# Riello Sentinel Dual UPS 4 kVA 3600 W 3 AC outlets

**URL:** https://aio.lv/en/product--riello-sdu-4000--11472354
**Data updated:** 2026-01-14 13:15 (EET)
**Category:** UPS
**Manufacturer:** Riello
**Manufacturer code:** SDU-4000
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1 610.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 1 331.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--riello-sdu-4000--11472354

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Courier delivery to door | 14.07.2026 | 53.99 EUR |

## Summary description

The Riello Sentinel Dual is a double-conversion online UPS with a capacity of 4 kVA and 3600 W. It features 3 IEC 320 AC outlets and a USB Type-A port. The sealed lead acid battery has a voltage of 96 V and a recharge time of 4 hours. With a rackmount/tower form factor and a 3U rack capacity, it is suitable for various applications, ensuring reliable power supply and protection for critical equipment.

## Long description

The Riello Sentinel Dual UPS 4 kVA 3600 W 3 AC outlets is an online double-conversion uninterruptible power supply designed to deliver continuous, regulated power for critical equipment. With a true on-line topology it provides consistent voltage and frequency regulation, isolating connected devices from input disturbances. The unit offers three IEC 320 AC outlets and a USB Type-A port for basic communications, a sealed lead acid battery system at 96 V and a full recharge time of approximately 4 hours. Its rackmount/tower form factor and 3U height make it suitable for server racks, network closets and compact equipment rooms.
Advantages
The double-conversion design ensures clean, stable output power and zero transfer time to battery during mains disturbances. The 4 kVA / 3600 W power rating supports a broad range of small to medium loads while the sealed 96 V battery provides reliable runtime and reduced maintenance needs compared with flooded batteries. The combined rackmount/tower chassis gives installation flexibility and the compact 3U size saves rack space. Integrated USB Type-A connectivity allows for basic monitoring and shutdown integration with compatible systems.
Suitable for
 Small servers and rack-mounted network equipment
 Storage arrays, NAS devices and backup controllers
 VoIP PBX, network switches and firewalls
 Point-of-sale systems and critical workstations
 Edge computing nodes and remote site cabinets
Key specifications
 Topology: Online double-conversion
 Capacity: 4 kVA / 3600 W
 Output outlets: 3 × IEC 320 AC
 Communication port: USB Type-A
 Battery type: Sealed lead acid (SLA), 96 V
 Battery recharge time: Approximately 4 hours
 Form factor: Rackmount / Tower convertible
 Rack height: 3U
How to use
Install the UPS in a well-ventilated rack or on a stable surface in tower orientation following the manufacturer's mechanical instructions. Connect mains input to a properly rated electrical circuit and plug critical equipment into the IEC outlets. Allow the battery to reach a full recharge after initial installation before relying on the unit for extended runtime. Use the USB Type-A port to connect to monitoring software or a management device for orderly shutdown and event logging when supported. Perform regular visual inspections of connections and battery condition according to usage hours and local safety standards.
Usage recommendations
Locate the UPS in a temperature-controlled environment, avoid excessive dust and humidity, and ensure a minimum clearance around ventilation openings. Verify load levels to keep the continuous power draw within the 3600 W rating, and schedule periodic battery tests and replacements based on measured runtime and battery health to maintain reliable backup performance.

## Specifications

### Ports & interfaces

| Feature | Value |
|---|---|
| AC outlets quantity | 3 AC outlet(s) |
| USB 2.0 ports quantity | 1 |
| Serial interface type | RS-232 |
| Serial ports quantity | 1 |
| RS-232 ports | 1 |
| AC outlet types | IEC 320 |
| Serial interface | Yes |
| Emergency Power Off (EPO) connector | Yes |
| USB port | Yes |
| USB port type | USB Type-A |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Sealed Lead Acid (VRLA) |
| Battery recharge time | 4 h |
| Battery weight | 28 g |
| Battery voltage | 96 V |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |
| Form factor | Rackmount/Tower |
| Rack capacity | 3U |
| International Protection (IP) code | IP20 |
| Cooling type | Active |
| Display type | LCD |
| Built-in fan | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 38 kg |
| Height | 448 mm |
| Width | 131 mm |
| Depth | 640 mm |
| Battery width | 131 mm |
| Battery depth | 448 mm |
| Battery height | 640 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating altitude | 1000 - 4000 |
| Operating relative humidity (H-H) | 5 - 95 |
| Storage temperature (T-T) | 15 - 60 |
| Operating temperature (T-T) | 0 - 40 |

### Packaging content

| Feature | Value |
|---|---|
| Manual | Yes |
| Quick installation guide | Yes |
| Rack mount kit | Yes |

### Certificates

| Feature | Value |
|---|---|
| Certification | European directives: L V 2014/35/EU low voltage; EMC 2014/30/EU electromagnetic compatibility -- Standards: Safety IEC EN 62040-1; EMC IEC EN 62040-2; RoHS compliant -- Classification in accordance with IEC 62040-3 VFI - SS - 111 |
| Compliance certificates | RoHS |

### Features

| Feature | Value |
|---|---|
| Emergency Power Off (EPO) | Yes |
| Output power capacity | 4 kVA |
| Noise level | 48 dB |
| Input frequency | 50/60 |
| Maximum current | 18.5 A |
| Efficiency | 95 % |
| Output power | 3600 W |
| Power protection features | Short circuit, Overheating, Overdischarge, Over voltage, Input fuse, Battery discharge, Over current |
| Power factor | 0.98 |
| Input current Total Harmonic Distortion (THD) | 1 % |
| Output voltage Total Harmonic Distortion (THD) | 3 % |
| Surge protection | Yes |
| Crest factor | 3:1 |
| Input operation voltage (max) | 240 V |
| Input operation voltage (min) | 220 V |
| Output operation voltage (min) | 220 V |
| Output operation voltage (max) | 240 V |
| Output frequency | 50/60 |
| ECO mode | Yes |
| Number of input phases | 1 |
| Number of output phases | 1 |
| Input power factor | 0.98 |
| Waveform | Sine |
| UPS topology | Double-conversion (Online) |

### Safety regulation & standards

| Feature | Value |
|---|---|
| Safety | CEI EN 62040-1 |

## FAQ

### How much does the Riello Sentinel Dual UPS 4 kVA cost, and is it available for purchase?

The price is 1,610.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Riello products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Riello service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: ac outlets quantity, usb 2.0 ports quantity, weight, output power, output power capacity, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Riello Sentinel Dual UPS 4 kVA?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/11472354/66114539_large.webp