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Online Double-Conversion
Sentinel Dual SDH uses true online double-conversion topology — the load is always powered through the inverter, providing complete isolation from all mains irregularities. Zero transfer time on mains failure.
UK’s trusted IT infrastructure partner since 2003
3kVA Max Power
3000VA online double-conversion
0ms Transfer
Online zero transfer time
0.98 Power Factor
Input PF > 0.98
92% Efficiency
Online mode
Hot Swap Battery
User replaceable, no shutdown
2U Form Factor
Rack or tower convertible
✅ Authorised Reseller
📦 Free UK Delivery
🔒 Full Warranty
📞 24/7 Support
Download Official Datasheet
PDF · Official manufacturer document
RielloSKU: SDH-3000
Riello Sentinel Dual SDH Online UPS — 1–3 kVA Single Phase
Italian Engineering. Pure Online Protection. 1–3 kVA.
The Riello Sentinel Dual SDH is a compact online double-conversion UPS delivering 1000VA to 3000VA in a 2U rack/tower form factor — with hot-swap user-replaceable batteries, rotatable LCD display, >0.98 power factor, and 92% online efficiency.
- Online double-conversion topology — complete electrical isolation, zero transfer time
- 1000VA, 1500VA, 2200VA, and 3000VA models; 2U rack or tower installation
- Hot-swap, user-replaceable batteries — no UPS shutdown required for battery maintenance
- >0.98 input power factor; reduces reactive current draw on building circuits
- 92% efficiency in online mode; rotatable 90-degree LCD for rack or tower orientation
- Overload capacity: up to 150% for 10s; short circuit protection
- Compatible with Riello NetMan 208 network management card for SNMP monitoring
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Key Features
Everything you need in one device
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Hot-Swap User-Replaceable Batteries
SDH batteries can be replaced without powering down the UPS — connected equipment remains protected throughout battery maintenance. Batteries slide out from the front panel and can be replaced in minutes without tools.
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Rotatable LCD Display
The LCD panel rotates 90 degrees — displaying correctly in both rack (horizontal) and tower (vertical) orientations. Shows load %, battery %, estimated runtime, input/output voltage, and fault alarms.
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High Input Power Factor
Input power factor >0.98 means the SDH draws close to its true power rating in amps — minimising reactive current on building circuits, reducing cable sizing requirements, and enabling more UPS units per circuit breaker.
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NetMan Network Management
Optional Riello NetMan 208 network management card provides SNMP v1/v2c/v3, Modbus TCP, and web interface remote monitoring — compatible with standard DCIM platforms and building management systems.
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150% Overload Capacity
SDH supports 150% overload for 10 seconds before transferring to bypass — providing headroom during load surge events such as server boot storms or storage spin-up without causing premature bypass.
About the Riello Sentinel Dual SDH
The Riello Sentinel Dual SDH is Riello's primary single-phase online UPS for server room and IT rack applications, available from 1000VA to 3000VA in a 2U rack/tower form factor. Riello has manufactured professional UPS systems since 1982, and the SDH reflects decades of European data centre market experience.
The SDH's online double-conversion topology provides complete electrical isolation of connected equipment from the mains supply — all power passes through the rectifier, battery bank, and inverter stages continuously, eliminating all mains-borne power quality issues. Input power factor correction (>0.98) reduces the apparent power drawn from the building circuit.
Hot-swap front-accessible batteries are a practical differentiator — many competing units require UPS shutdown and significant disassembly for battery replacement. The SDH's tool-free battery replacement keeps the UPS operational and connected equipment protected throughout battery maintenance. The optional Riello NetMan 208 card adds full SNMP/web management compatible with standard NMS and DCIM platforms.
Technical Specifications
📄 Download Datasheet (PDF)Use Cases
Ideal for a wide range of deployments
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Server Room Rack Installation
SDH 2U profile fits cleanly in 19-inch server cabinets alongside Dell PowerEdge, HPE ProLiant, or Lenovo ThinkSystem servers, providing online protection with minimal rack overhead.
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Healthcare IT Edge Sites
NHS trusts use SDH for ward-level server rooms and clinical workstation power protection — hot-swap batteries enable maintenance during clinical hours without exposing medical IT to unprotected power.
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Industrial & SCADA Protection
High overload capacity and online isolation suit industrial control system servers and SCADA workstations where load surges and mains disturbances from motor drives are common.
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Office IT Infrastructure
Tower SDH models protect office server rooms and communications cabinets housing VoIP, CCTV, and access control systems — hot-swap batteries enable maintenance without business disruption.
FAQ
Frequently Asked Questions
Why Servnet
Why buy from Servnet?
Trusted UK IT reseller since 2003 — supplying businesses of all sizes with genuine, competitively priced technology.
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Authorised UK Reseller
Servnet is an authorised IT reseller with direct access to leading product lines at competitive pricing.
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Expert Pre-Sales Advice
Our engineers will help you select the right product and advise on compatibility with your existing infrastructure.
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Fast UK Delivery
Most products ship from UK stock. Express delivery available for urgent deployments.
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Genuine, Warranted Kit
All products are genuine, brand-new, with full manufacturer warranty and RMA support.
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Configuration Services
We can pre-configure your hardware before shipping — reducing on-site deployment time and cost.
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24/7 Support
Post-sale support from our certified engineers. We're here if anything goes wrong.
