Description
Vertiv Liebert PSI5 UPS – 3000VA Line Interactive, Rackmount – PSI5-3000RT120 โ Replacement Battery
This specification-matched battery set is engineered to match the Liebert PSI5 UPS – 3000VA Line Interactive, Rackmount – PSI5-3000RT120’s discharge profile, internal resistance, and physical footprint โ no firmware re-calibration required.
What This Battery Fits
- Vertiv Liebert PSI5 UPS – 3000VA Line Interactive, Rackmount – PSI5-3000RT120
Certifications & Quality
- U.L. Recognized and CE Certified
- Brand new โ factory-sealed, never used
- Quality-tested for capacity and internal resistance
- manufacturer warranty included
UPS Specifications
- Cell chemistry: VRLA sealed lead-acid (no maintenance, no electrolyte top-up)
- Designed for: High-rate discharge under sustained UPS load
- Stored charge retention: Excellent โ minimal degradation in standby
- Mechanical: Vibration-rated, factory-sealed against leakage
- Form factor: Drop-in compatible, no bracket modification required
In the Box
- One Vertiv UPS unit for the Vertiv Liebert PSI5 UPS – 3000VA Line Interactive, Rackmount – PSI5-3000RT120
- Installation guidance (see below)
Before You Install
Schedule the swap into your next maintenance window. Capacity should hold for 5-10 minutes off battery during the swap on most units; verify your specific Liebert PSI5 UPS – 3000VA Line Interactive, Rackmount – PSI5-3000RT120 bypass behaviour first.
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Independent Canadian Vertiv / Liebert UPS service specialists since 2012.

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