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LiFePO4 battery cabinet for UPS and data center backup with active balancing BMS

Lithium Battery for UPS Backup Power Systems

A practical guide to choosing LiFePO4 backup for UPS and data-center loads. We cover how to match your DC bus, confirm charger compatibility, size runtime and replace lead-acid — then point you to the XGW UPS battery product range (48V-409V, up to 6C high-rate) for the actual specs and quote.

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Why Lithium for UPS?

Every XGW UPS lithium battery is integrated with Tier-1 LFP cells (CATL / BYD / EVE) and an active-balancing BMS, so the pack holds its capacity and safety margins across the full service life.

See the full comparison in LiFePO4 vs VRLA Battery and the step-by-step VRLA-to-LiFePO4 Retrofit Checklist.

How to Select a Lithium Battery for Your UPS

  1. Match the DC bus. 48V for small modular UPS; 192V / 384V / 409V for central strings. The XGW UPS battery range spans 48V to 409V.
  2. Confirm charger compatibility. Verify the UPS charger voltage and current against the LiFePO4 charge profile — send us the UPS model and we confirm the fit before you order.
  3. Size the runtime. Capacity (Ah) ≈ load (W) × backup hours / (bus voltage × efficiency). A 5kW load on 48V for 2h is roughly 230Ah.
  4. Check the discharge rate. Online UPS loads include inrush; XGW packs support up to 6C peak to absorb it.
  5. Choose the communication. CAN / RS485 as standard, SNMP optional, so the battery reports to your DCIM / BMS platform.

Deeper reading: UPS Lithium Battery Selection · LiFePO4 vs VRLA · Retrofit Checklist

Matching Tier-1 UPS Brands (APC, Eaton, Vertiv)

XGW LiFePO4 battery cabinets are built as drop-in replacements for the DC bus of major UPS platforms including APC, Eaton and Vertiv. They run as standard VRLA replacements on voltage and float-charge parameters, so the battery deploys regardless of brand. For full battery-to-UPS communication — state-of-charge, alarms and shutdown signalling — we adapt the BMS to the host protocol: send us your UPS model and we integrate to its communication protocol. If the host protocol is not available, we ship with our standard CAN / RS485 BMS and the system runs in standalone voltage mode. In every case the pack is sized and confirmed against your UPS before you order.

High-Rate Discharge for UPS Loads

UPS batteries must deliver peak power, not just energy. XGW's high-rate lithium battery for UPS supports discharge up to 6C — enough to carry the inrush and peak loads of an online UPS where a VRLA string would sag. The range spans 48V to 409V, drops into existing cabinets as a VRLA replacement, and reports through CAN/RS485 with a BMS managing cell balance and temperature. See the product page for the full voltage and configuration list.

UPS Battery Datasheets by Model

Download the LiFePO4 UPS battery specification sheet for the exact configuration you need. Each PDF opens in a new tab.

Frequently Asked Questions

How do I check lithium battery compatibility with my UPS?

Match the battery DC bus to your UPS: 48V for small modular systems, 192V/384V/409V for central UPS strings. Then confirm the charger voltage and current against the LiFePO4 charge profile. XGW maps configurations to all major UPS platforms — send us your UPS model and we confirm the fit before you order.

What discharge rate is required for my UPS?

Online UPS loads include inrush and peak currents, so the battery must deliver high power without voltage sag. XGW UPS lithium batteries support up to 6C peak discharge, which carries UPS inrush and high peak loads that a VRLA string cannot. Tell us the DC bus voltage and required backup time and we size the pack.

How do I calculate the required battery capacity?

Capacity (Ah) = load power (W) × backup time (h) / (bus voltage × efficiency). A 5kW load on a 48V bus for 2 hours is roughly 5,000 × 2 / (48 × 0.9) ≈ 231Ah. Our UPS battery product page lists 48V-409V options; for a worked example see the runtime guide.

What information is needed to select a replacement battery?

Share your UPS model, DC bus voltage, required backup time and load power. With those we confirm the LiFePO4 pack, the BMS communication (CAN / RS485, SNMP optional) and any cabinet or terminal adaptation, then return a datasheet and quote.

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Need a UPS Lithium Battery?

Tell us your UPS model and backup time. We confirm the fit and return a datasheet within 24 hours.

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