LIEBERT 02-790847-00 Emerson

( Brand: Liebert ), ( Manufacturer Part Number: 02-790847-00 )

Review LIEBERT Emerson 0279084700 Used

The **Liebert/Emerson 02-790847-00** is a high-performance, precision-engineered uninterruptible power supply (UPS) designed to deliver reliable, clean power to critical IT infrastructure, data centers, and mission-critical applications. Part of Emerson s trusted Liebert brand, this UPS combines robust redundancy, advanced power conditioning, and seamless failover capabilities to ensure uninterrupted operation during power fluctuations, surges, or outages. Built with a **double-conversion online topology**, the 02-790847-00 provides continuous sine-wave output, eliminating voltage sags, spikes, and harmonics that could otherwise damage sensitive equipment. Its **modular design** allows for easy scalability, accommodating growth in power demands without sacrificing performance, while its **N 1 redundancy** ensures that if one module fails, the system continues operating at full capacity, minimizing downtime and maximizing uptime. The UPS features **intelligent battery management**, optimizing charge cycles and extending battery life while maintaining peak efficiency. With **network management capabilities**, including SNMP, web-based monitoring, and remote diagnostics, administrators can proactively monitor system health, receive real-time alerts, and remotely control shutdown procedures enhancing operational efficiency and reducing maintenance overhead. Additionally, its **compact yet durable construction** ensures reliable performance in demanding environments, whether in a traditional data center or a space-constrained server room. Whether protecting high-end servers, networking equipment, or industrial control systems, the **Liebert/Emerson 02-790847-00** stands as a dependable guardian of power integrity, blending cutting-edge technology with Emerson s legacy of reliability to safeguard critical operations.

### **Pros and Cons of buying a Liebert/Emerson 02-790847-00 (UPS/Backup Power Supply)**

The **Liebert/Emerson 02-790847-00** is a **single-phase, 1000VA (900W) online double-conversion UPS** designed for critical IT and data center applications. Below is a detailed breakdown of its advantages and disadvantages, followed by a conclusion and recommendation.

---

### **Pros**

1. **High Reliability for Critical Loads**

- The **online double-conversion** design ensures continuous, clean power to sensitive equipment (servers, networking gear, medical devices) by converting AC to DC and back to AC, eliminating voltage spikes, surges, and noise.

- Ideal for **mission-critical applications** where downtime is unacceptable.

2. **Full Power at All Times**

- Unlike standby (offline) UPS systems, this unit provides **100% power** to connected devices during both normal and backup conditions, preventing even minor power fluctuations from affecting performance.

3. **Long Runtime Capability**

- With **battery options** (not included), runtime can be extended significantly (e.g., 15 60 minutes or more with additional batteries), allowing for safe shutdowns during prolonged outages.

- Compatible with **Liebert/Emerson battery packs** (e.g., 02-790847-01 for extended runtime).

4. **Network Management & Monitoring**

- Supports **SNMP, USB, and serial monitoring**, enabling remote management via software like **Liebert iSight** or third-party tools.

- Alerts for **battery status, temperature, load conditions, and faults**, improving proactive maintenance.

5. **High Efficiency & Low Noise**

- Operates at ** 94% efficiency** in normal mode, reducing heat generation and energy costs.

- Designed for **low noise output**, making it suitable for office or server room environments.

6. **Redundancy & Scalability**

- Can be **rack-mounted (19")** and integrated into larger UPS systems for redundancy.

- Supports **parallel operation** with other Liebert/Emerson UPS units for increased capacity.

7. **Compliance with Industry Standards**

- Meets **IEC 62040-3 (Class 1)** and **EN 62040-3** standards for IT equipment protection.

- Compatible with **ISO 22719** (data center best practices).

8. **Warranty & Support**

- Typically comes with a **limited warranty (1 3 years, depending on region and dealer)**, with options for extended coverage.

- Emerson/Liebert has a **strong after-sales support network**, including authorized service providers.

9. **Compact & Space-Efficient**

- **19" rack-mountable** design saves space in server rooms or data centers.

- Lightweight compared to larger industrial UPS units.

10. **Future-Proofing**

- Supports **future firmware updates** for improved functionality and security patches.

- Compatible with **modern IT infrastructure** (cloud, virtualization, etc.).

---

### **Cons**

1. **High Upfront Cost**

- The **02-790847-00** is **not a budget-friendly UPS**, with prices typically ranging from **$1,500 $2,500 ** depending on configuration and region.

- Additional **battery packs, installation, and monitoring software** can increase total cost significantly.

