. Bluetooth setup. 5-year warranty.

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Sentinel Pro2 (SP2)
700-3000 VA
Tower UPS

Sentinel Pro2 (SP2)

Compact, efficient single-phase UPS. ONLINE double conversion. Power factor 1. 5-year warranty.

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— Sectors served

Protecting critical environments

Riello UPS protect the loads that can't go down — from data centres to hospitals and industrial plant.

— End-to-end support

Specify · Supply · Install · Maintain

We support your Riello UPS for its entire lifecycle — from first specification to decades of maintenance.

— Questions

Frequently asked

Riello UPS span 400 VA to 6 MVA across the Sentryum, Sentinel, Multi Power and Master ranges, covering everything from a single workstation to hyperscale data centres.

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