384V 200Ah LiFePO4 UPS Battery for Data Centers & Hospitals in Saudi Arabia
The Challenge
- Critical facilities in Saudi Arabia — data centers and hospitals — run UPS systems on VRLA strings. Gulf ambient temperatures regularly reach 45-50℃, and VRLA life roughly halves for every 8-10℃ above its 25℃ rating. Strings sized for a five-year service life were failing well before that, which is unacceptable for a hospital or a Tier-3 data center.
- The second issue was communication. The UPS host could not read the battery's state of charge, state of health or cell-level alarms, so the battery was treated as an unknown load: runtime estimates stayed conservative and fault detection depended on periodic manual checks.
- Battery replacement also had to happen without taking the protected load offline, and the operator needed multiple units delivered and commissioned as a coordinated batch rather than piecemeal.
The Solution
- We supplied 384V 200Ah LiFePO4 battery strings — 120 cells in series, 76.8 kWh per string — built to drop into the UPS DC bus voltage window. Each string is a direct replacement for the existing VRLA bank: same nominal voltage band, same cabinet footprint, no change to the UPS itself. The packs are built with Grade-A LiFePO4 cells from Tier-1 suppliers (CATL, BYD, EVE), which gives consistent internal resistance and cycle behaviour across a five-unit parallel deployment.
- The part the customer cared about most was protocol matching. Our BMS was configured to speak the UPS host's protocol (Modbus RTU/TCP over RS485, with CAN as an alternative), so the UPS reads real SOC, SOH, cell voltages, temperatures and alarm states directly. Runtime prediction becomes accurate, and alarm thresholds are handled by the UPS rather than by a separate panel.
- For the thermal side, the enclosure uses high-temperature-tolerant cells with a BMS that derates charge current as cell temperature rises, plus active ventilation. The result is a pack that tolerates Gulf ambients instead of ageing out of them. All packs are UN38.3 certified for safe transport and deployment.
VRLA Baseline vs LiFePO4 (200Ah)
| Item | Typical VRLA bank | LiFePO4 as supplied (200Ah) |
|---|---|---|
| Chemistry | VRLA lead-acid | LiFePO4 (CATL / BYD / EVE Grade-A) |
| Nominal voltage | 384V DC | 384V DC (120S LiFePO4) |
| Capacity | 200 Ah | 200 Ah (76.8 kWh per string) |
| Communication with UPS host | Terminal voltage sensing only | Modbus RTU-TCP over RS485, CAN optional |
| Data available to UPS | Terminal voltage only | SOC, SOH, cell voltage, cell temperature, alarms |
| Behaviour at 45-50℃ ambient | Accelerated ageing, capacity fade | BMS-managed, charge current derated by temperature |
| Transport certification | n/a | UN38.3 |
Results
- Deployed in 5-unit batches across Saudi data center and hospital sites, with a total installed capacity of approximately 384 kWh per site (5 × 76.8 kWh strings).
- The installation is engineered for Gulf ambient temperatures: the BMS derates charge current as cell temperature rises, which is the behaviour that protects cycle life through sustained heat.
- Because the BMS speaks the UPS host's protocol, battery state is reported straight into the UPS and monitoring platform — no separate battery panel to maintain.
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Case Study FAQ
Why is the UPS battery voltage 384V?
384V DC is a common DC-bus voltage for mid-to-large UPS systems. In LiFePO4 terms it is 120 cells in series (120 x 3.2V nominal = 384V), which lets the pack replace a VRLA string of the same nominal voltage without modifying the UPS.
Which cells are used in the 384V 200Ah string?
The string is built with Grade-A LiFePO4 cells from Tier-1 suppliers (CATL, BYD, EVE). Grade-A prismatic cells give consistent internal resistance and cycle behaviour, which matters most when five units run in parallel at a single site.
Can a LiFePO4 string replace VRLA without changing the UPS?
Usually yes, provided three things match: the nominal voltage band, the charge profile the UPS expects, and the communication protocol. We configure the BMS to the host's protocol so the UPS recognises the pack and can report SOC and alarms.
How does the system handle 45-50°C Gulf ambient?
VRLA life drops sharply above its 25°C design point — roughly halved for every 8-10°C rise. The LiFePO4 pack uses high-temperature-tolerant cells with a BMS that derates charge current as cell temperature climbs and forces active ventilation, so the pack tolerates sustained Gulf heat instead of ageing out of it.