UK’s trusted IT infrastructure partner since 2003
Servnet
FinanceToolsConfiguratorGet in Touch
← Comparison Tool

🔋 APC Smart-UPS Ultra vs Eaton 9PX vs Riello Sentryum

AI-powered analysis across 25 matched specifications

APC Smart-UPS Ultra 1U rack online lithium-ion UPS unit front view
APC Smart-UPS Ultra
APC
6.5
Overall Score
Best for: Space-constrained rack environments requiring long-life lithium-ion batteries and cloud monitoring
View Full Details
Eaton 9PX 2U rack online UPS unit front view
Eaton 9PX
Eaton
6.8
Overall Score
Best for: Mid-range server protection with hot-swappable batteries and certified virtualisation integration
View Full Details
Riello Sentryum 3-phase online UPS data centre cabinet 60kVA
Riello Sentryum
Riello
8.2
Overall Score
Best for: Large-scale data centre and critical infrastructure with parallel redundancy and unity power factor requirements
View Full Details
Know which one you want? Get UK pricing.
Fleet or single unit — we quote like-for-like, same working day. No obligation.
Get a quote →

Performance Overview

Scores based on quantifiable specification values (1-10 scale)

ComputeMemoryStorageNetworkingExpandabilityManagement
APC Smart-UPS Ultra
Eaton 9PX
Riello Sentryum
Compute
APC Smart-UPS Ultra
2.0
Eaton 9PX
2.0
Riello Sentryum
9.5
Memory
APC Smart-UPS Ultra
2.0
Eaton 9PX
2.0
Riello Sentryum
2.0
Storage
APC Smart-UPS Ultra
8.5
Eaton 9PX
7.5
Riello Sentryum
6.0
Networking
APC Smart-UPS Ultra
7.0
Eaton 9PX
8.0
Riello Sentryum
6.5
Expandability
APC Smart-UPS Ultra
8.0
Eaton 9PX
8.5
Riello Sentryum
9.5
Management
APC Smart-UPS Ultra
8.0
Eaton 9PX
8.5
Riello Sentryum
8.0

