Built Exclusively on Vertiv™
From the first rack to the whole room.
Uptime specifies Critical Power & Cooling entirely on Vertiv™ equipment — the same UPS, power distribution and precision cooling platforms running the world’s data centers, sized down to the network closet and up to the facility. One vendor, one parts list, one call for service.
1kVA to 1.2MW of UPS
Rack to facility-scale cooling
Factory-trained Vertiv service network
or call (800) 222-1440
3 tiers
of Vertiv™ UPS — network, facility, and large-scale
4 tiers
of precision cooling — rack, row, room, and facility
Single source
one Vertiv™ parts list, one service call
24/7/365
factory-trained field service and remote monitoring
Why one vendor
Vertiv™ is our only partner in this category — on purpose.
A rack UPS, a facility UPS, and the cooling above them all need to speak the same protocol and fail over the same way. We standardized Critical Power & Cooling on one manufacturer so the pieces are designed to work together, the spare parts interchange across your fleet, and there’s a single number to call when something needs attention — ours, and Vertiv™’s factory support behind it.
- Liebert® UPS, PDU, and static transfer switches — one electrical platform
- CoolPhase™ precision cooling, sized from a single closet to a full building
- Factory warranty and a nationwide Vertiv™ field service network
Start with the UPS
The most-requested piece first, then everything it needs.
Nine in ten quotes in this category start with a UPS question, so that’s where we start too. Vertiv™’s Liebert® line covers the same three tiers whether you’re protecting a single network rack or an entire facility — we size the unit to your load, not the other way around.
1–3 kVA
Network & Edge Tier
Vertiv™ Liebert® GXT5
Lithium-ion double-conversion UPS for a single rack, network closet, or edge site. 1–3kVA models available in tower or rack-mount, online double-conversion topology.
10–600 kW
Facility Tier
Vertiv™ Liebert® APM2 UL
Modular, scalable three-phase UPS for server rooms and mid-size facilities. Hot-swappable power modules let you add capacity as the load grows, without a forklift upgrade.
250–1,200 kW
Large-Scale Tier
Vertiv™ Liebert® EXL S1
Transformer-based three-phase UPS built for data center and large-facility scale, engineered for the highest levels of efficiency and availability at continuous high load.
Network & Edge Tier — Vertiv™ Liebert® GXT5
Rack-level protection that doesn’t take up rack space you need.
The Liebert® GXT5 is a lithium-ion, online double-conversion UPS built for the network closet, the edge site, or the single rack that can’t go down — a control room switch stack, a security head-end, a local server. Lithium-ion cells run cooler, last longer, and take up meaningfully less footprint than the legacy VRLA unit they replace, and the unit reports state of health back to your monitoring platform so a battery replacement is scheduled, not discovered.
Capacity
1,000–3,000 VA
Best fit
Network racks, edge sites, single-rack protection
Facility Tier — Vertiv™ Liebert® APM2 UL
Add capacity as the room grows — not before you need it.
The Liebert® APM2 is a modular, three-phase UPS for the server room or mid-size facility that expects to grow. Power modules are hot-swappable, front-accessible, and add in place, so a facility can start at the load it has today and scale toward 600 kW without re-specifying the room or taking a planned outage to do it.
Capacity
10–600 kW, modular
Best fit
Server rooms and mid-size facilities planning to grow
Large-Scale Tier — Vertiv™ Liebert® EXL S1
Where the whole facility rides on one bus.
The Liebert® EXL S1 is a transformer-based, three-phase UPS built for data center and large-campus scale — the tier where a single unit protects the whole building, not one room in it. It’s engineered for sustained high-load efficiency and for the redundant, parallel configurations that large facilities specify as standard.
Capacity
250–1,200 kW
Best fit
Data centers and campus-scale facilities
Between the UPS and the load
Getting protected power where it needs to go — and keeping it there.
A UPS is only half the answer. Vertiv™’s distribution and continuity gear moves that protected power from the battery room to the floor, and keeps it flowing if a utility feed or a UPS itself needs to come off line.
Vertiv™ Liebert® TFX
Floor-mount power distribution
Takes UPS output and breaks it down to panelboard-level circuits for the floor, with built-in metering and remote monitoring of every branch circuit.
Vertiv™ Liebert® STS2
Static transfer switch
Switches a critical load between two independent power sources in a quarter cycle — fast enough that connected equipment never sees the transfer — for dual-corded loads that can’t tolerate a gap.
Beyond backup — Vertiv™ EnergyCore™ BESS
Battery energy storage, for facilities that want their standby power working when the grid isn’t down.
A grid-scale battery system that pairs with your UPS to shave peak demand charges, participate in utility demand-response programs, or simply add a deeper reserve behind the generator. It’s a conversation worth having for any facility already sizing a large UPS — ask your Uptime rep whether it pencils out for your rate structure.
Cooling that scales with the room
Four tiers, one CoolPhase™ platform.
Heat is a byproduct of every watt the UPS protects, and it has to go somewhere. Vertiv™’s CoolPhase™ and SwitchAir™ lines cover the same four tiers as the UPS lineup — a single rack, a row, a room, and the whole facility — so cooling capacity grows in step with power capacity instead of getting re-specified at every stage.
