Large-Scale Tier — Vertiv™ Liebert® EXL S1
Liebert® EXL S1
A transformer-based, three-wire UPS built for data center and campus scale — the tier where one unit protects the whole building.
250–1,200 kW
Up to 99% Dynamic Online efficiency
Dynamic Grid Support
or call (800) 222-1440
What’s Built In
Where the whole facility rides on one bus.
- Transformer-based, three-wire topology engineered for sustained high-load efficiency
- Safe Capacity Mode tests UPS load and battery discharge without an external load bank
- Touchscreen control panel and Vertiv™ LIFE™ Services 24×7 remote monitoring
- Dynamic Grid Support: 0.5-second response to grid service commands via battery charge/discharge
- Top and front access to key components — no need to enter bypass or shut down power to service
Optimized for maximum efficiency and power density, with a smaller footprint than comparable UPS in its class — space that can go back to revenue-generating IT equipment. At Dynamic Online mode, the UPS can reach up to 99% operating efficiency without sacrificing availability.
Model range
Four capacity tiers, 480V, 3-wire throughout.
250–400 kW
79.1″ H × 51.3″ W × 36.0″ D · 1,970 lbs
500–600 kW
79.1″ H × 63.0″ W × 36.0″ D · 2,750 lbs
625–800 kW
79.1″ H × 78.8″ W × 36.0″ D · 3,508 lbs
1,000–1,200 kW
79.1″ H × 104.5″ W × 36.0″ D · 4,667 lbs
Full Specifications
Every number, for the people who ask for them.
| Capacity | 250–1,200 kW |
| Topology | Online double-conversion, transformer-based, 3-wire |
| Efficiency | Up to 97% double conversion, up to 99% Dynamic Online mode |
| Input / Output Voltage | 480 volts |
| Height | 79.1 in, all tiers |
| Width | 51.3–104.5 in, by capacity tier |
| Depth | 36.0 in |
| Weight | 1,970–4,667 lbs, by capacity tier |
| Warranty | One-year limited, defects in material and workmanship |
| Best fit | Data centers and campus-scale facilities |
Exact model, redundancy configuration, and runtime are confirmed at quote against your named load and battery string. Backed by Vertiv™ factory warranty and the Vertiv™ field service network.
Ready to spec the EXL S1?
A voltage and a kW figure is enough to start — we’ll come back with a configuration sized to your facility.