1. Product Overview

The GSS-Li Rack Series 1–3kVA is a 1U 19-inch rack-mount online double-conversion UPS built around LiFePO4 (lithium iron phosphate) battery technology, developed by GOTTOGPOWER (ANHUI) CO., LTD for installations where the rack itself imposes constraints that conventional lead-acid rack UPS designs cannot satisfy. Weight, footprint, and battery service life are the three constraints that shape most rack power protection decisions — and LiFePO4 chemistry addresses all three simultaneously within the same 1U 86mm-tall chassis that the GSS Rack (lead-acid) occupies.

Six models cover 1kVA, 2kVA, and 3kVA in RB (rack built-in, 12.8V/9Ah LiFePO4 cells) and RL (rack long-run, external 50Ah or 100Ah LiFePO4 battery packs) variants. The LiFePO4 chemistry delivers 2,000+ deep charge cycles against 200–500 for VRLA, charges at up to 12A on RL models for rapid rack-level recovery, and weighs substantially less per kWh than lead-acid — a meaningful advantage in high-density racks and weight-limited installations such as wall-mount enclosures, mobile equipment racks, and above-ceiling AV infrastructure.

2. Key Features

• LiFePO4 Battery in a 1U Rack Form Factor — Less Weight, Longer Life: Substituting LiFePO4 cells for VRLA lead-acid in a 1U rack UPS cuts battery weight by up to 60% per kWh and extends service life to 2,000+ cycles. For a rack that already carries servers, switches, and patch panels, every kilogram saved in the UPS directly relaxes floor loading and wall-mount bracket specifications — without sacrificing an inch of rack height.
• RB Built-in vs RL External — Two Approaches to Rack-Level Runtime: RB models keep everything self-contained at 440mm depth with factory-installed 12.8V/9Ah cells and up to 4A charging. RL models extend to 580mm depth and connect to standardized 50Ah or 100Ah LiFePO4 battery packs with up to 12A charging — giving data center operators a clear upgrade path from short backup (RB) to extended runtime (RL) without swapping the rack position or requalifying the UPS.
• Standardized High-Capacity LiFePO4 Pack Sizing for RL Models: Unlike lead-acid long-run UPS systems that quote a variable string count, the GSS-Li RL models reference a defined pack capacity — 50Ah or 100Ah — making it straightforward to calculate actual backup runtime for a known load without converting between cell counts, Ah ratings, and string voltages.
• 0ms Mains-to-Battery Transfer — Same Online Protection, New Chemistry: The LiFePO4 cells deliver zero-millisecond transfer to battery just as VRLA cells do in conventional rack UPS — the chemistry change does not affect the online double-conversion topology or the instantaneous response that protects servers and storage from even the briefest power interruption.
• ≥95.5% Efficiency with LiFePO4 Charging Overhead Factored In: LiFePO4 charging characteristics differ from lead-acid, and the GSS-Li Rack's noise specification reflects this honestly — rated at load level and charging current simultaneously (50dB @ >70% load or >6A charge) rather than load level alone, giving operators an accurate acoustic expectation for co-located open-rack deployments.
• Wide 110–300VAC Input — Global Rack Deployment Without Reconfiguration: The same broad input tolerance as the lead-acid GSS Rack: full load from 176–276VAC, proportional derating to 110VAC, and 50% capacity up to 300VAC. One model, one stock SKU, deployable in any single-phase power environment worldwide.

3. Typical Applications

The GSS-Li Rack Series is the preferred rack UPS where lead-acid weight, replacement cycles, or pack size create operational constraints:

• High-Density Server Racks — Weight-Critical Installations: In racks already loaded with 1U/2U servers, dense storage, and patch panels, swapping a lead-acid rack UPS for a GSS-Li RB model reduces the battery contribution to rack weight by 40–60% — keeping the total rack within raised-floor tile loading limits or wall-bracket weight ratings without compromising backup protection.
• Data Center Edge & Remote Site Racks — Long Service Intervals: Edge and remote racks are serviced infrequently. LiFePO4's 2,000+ cycle life means a GSS-Li Rack UPS installed today may outlast two or three lead-acid replacement cycles, reducing the logistics and labor cost of periodic battery swaps at locations that are expensive to visit.
• Healthcare & Clinical Equipment Racks — Low-Maintenance Power Protection: Hospital IT racks in clean rooms, operating theater AV enclosures, and clinical workstation clusters benefit from LiFePO4's stable chemistry and reduced maintenance schedule — fewer battery replacement procedures mean less disruption to clinical environments where scheduled downtime is difficult to arrange.
• Mobile & Portable Rack Enclosures — Transport-Friendly Lithium UPS: Touring AV and broadcast racks, portable command centers, and deployable field communications racks are subject to transport weight and airline/shipping lithium battery regulations that are more favorable for smaller LiFePO4 packs than equivalent lead-acid batteries.
• Wall-Mount & Above-Ceiling AV Enclosures: Installed AV racks mounted to walls or above ceilings have strict weight limits. A GSS-Li RB model provides 1–3kVA of online UPS protection in 1U with a fraction of the weight of a lead-acid equivalent — often the difference between a compliant and a non-compliant installation.
• Finance & Trading Infrastructure Racks — Extended Cycle Durability: Trading floor server racks in markets with unstable grid power may cycle their UPS to battery dozens of times per month. LiFePO4's cycle durability makes the GSS-Li Rack a better long-term investment in high-cycling environments than lead-acid, where frequent partial discharges shorten battery life considerably.

4. Technical Specifications

Note: RB = Rack Built-in LiFePO4 battery (depth 440mm); RL = Rack Long-run, external LiFePO4 pack (depth 580mm). All models are 1U (86mm) height for standard 19-inch rack mounting.

5. Certifications & Compliance

The GSS-Li Rack Series is tested against IEC 62040-3 for UPS performance classification. Output THDu values (≤2% linear, ≤5% non-linear) are measured per IEC 62040-3 test conditions. LiFePO4 battery cells used in RB models comply with applicable lithium battery safety standards; 50Ah/100Ah external battery packs used in RL models carry their own cell-level safety certification.

6. Interfaces & Optional Accessories

Standard Interfaces

EPO and RS232 are standard on all six GSS-Li Rack models. The EPO input is particularly relevant for rack-mount LiFePO4 UPS units deployed in data center rows: a wired EPO connection to the room-level EPO panel ensures the lithium battery system can be safely de-energized from a remote panel in an emergency, complementing the LiFePO4 pack's own cell-level protection circuitry.

Optional Accessories

• SNMP Card — network-addressable monitoring that reports LiFePO4 battery state-of-health, state-of-charge, and cycle count alongside standard UPS status — giving data center teams visibility into lithium battery aging that is not available from a standard SNMP card on a lead-acid system.
• AS400 Card — for environments where the rack UPS must integrate with IBM AS400 / iSeries infrastructure via the AS400 proprietary communication protocol.
• USB — connects the rack UPS to a server's USB port for graceful shutdown via NUT, apcupsd, or similar UPS daemon software, without occupying a serial port on densely configured 1U servers.
• RS485 — Modbus RTU communication for integrating the lithium rack UPS into a data center BMS or DCIM infrastructure that monitors battery state alongside PDU, CRAC, and environmental sensors over a common RS485 bus.
• Air Filter — for GSS-Li Rack deployments in industrial edge racks, open-frame enclosures, or any installation where airborne particulates could reach the LiFePO4 cells and reduce long-term reliability.