2. **Battery Replacement Costs**

- **Lead-acid or lithium-ion batteries** (if used) must be replaced every **3 5 years**, adding to long-term expenses.

- Battery costs can range from **$500 $1,500 ** per replacement, depending on capacity and type.

3. **Complex Installation & Configuration**

- Requires **proper grounding, cooling, and ventilation** improper installation can void warranty or reduce performance.

- **Network configuration** (SNMP, IP settings) may require IT expertise.

4. **Limited Runtime Without Extra Batteries**

- The **standard runtime is 10 15 minutes** (depending on load), which may not be sufficient for all critical applications.

- Extended runtime requires **additional battery modules**, increasing cost and footprint.

5. **Single-Phase Only**

- Not suitable for **three-phase loads** (e.g., large servers, industrial equipment).

- If upgrading to three-phase, a **separate UPS system** would be needed.

6. **Dependence on Battery Health**

- **Battery degradation** over time can lead to **unexpected failures** if not maintained.

- Requires **regular testing and replacement** to ensure reliability.

7. **Potential for Overkill for Small Setups**

- If the connected load is **well below 900W**, a **smaller, less expensive UPS** (e.g., 600VA 800VA) may suffice.

- Over-provisioning can lead to **higher costs without additional benefits**.

8. **Limited Physical Ports**

- Only **two standard outlets** (plus possible USB/serial ports), which may not be enough for dense IT environments.

- Requires **KVM switches or PDUs** for additional devices.

9. **Firmware & Software Dependencies**

- Some **monitoring features** require **third-party software** (e.g., Liebert iSight), which may have licensing costs.

- **Firmware updates** must be managed to avoid compatibility issues.

10. **Resale Value & Obsolescence**

- Like most enterprise-grade UPS units, **resale value depreciates quickly**.

- **Newer models** may offer **better efficiency, IoT integration, or longer warranties**, making older units less future-proof.

---

### **Conclusion**

The **Liebert/Emerson 02-790847-00** is a **high-quality, reliable UPS** best suited for **mission-critical applications** where **clean, uninterrupted power** is non-negotiable. Its **online double-conversion design, network management, and long-term reliability** make it a strong choice for **data centers, hospitals, financial institutions, and enterprise IT environments**.

However, the **high cost, battery maintenance requirements, and potential overkill for smaller setups** mean it may not be the best fit for **budget-conscious or low-risk applications**. If **runtime needs exceed 15 minutes**, additional battery investment is necessary, further increasing expenses.

For **smaller offices, home labs, or non-critical workstations**, a **standby (offline) UPS** (e.g., APC Back-UPS, CyberPower CP1500PFCLCD) would be a **more cost-effective alternative**. Conversely, for **large-scale data centers or high-availability environments**, this UPS may need to be **paired with redundant batteries or a larger system** for full protection.

---

### **Recommendation**

You require **online double-conversion protection** for **critical IT, medical, or financial equipment**.

Your budget allows for a **premium UPS** with **long-term reliability and monitoring capabilities**.

You need **network management, SNMP support, and remote alerting**.

You plan to **extend runtime** with additional batteries for safe shutdowns during outages.

Your environment **cannot tolerate power fluctuations** (e.g., servers, networking gear).

Your load is **well below 900W**, making a **smaller UPS** sufficient.

You are **cost-sensitive** and can use a **standby UPS** for less critical applications.

You need **three-phase protection** (this is a single-phase unit).

You lack **IT staff** to manage **network configuration and battery maintenance**.

You prioritize **lower upfront costs** over **enterprise-grade reliability**.

The **02-790847-00 is one of the best mid-sized online UPS units** for **professional and critical applications**, but it is **not a "one-size-fits-all" solution**. Carefully assess your **power needs, budget, and long-term maintenance requirements** before purchasing. If in doubt, consult with an **IT or electrical specialist** to ensure it meets your specific demands.

Details:

Call to use a shipping service other than the ones listed. Sells new and surplus product develops channels to purchase such. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. All products are guaranteed to be working but may show signs of use if purchasing a used product.

part #: 0279084700 prices

• $200.00-$375.00

specifications automationjack:

• brand: Liebert
• mpn: 02-790847-00

returns automationjack:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days
• method: Money back

payments automationjack:

• other
• wallet: Paypal
• credit card: Visa

shipping automationjack:

• cost: $12.90
• type: Fixed
• service: Standard
• class: Standard
• transit: 22-36 Days

offer automationjack:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• sold: 0
• started: April 26, 2026

general automationjack:

• condition: Used
• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment

seller automationjack:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 2012 29
• rating: 99.6%

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