Per rack
Rack Tier
Vertiv™ SwitchAir™
Mounts to the rear of the rack and pulls cold-aisle air across network switches and routers that sit above the airflow a server draws.
30–40 kW
Row Tier
Vertiv™ CoolPhase™ Row
In-row precision cooling that sits between server racks, so cold air travels inches instead of across the room.
11 kW
Room Tier
Vertiv™ CoolPhase™ Wall
Wall-mounted precision cooling for a server room or small computer room, no raised floor or ductwork required.
150–600+ kW
Facility Tier
Vertiv™ CoolPhase™ Flex
Hybrid outdoor packaged system that pairs air and liquid cooling for a full facility, deployed as a rooftop or pad-mounted unit.
Row Tier — Vertiv™ CoolPhase™ Row
Cold air that travels inches, not across the room.
CoolPhase™ Row units sit in the rack row itself, drawing hot exhaust from the aisle behind and returning conditioned air directly in front of the racks that need it. Because the cooling source sits where the heat is generated, a room can run at meaningfully higher rack density than perimeter cooling alone supports, without hot spots forming between units.
Capacity
30–40 kW per unit
Best fit
Dense rack rows, colocation, high-density computing
Room Tier — Vertiv™ CoolPhase™ Wall
Precision cooling for the room that doesn’t have a raised floor.
Most server rooms outside a purpose-built data center don’t have a raised floor or central plant to tie into — they have a wall. CoolPhase™ Wall units mount directly to it, giving a converted office, a school’s network closet, or a hospital’s IT room dedicated precision cooling with humidity control, without ductwork or construction.
Capacity
11 kW
Best fit
Converted rooms, no raised floor or central plant
Side by side
Three UPS tiers, compared.
| Spec | Liebert® GXT5 | Liebert® APM2 UL | Liebert® EXL S1 |
|---|---|---|---|
| Capacity | 1–3 kVA | 10–600 kW | 250–1,200 kW |
| Topology | Online double-conversion | Online double-conversion, modular | Online double-conversion, transformer-based |
| Battery | Lithium-ion | VRLA or lithium-ion | VRLA or lithium-ion |
| Form factor | Tower or 1–2U rack-mount | Modular frame, hot-swap power modules | Free-standing cabinet(s) |
| Typical fit | Network closet, edge, single rack | Server room, mid-size facility | Data center, campus-scale facility |
| Scales by | Adding units | Adding power modules in place | Paralleling additional frames |
Exact model numbers, redundancy configuration (N, N+1, 2N) and runtime are confirmed at quote against your named load and battery string. All three tiers are backed by Vertiv™ factory warranty and serviced by the Vertiv™ field network.
Backed by the manufacturer, not just the reseller
Vertiv™ runs the world’s data centers. We put that behind your facility.
Vertiv™ is one of the largest critical-infrastructure manufacturers in the world, with a global service organization built around keeping this exact equipment running. When Uptime specifies Critical Power & Cooling, your facility gets Vertiv™’s factory warranty, parts availability, and 24/7 field service — coordinated through a single point of contact on our side.
Global
manufacturer field service network
Factory
warranty on every unit we specify
One call
Uptime coordinates service, parts, and warranty
24/7
remote monitoring available on every tier
Common questions
Critical Power & Cooling FAQs.
Why only Vertiv™ in this category?
The UPS, distribution and cooling all have to interoperate and fail over together, and one manufacturer’s parts and monitoring platform do that more reliably than a mixed fleet. Vertiv™ is also the only partner we carry in Data Center Infrastructure, so a facility standardizing on both categories stays on one vendor end to end.
How do I know which UPS tier I need?
Start with what you’re protecting: a single rack or network closet points to the GXT5 tier, a server room or growing facility points to APM2, and a data center or campus load points to EXL S1. Send us your load and we’ll size it — most quotes in this category start with exactly that question.
Do I need a static transfer switch if I already have redundant UPS?
If any load in the room is single-corded — one power input, not two — an STS2 lets it draw from two independent UPS sources without you rewiring the device. Dual-corded equipment can usually skip it.
Does the cooling tier have to match the UPS tier?
Not exactly — cooling is sized to heat load, not UPS capacity. A dense rack row on a mid-size UPS can still need row-level cooling. We size airflow separately, then check it against your power plan.
Is battery energy storage (BESS) right for every facility?
It depends on your utility rate structure and demand charges. It’s worth evaluating any time you’re already sizing a large UPS, since the battery infrastructure overlaps — but it’s an add-on, not a requirement.
What does Data Center Infrastructure cover that this category doesn’t?
Critical Power & Cooling covers the power path and thermal management. Racks, enclosures, modular data center builds and monitoring software live in Data Center Infrastructure — see that category for the physical layer.
Tell us your load. We’ll size the tier.
A voltage, a kVA or kW figure, and a sense of the room is enough to start — we’ll come back with a Vertiv™ configuration sized to your facility, not a catalog default.