Vertiv PBRGXT5-48VBAT GXT5 48V UPS Battery Replacement Service Kit
Overview
The Vertiv PBRGXT5-48VBAT is a factory-matched battery replacement kit and service package for the Liebert GXT5 UPS family, specifically validated for the GXT5-1500LVRT2UXL and GXT5-2000LVRT2UXL rack/tower models. If you're running either of those two units in a data center, network closet, or critical-infrastructure rack and you've reached the end of your battery service cycle, this is the OEM-matched replacement path — not a third-party chemistry gamble. The PBRGXT5-48VBAT (often searched as PBRGXT5 48VBAT) includes two years of PRO Refresh Plus coverage, pairing the physical battery swap with a defined service window so your runtime commitment doesn't drift.
Valve-regulated lead-acid chemistry with a 2 × 4 × 12V × 9.0Ah configuration means the battery string is sealed, non-spillable, and maintenance-free once installed — no electrolyte checks, no venting requirements. That matters in enclosed equipment rooms where a flooded cell would be a compliance or safety problem. The 48V nominal bus directly matches the GXT5 internal architecture, so there's no voltage adapter, no reconfiguration, and no guesswork about whether the BMS will recognize the new pack.
Key Features
- Validated GXT5 Compatibility: Engineered specifically for the GXT5-1500LVRT2UXL and GXT5-2000LVRT2UXL. Using a non-validated battery in a UPS with active BMS monitoring can trigger false alarms, incorrect runtime estimates, or premature replacement flags — none of that applies here because this kit is designed around the GXT5 platform from the start.
- Intelligent Battery Health Integration: The Liebert GXT5 UPS uses onboard battery health status monitoring and replacement date prediction. This battery module is designed to communicate within that framework, so the UPS can accurately forecast end-of-life rather than relying on fixed calendar replacement schedules. Facilities teams get actionable data instead of calendar guesses.
- Sealed VRLA Chemistry (2 × 4 × 12V × 9.0Ah): Eight 12V/9.0Ah cells arranged in the correct series string deliver 48V nominal at 72Ah total capacity. Valve-regulated, non-spillable construction eliminates the installation restrictions that come with flooded cells — this can be rack-mounted in any orientation without special provisions.
- Auto-Detection of External Battery Cabinets: The GXT5 platform supports external battery cabinet expansion, and the auto-detection interface means the UPS recognizes added capacity without manual configuration. If your runtime requirements grow, you're not locked into the internal battery footprint.
- UL 1778 4th Edition and CSA 22.2 No. 107.1 Listed: These are the governing North American safety standards for UPS equipment. Meeting both means the battery/service kit has been independently tested to defined fault and overload conditions — a prerequisite for most data-center and commercial facility compliance programs.
- 2-Year PRO Refresh Plus Coverage: The service component bundles battery replacement logistics with a two-year support window. Rather than sourcing the battery, scheduling a technician, and managing disposal separately, the PRO Refresh Plus structure handles those touchpoints as a single contracted deliverable.
- Operating Temperature Range +32°F to +104°F (0°C to 40°C): Standard commercial and data-center ambient ranges are fully covered. If your equipment room runs above 40°C — an underventilated closet in a warm climate, for instance — battery service life will degrade faster regardless of the replacement cycle; stay within spec for rated runtime performance.
Integration and Compatibility
The PBRGXT5-48VBAT integrates exclusively within the Liebert GXT5 UPS ecosystem. Confirmed compatible models are the GXT5-1500LVRT2UXL (1500VA) and the GXT5-2000LVRT2UXL (2000VA). Do not attempt to use this battery kit in earlier GXT4 or GXT3 units — the BMS protocols, connector pinouts, and voltage string configurations differ across generations and cross-generation installation voids the safety listings. If you manage a mixed fleet of Liebert Vertiv UPS systems, verify the model suffix on the UPS nameplate before ordering.