Detailed Specifications

Specification
APC Smart-UPS Ultra
APC
Eaton 9PX
Eaton
Riello Sentryum
Riello
Key Metrics
TopologyOnline double-conversion with automatic/manual bypassOnline double-conversion with bypassOnline double-conversion, transformerless
Power Range1500VA/1500W or 3000VA/3000W1500VA/1500W, 2200VA/2200W, 3000VA/3000W, 6000VA/6000W10, 15, 20, 30, 40, 60, 80, 100, 120 kVA
Output WaveformPure sine wave, < 2% THD at linear loadPure sine wave, <2% THD at linear load--
Transfer TimeZero (online); 4ms to bypass on inverter faultZero (online); <4ms to bypass--
EfficiencyUp to 97% online; up to 99% ECO mode--Up to 96.6% online mode
Power Factor----Unity (kVA = kW)
Output THD----< 1% (resistive); < 1.5% (non-linear load)
Overload Capability----125% for 10 min; 150% for 1 min; 270% for 200ms short circuit
Power
Input Voltage208–230V AC (IEC model); 50/60Hz +/-3Hz230V AC, 50Hz (IEC C14/C20 input)--
Output Voltage--230V AC +/-1% online; +/-2% on battery--
Input Config----3:3, 3:1, or 1:1 phase configurations
I/O & Ports
Outlets3 x IEC C13 + 2 x IEC C19 (3kVA model)8 x IEC C13 + 1 x IEC C19 (model dependent); 6kVA: C19 inputs--
Storage
Battery TypeLithium-ion (integrated)VRLA sealed lead-acid; hot-swap front accessibleVRLA sealed lead-acid
Battery Life8–10 yearsABM 3-stage — up to 50% longer battery life--
Recharge Time1.5 hours (80% capacity)----
Runtime ExtensionUp to 5 x SRTL50RMBP1U-Li external battery packsUp to 4 x EBM Extended Battery Modules--
Parallel Units----Up to 8 units for N+1 or N+N redundancy
Physical / Environmental
Form Factor1U rack (43mm H x 432mm W x 560mm D); tower convertible2U rack/tower (1.5–3kVA); 3U rack/tower (6kVA)Compact (CPT), Active (ACT), Xtend (XTD) cabinet options
Weight15.9kg (3kVA model)----
Management
Management InterfacesSmartConnect (built-in Ethernet); USB; optional NMC SmartSlotUSB HID, RS-232; optional NETWORK-M3 Gigabit NMCRS-232, USB, dry contacts; optional NetMan 208 SNMP card
Display----5-inch colour touchscreen + LED status indicator
Software & OS Compatibility
Software--Eaton Intelligent Power Manager (IPM)--
Certifications--VMware Ready; Citrix Ready; CE, CB, TUVIEC 62040-1, IEC 62040-2, VFI-SS-111
Warranty & Support
Warranty5 years including battery3 years electronics and battery--
Compute
Processor----Dual-core DSP; 3-level inverters at 18kHz
Key Metrics
Topology
APC Smart-UPS UltraOnline double-conversion with automatic/manual bypass
Eaton 9PXOnline double-conversion with bypass
Riello SentryumOnline double-conversion, transformerless
Power Range
APC Smart-UPS Ultra1500VA/1500W or 3000VA/3000W
Eaton 9PX1500VA/1500W, 2200VA/2200W, 3000VA/3000W, 6000VA/6000W
Riello Sentryum10, 15, 20, 30, 40, 60, 80, 100, 120 kVA
Output Waveform
APC Smart-UPS UltraPure sine wave, < 2% THD at linear load
Eaton 9PXPure sine wave, <2% THD at linear load
Riello Sentryum--
Transfer Time
APC Smart-UPS UltraZero (online); 4ms to bypass on inverter fault
Eaton 9PXZero (online); <4ms to bypass
Riello Sentryum--
Efficiency
APC Smart-UPS UltraUp to 97% online; up to 99% ECO mode
Eaton 9PX--
Riello SentryumUp to 96.6% online mode
Power Factor
APC Smart-UPS Ultra--
Eaton 9PX--
Riello SentryumUnity (kVA = kW)
Output THD
APC Smart-UPS Ultra--
Eaton 9PX--
Riello Sentryum< 1% (resistive); < 1.5% (non-linear load)
Overload Capability
APC Smart-UPS Ultra--
Eaton 9PX--
Riello Sentryum125% for 10 min; 150% for 1 min; 270% for 200ms short circuit
Power
Input Voltage
APC Smart-UPS Ultra208–230V AC (IEC model); 50/60Hz +/-3Hz
Eaton 9PX230V AC, 50Hz (IEC C14/C20 input)
Riello Sentryum--
Output Voltage
APC Smart-UPS Ultra--
Eaton 9PX230V AC +/-1% online; +/-2% on battery
Riello Sentryum--
Input Config
APC Smart-UPS Ultra--
Eaton 9PX--
Riello Sentryum3:3, 3:1, or 1:1 phase configurations
I/O & Ports
Outlets
APC Smart-UPS Ultra3 x IEC C13 + 2 x IEC C19 (3kVA model)
Eaton 9PX8 x IEC C13 + 1 x IEC C19 (model dependent); 6kVA: C19 inputs
Riello Sentryum--
Storage
Battery Type
APC Smart-UPS UltraLithium-ion (integrated)
Eaton 9PXVRLA sealed lead-acid; hot-swap front accessible
Riello SentryumVRLA sealed lead-acid
Battery Life
APC Smart-UPS Ultra8–10 years
Eaton 9PXABM 3-stage — up to 50% longer battery life
Riello Sentryum--
Recharge Time
APC Smart-UPS Ultra1.5 hours (80% capacity)
Eaton 9PX--
Riello Sentryum--
Runtime Extension
APC Smart-UPS UltraUp to 5 x SRTL50RMBP1U-Li external battery packs
Eaton 9PXUp to 4 x EBM Extended Battery Modules
Riello Sentryum--
Parallel Units
APC Smart-UPS Ultra--
Eaton 9PX--
Riello SentryumUp to 8 units for N+1 or N+N redundancy
Physical / Environmental
Form Factor
APC Smart-UPS Ultra1U rack (43mm H x 432mm W x 560mm D); tower convertible
Eaton 9PX2U rack/tower (1.5–3kVA); 3U rack/tower (6kVA)
Riello SentryumCompact (CPT), Active (ACT), Xtend (XTD) cabinet options
Weight
APC Smart-UPS Ultra15.9kg (3kVA model)
Eaton 9PX--
Riello Sentryum--
Management
Management Interfaces
APC Smart-UPS UltraSmartConnect (built-in Ethernet); USB; optional NMC SmartSlot
Eaton 9PXUSB HID, RS-232; optional NETWORK-M3 Gigabit NMC
Riello SentryumRS-232, USB, dry contacts; optional NetMan 208 SNMP card
Display
APC Smart-UPS Ultra--
Eaton 9PX--
Riello Sentryum5-inch colour touchscreen + LED status indicator
Software & OS Compatibility
Software
APC Smart-UPS Ultra--
Eaton 9PXEaton Intelligent Power Manager (IPM)
Riello Sentryum--
Certifications
APC Smart-UPS Ultra--
Eaton 9PXVMware Ready; Citrix Ready; CE, CB, TUV
Riello SentryumIEC 62040-1, IEC 62040-2, VFI-SS-111
Warranty & Support
Warranty
APC Smart-UPS Ultra5 years including battery
Eaton 9PX3 years electronics and battery
Riello Sentryum--
Compute
Processor
APC Smart-UPS Ultra--
Eaton 9PX--
Riello SentryumDual-core DSP; 3-level inverters at 18kHz

