Vertiv Liebert EXL S1: 250 to 1200 kVA UPS
Liebert EXL S1 is Vertiv’s large-capacity three-phase UPS, covering 250 to 1200 kVA and rated up to 1250 kW. It is the family we quote when the room is a data hall rather than a server room, and when the power train is being designed rather than retrofitted. Lithium-ion battery support is part of the platform.
Technical specification
| Model code | Power | Input / output voltage | Phases | Topology | Efficiency | Dimensions W×D×H (mm) | Weight | Parallel / redundancy | Battery type |
|---|---|---|---|---|---|---|---|---|---|
| EXL S1 250 kVA | 250 kVA / 250 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 1303 × 914 × 2009 | 848 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 300 kVA | 300 kVA / 300 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 1303 × 914 × 2009 | 848 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 400 kVA | 400 kVA / 400 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 1303 × 914 × 2009 | 848 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 500 kVA | 500 kVA / 500 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 1600 × 914 × 2009 | 1247 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 600 kVA | 600 kVA / 600 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 1600 × 914 × 2009 | 1247 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 625 kVA | 625 kVA / 625 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 2002 × 914 × 2009 | 1591 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 750 kVA | 750 kVA / 750 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 2002 × 914 × 2009 | 1591 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 800 kVA | 800 kVA / 800 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 2002 × 914 × 2009 | 1591 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 1000 kVA | 1000 kVA / 1000 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 2654 × 914 × 2009 | 2117 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 1100 kVA | 1100 kVA / 1100 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 2654 × 914 × 2009 | 2117 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
| EXL S1 1200 kVA | 1200 kVA / 1200 kW | 480 V AC, 3 telli (giris ve cikis) | Three-phase, 3-wire | On-line double conversion; distributed static bypass in each module | Up to 97% double conversion; 96.8% at partial load with Intelligent Paralleling | 2654 × 914 × 2009 | 2117 kg | Up to 8 units in distributed parallel | Lithium-ion, VRLA, VLA |
Space, floor loading and service clearance
The EXL S1 grows sideways rather than upwards. Every rating in the table stands about 2009 mm tall and 914 mm deep, but the width runs from roughly 1303 mm at 250 kVA to about 2654 mm at 1200 kVA with the standard input and output cabinet. Weight moves with it, from around 848 kg to about 2117 kg unpackaged. Three things follow from that shape. The route into the room has to take the widest single section, not the assembled line up. The floor has to carry the load, and on a raised floor that means a plinth or a structural check rather than an assumption. And the aisle in front has to leave room to withdraw a module and to swing the door. If the cabinet is ordered with the backfeed protection or sharing inductor option the width increases again, so settle the option list before the layout drawing is issued rather than after it.
Source of the values: Vertiv Liebert EXL S1 250-1200 kW brosur + 500-600 kVA datasheet (SL-26002). Dimensions and weights are for the standard I/O cabinet, converted from the inches and pounds published by the manufacturer. An en dash means the manufacturer does not publish that value; we do not fill it in with an estimate. Confirm every figure against the current manufacturer document before it is written into a contract.
The references we quote in this family are EXL S1 250 kVA, EXL S1 300 kVA, EXL S1 400 kVA, EXL S1 500 kVA, EXL S1 600 kVA, EXL S1 625 kVA, EXL S1 750 kVA, EXL S1 800 kVA, EXL S1 1000 kVA, EXL S1 1100 kVA and EXL S1 1200 kVA. Send us the reference if you already have one, or the load in kW and the runtime if you do not, and we will confirm availability and lead time.
Which one should you choose?
This is a design-stage product
At 250 kVA and above the UPS is no longer something you drop into an existing room. Switchgear, cable routes, floor loading, battery room ventilation and the generator transfer arrangement all have to be settled together. If the building is already fixed, tell us its constraints first, because they narrow the product choice more than the load does.
Lithium-ion changes the room, not just the battery
Li-ion occupies roughly half the footprint of an equivalent VRLA string and lasts substantially longer, which matters most where floor space is expensive or the battery room is undersized. It costs more up front. The comparison that decides it is not price per kWh but total cost across the expected life of the installation.
Sizing and redundancy
Available ratings are 250, 300, 400, 500, 600, 625, 800, 1000 and 1200 kVA. At this scale the redundancy topology, whether N+1, 2N or a distributed-redundant arrangement, decides how many frames you buy and therefore most of the budget. Bring the topology to the first conversation, not the second.
Commissioning is part of the schedule
A UPS in this class is not energised the day it arrives. Site acceptance, battery forming and load-bank testing all take time and all need the room and the generator to be ready. Put commissioning in the project programme at the quote stage, not after delivery, because that is where large-power projects usually slip.
Maintenance bypass is not optional
At this capacity the installation needs a way to take the UPS out of circuit without dropping the load. Whether the bypass is internal or a separate panel changes the switchboard design and the room layout. Settle it in the single-line diagram, because adding it later means an outage.
Request a Quote
Tell us the load in kW, the runtime you want and the delivery country. A priced quote comes back within 48 hours, usually with a second option so the trade-off is visible.
