The Eaton 5P1550GR is a rackmount UPS designed for data center environments, offering 1550 VA / 1100 W capacity with true sine wave output. Reviewers noted its compact 1U form factor and 6 C13 outlets with programmable groups for managing critical and non-critical equipment. The unit features ABM battery management technology that extends battery life and provides advance warnings for replacement. While the device offers solid performance for its class, reviewers pointed out that battery replacement requires user intervention and the included power cord is only 6 feet long. This UPS is best suited for users requiring reliable power protection in rackmount environments.
Full review
Product Overview and Specifications
This unit delivers 1550 VA/1100W of power backup capacity with six C13 outlets, operating at 230V nominal voltage. According to the official specifications from AllDataResource, the device features a line-interactive topology with true sine wave output and includes an optional Gigabit Network Card slot for remote management capabilities. The unit weighs 42.7 pounds and measures 21.8 x 17.4 x 1.7 inches, making it suitable for rack installations where space efficiency is paramount. StorageReview.com notes that the 5P1550GR-L model specifically uses lithium-ion (LiFePO4) battery technology, which provides higher energy density and extended lifespan compared to conventional lead-acid batteries.
The device supports input voltage ranges from 160-294V and operates within frequency ranges of 47-70Hz for 50Hz systems and 56.5-70Hz for 60Hz systems. It features a 3-year warranty on electronics and batteries with registration, along with compliance certifications including FCC Part 15 Class A, UL 1778, and cULus Listed standards. The Eaton 5P 1550 also includes rear terminal block connectors for remote on/off and power off functionality, with ROO/RPO (Remote On/Off) capabilities. The LCD graphical display provides status information and basic interface control, while the unit includes both USB and RS-232 console ports for communication with management systems.
Build Quality and Design
ServeTheHome's Patrick Kennedy reviewed the Eaton 5P 1U lithium-ion rack battery unit and noted its functional but basic design approach. The unit arrives with the battery disconnected, which is standard for shipping, and features direct access to the battery connection points without requiring panel removal or disassembly. The front terminal location allows for battery connection, followed by a black cover placement to protect the wires. A blue faceplate snaps into the middle, providing a clean aesthetic while maintaining accessibility. Kennedy emphasized that the unit felt intuitive and functional, though basic in design approach. The rear of the system features five outlets with two labeled groups and different colored connectors (black for critical equipment, green for ROO/RDO control), along with USB and RS232 console ports.
The device includes a fan for thermal management and a 5-15P power cord for 120V systems, though the included cable is only about 6 feet long, which Kennedy noted as slightly surprising. The network card slot is covered by a black card slot cover, and the unit supports optional Gigabit Network Card installation for enhanced management capabilities. Kennedy's review highlighted that while the total installation time took under a minute (excluding photography), the process was straightforward and well-suited for rack environments. The unit's design prioritizes functionality over aesthetics, with a focus on providing reliable power backup in data center environments.
Performance and Efficiency
According to StorageReview.com, the Eaton 5P1550GR-L achieves an impressive 98% efficiency rating, which is particularly notable for a line-interactive UPS design. The unit's lithium-ion battery technology provides higher energy density and extended lifespan compared to traditional lead-acid batteries, with the manufacturer claiming an 8-year battery life. This extended battery life eliminates the need for frequent replacements, which is a significant advantage for organizations requiring long-term power backup solutions. The device's 1100W/1550VA capacity makes it suitable for protecting networking equipment, storage devices, servers, and multiple workstations from power issues that could result in financial losses.
The UPS features online voltage regulation within 230V: 184-256Vac and maintains a frequency tolerance of ±0.1Hz, ensuring stable power delivery during normal operations. The device also includes surge and spike protection, which is standard for UPS units, but the lithium-ion battery technology provides additional benefits in terms of longevity and performance consistency.
What Reviewers Loved
Both ServeTheHome and StorageReview.com reviewers praised the Eaton 5P 1550's lithium-ion battery technology and its extended lifespan. Kennedy noted that the unit's lithium-ion implementation aligns well with support contracts requiring 5-year service plans, as opposed to traditional lead-acid batteries that typically have shorter service lives. The high energy density and smaller footprint of the Li-ion batteries were highlighted as key advantages, particularly for data center environments where rack space is at a premium. The 98% efficiency rating was also mentioned as a standout feature, indicating excellent power conversion and minimal energy waste.
StorageReview.com emphasized that the 5P1550GR-L's lithium-ion battery implementation addresses the common issue of battery replacement costs and frequency in traditional UPS units. The device's ability to provide extended runtime without requiring frequent battery changes was seen as a significant cost advantage over traditional lead-acid solutions. Additionally, the unit's rackmount form factor and compact 1U design make it suitable for environments where space efficiency is crucial. The optional Gigabit Network Card support was also appreciated by reviewers for enabling remote management capabilities, which is essential for large-scale deployments.
Where It Falls Short
Several concerns were raised by community members and reviewers regarding the Eaton 5P 1550's battery replacement challenges. According to a Spiceworks community discussion, users have reported significant difficulties finding replacement batteries, with one user stating they couldn't find a battery even from Eaton directly. The battery is described as having a control board and proprietary cells that make replacement extremely difficult, requiring either entire cartridge replacements or specialized third-party solutions. This issue was further highlighted in a Reddit discussion where a user reported purchasing a unit from eBay only to discover the battery was already faulty and the replacement process was nearly impossible.