Expert Analysis

AI-assisted analysis based on published specifications

These three UPS systems represent distinct tiers of enterprise power protection, each optimised for different deployment scales and operational requirements. The APC Smart-UPS Ultra excels in space-constrained environments with its 1U form factor and lithium-ion battery technology, offering 8-10 year battery life and rapid 1.5-hour recharge. Its 5-year comprehensive warranty and SmartConnect cloud monitoring make it particularly suitable for distributed IT deployments where physical access is limited. The Eaton 9PX provides a balanced mid-range solution with hot-swappable VRLA batteries and ABM charging technology that extends battery life by up to 50%, complemented by VMware-certified graceful shutdown capabilities through Eaton IPM software.

The Riello Sentryum operates in an entirely different class, supporting up to 120kVA with unity power factor and parallel configurations for eight units, enabling N+1 or N+N redundancy for critical infrastructure. Its transformerless design achieves 96.6% efficiency while maintaining less than 1% output THD, and the three cabinet variants offer flexibility for different cooling and expansion requirements. The dual-core DSP processor and 5-inch colour touchscreen provide sophisticated monitoring and control capabilities appropriate for data centre environments. Organisations should select based on their power requirements, with the APC and Eaton models serving rack-level protection up to 6kVA, while the Riello addresses facility-level needs from 10-120kVA with superior scalability and redundancy options.

APC Smart-UPS Ultra
Best for: Space-constrained rack environments requiring long-life lithium-ion batteries and cloud monitoring
Eaton 9PX
Best for: Mid-range server protection with hot-swappable batteries and certified virtualisation integration
Riello Sentryum
Best for: Large-scale data centre and critical infrastructure with parallel redundancy and unity power factor requirements

Ready to proceed?

Not sure which one fits your environment?

Our UK specialists will recommend the right option for your workload and send itemised pricing — vendor-neutral, no obligation.

Response within 4 business hours · 20+ yr UK reseller

APC Smart-UPS Ultra
View Full Details →
Riello Sentryum
View Full Details →

Want to compare different products or add more to this comparison?

Open Interactive Comparison Tool →
💷 Spread the cost · IT finance

Made your choice? Spread the cost.

Whichever you choose, you don't have to pay for it all upfront — finance your new hardware from £129/mo ex VAT on hire purchase or lease. Compare monthly payments and terms in seconds.

See finance from £129/mo

Indicative estimate · subject to change · no credit check at this stage · hire purchase, lease & subscription for UK businesses

Indicative illustration only. Servnet Limited is not authorised or regulated by the FCA and does not provide financial advice or arrange finance. All finance opportunities are referred to Number Eight Business Finance. Finance policy

From
£129/mo
over 60 months · ex VAT · indicative estimate, subject to change
Next step
Size the UPS for your actual load

Build the load, get the kVA, the runtime and the heat output — then a quote for the unit and batteries.

Other head-to-heads featuring these models — useful if you’re still shortlisting.

Talk to a UK specialist

Get expert advice or a no-obligation quote — servers, storage, networking, maintenance, finance and cloud. We reply the same working day.

or call 0800 987 4111