For facilities managing multiple rack-mount UPS units, keeping battery replacement on a defined service schedule is the single most reliable way to avoid runtime surprises during an actual outage. The GXT5's replacement date prediction feature gives you advance notice, but that prediction is only as accurate as the battery data the UPS receives — another reason the OEM-matched kit matters over third-party alternatives. For broader UPS planning guidance, the UPS selection and runtime guide covers how to size battery capacity for your load and target holdover time. If you're also provisioning PDUs or additional power infrastructure downstream of this UPS, confirm the combined load stays within the 1500VA or 2000VA output ceiling of your specific GXT5 unit.
Frequently Asked Questions
Q: Which specific UPS models is the PBRGXT5-48VBAT compatible with?
A: The PBRGXT5-48VBAT is validated for use with the Liebert GXT5-1500LVRT2UXL and the GXT5-2000LVRT2UXL only. It is not interchangeable with earlier GXT-series generations.
Q: What is the battery chemistry and configuration in this kit?
A: The kit uses valve-regulated, non-spillable lead-acid (VRLA) batteries configured as 2 strings × 4 cells × 12V × 9.0Ah, producing a 48V nominal bus with 72Ah total capacity.
Q: Does the PBRGXT5-48VBAT communicate with the GXT5 BMS for health monitoring?
A: Yes. The Liebert GXT5 UPS platform provides battery health status reporting and replacement date prediction. This kit is designed to work within that monitoring framework so the UPS can deliver accurate runtime and end-of-life estimates.
Q: What safety certifications does this battery kit carry?
A: The PBRGXT5-48VBAT is listed to UL 1778 4th edition and CSA 22.2 No. 107.1, the primary North American safety standards for UPS equipment.
Q: What ambient temperature range is supported?
A: Operating temperature is +32°F to +104°F (0°C to 40°C). Sustained operation above 40°C will accelerate capacity degradation and shorten the effective service interval.
Q: Can this battery kit support external battery cabinet expansion on the GXT5?
A: The GXT5 platform supports auto-detection of external battery cabinets, and this kit is compatible with that interface. Additional external capacity can be added without manual BMS reconfiguration.
The spec I keep coming back to on the PBRGXT5-48VBAT is the 2 × 4 × 12V × 9.0Ah VRLA configuration — that's a sealed, non-spillable 48V string that installs without venting provisions or orientation restrictions. In a network closet or IDF stack where you can't dedicate floor space to flooded-cell safety requirements, that matters more than buyers often realize until they're in the middle of a retrofit.
Technical Highlights:
- VRLA Battery String (2 × 4 × 12V × 9.0Ah): Eight cells in a controlled series-parallel arrangement deliver 48V nominal at 9.0Ah per string. Sealed construction means no maintenance interval for electrolyte — install and monitor via the GXT5 BMS.
- BMS-Integrated Health Reporting: The GXT5 UPS provides replacement date prediction based on live battery health data. With this OEM-matched kit in place, those predictions reflect actual cell behavior rather than generic lead-acid calendar estimates, which is the difference between a planned swap and an unplanned outage.
- UL 1778 4th Ed. + CSA 22.2 No. 107.1: Both listings are required for enterprise data-center procurement and many commercial building codes. Third-party batteries frequently don't carry both — worth verifying before substituting.
Deployment Considerations:
- Compatibility is explicitly bounded to the GXT5-1500LVRT2UXL and GXT5-2000LVRT2UXL. If your site has a mixed GXT fleet across generations, pull the model number from the rear nameplate — not the front bezel — before ordering to avoid a cross-generation mismatch.
- Operating temperature ceiling is 40°C (104°F). Equipment rooms that spike above that — especially during HVAC maintenance windows — will compress the effective battery service life below the rated interval. Monitor ambient temp if your room runs warm seasonally.
This kit fits best in single-tenant network rooms and small data halls running GXT5-1500 or GXT5-2000 units where the priority is a clean, documented battery refresh with BMS continuity — not a cost-cutting swap that disrupts health monitoring and voids the safety listing chain.