The high cost of the unit was also a concern, with one reviewer noting the $2100 MSRP price tag and the difficulty in finding replacement batteries. The unit's lithium-ion battery technology, while offering advantages in longevity, also comes with a premium price point compared to traditional lead-acid solutions. Additionally, the 6-foot power cord was noted as being shorter than expected, which may require users to purchase additional cables for optimal rack placement. The complexity of battery replacement and the lack of readily available replacement parts were identified as significant drawbacks that could lead to costly repairs or complete unit replacement.
Who It's Best For
The Eaton 5P 1550 is best suited for enterprise environments and data centers that require reliable, high-capacity power backup solutions with extended battery life. Organizations that operate critical infrastructure such as networking equipment, storage devices, servers, and multiple workstations would benefit most from this unit's 1100W/1550VA capacity and line-interactive topology. The rackmount 1U form factor makes it ideal for environments where space efficiency is crucial, particularly in server rooms or telecommunications facilities where rack space is limited. According to StorageReview.com, the unit is designed for SMBs and enterprise users who need a high-efficiency UPS with lithium-ion battery technology that provides extended service life.
However, the unit may not be ideal for home users or small office environments due to its high cost and the complexity of battery replacement. The requirement for specialized replacement parts and the potential difficulty in finding compatible batteries makes it less attractive for users who might need to replace the unit after a few years. The device is also not recommended for users who operate at very high loads, as the 1100W capacity may not be sufficient for high-power equipment. Organizations that prioritize long-term cost savings and extended service life over initial purchase price would find the Eaton 5P 1550 to be a strong investment, particularly those with existing support contracts that require 5-year service plans.
How It Compares to Alternatives
When compared to traditional lead-acid battery UPS units, the Eaton 5P 1550 offers significant advantages in terms of battery lifespan and energy density. While traditional UPS units typically require battery replacement every 3-5 years, the lithium-ion technology in the 5P 1550 provides an 8-year battery life, significantly reducing long-term maintenance costs. However, this advantage comes with a higher upfront cost, as lithium-ion batteries are more expensive than their lead-acid counterparts. StorageReview.com noted that while the initial investment may be higher, the total cost of ownership is expected to be lower due to reduced battery replacement frequency.
In comparison to other rackmount UPS solutions, the Eaton 5P 1550's 1U form factor and compact design make it more space-efficient than many alternatives. The unit's 98% efficiency rating is competitive with other high-end UPS models, and the optional Gigabit Network Card support provides enhanced management capabilities that are often lacking in competing products. However, the difficulty in finding replacement batteries and the complexity of the replacement process may make it less attractive than alternatives that offer more readily available parts or simpler maintenance procedures.
Value at This Price
The Eaton 5P 1550's $1,782.36 price point represents a significant investment, particularly when compared to traditional lead-acid battery UPS units that typically cost less than half as much. However, StorageReview.com argues that the unit's lithium-ion battery technology and extended 8-year lifespan provide long-term value that justifies the higher upfront cost. The device's 98% efficiency rating and rackmount 1U form factor also contribute to its value proposition, particularly for organizations that require high-capacity power backup in space-constrained environments. The optional Gigabit Network Card support adds management capabilities that are often priced separately in competing products.
Despite the high price point, the unit's extended battery life and reduced maintenance requirements make it attractive for organizations that operate critical infrastructure and cannot afford unexpected power outages. The 5-year warranty on electronics and batteries with registration provides additional value, though the difficulty in finding replacement batteries may limit the long-term value proposition for some users. The unit's ability to provide extended runtime without requiring frequent battery changes makes it a cost-effective solution for organizations that prioritize reliability over initial purchase price, particularly those with existing support contracts that require 5-year service plans.
Strengths
- +1U rackmount form factor with compact footprint suitable for data center environments
- +True sine wave output waveform for reliable power delivery to sensitive equipment
- +6 C13 outlets with programmable groups for critical and non-critical device management
- +ABM battery management technology extends battery service life by 50% with advance warning for replacement
- +Optional Gigabit Network Card (Network-M2) adds network manageability features
Watch-outs
- −Battery replacement requires user intervention and is not plug-and-play
- −Limited runtime options without extended battery capability
- −Power cord is only 6-foot length which may require additional cable management
How it compares
The Eaton 5P 1550 offers a 1U rackmount form factor and true sine wave output, features not available in the Tripp Lite OMNI 1500LCD. However, it requires user intervention for battery replacement and has a shorter power cord compared to the more user-friendly APC Back-UPS Pro 1500VA.
Who this is for
At a glance: data center users needing rackmount protection.
Why you’d buy the Eaton 5P 1550
- 1U rackmount form factor with compact footprint suitable for data center environments.
- True sine wave output waveform for reliable power delivery to sensitive equipment.
- 6 C13 outlets with programmable groups for critical and non-critical device management.
Why you’d skip it
- Battery replacement requires user intervention and is not plug-and-play.
- Limited runtime options without extended battery capability.
- Power cord is only 6-foot length which may require additional cable management.
Rating sources
“I have 2 non-working UPS, and one bad battery. I am needing a little advice on what to do next.”
“For users looking for the aforementioned benefits, this is the way to go.”
Our 4.0 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
