Vertiv 4803E-24-B 1600kVA Three-Phase Double Conversion UPS

Overview

The Vertiv 4803E-24-B is a 1600kVA / 1600kW three-phase uninterruptible power supply built on the Trinergy UPS platform, designed for large-scale critical power applications where efficiency and load unity matter as much as uptime. Rated at 480V three-phase input (432–552V tolerance) and 480V output (408–552V range), the 4803E-24-B targets data centers, large commercial facilities, and industrial environments that cannot afford brownout-related equipment damage or generator instability during transition events.

This is a skid-mount and containerized-capable solution with top/bottom cable access and front-plus-top service access — form factors that matter when you are commissioning into an existing electrical room with overhead cable trays or planning a modular containerized deployment. The unit ships UL-listed and operates across 0–50°C with automatic derating beginning at 40°C, covering most conditioned equipment room environments.

Key Features

• 1600kVA / 1600kW at Unity Power Factor: The Trinergy platform delivers output power factor up to 1.0, meaning every kVA of UPS capacity translates directly into usable kW. On conventional 0.9 PF UPS designs, a 1600kVA unit caps at 1440kW of real load. Here, you get the full 1600kW — a meaningful difference when sizing for high-density server or power distribution loads.
• ≥97% Double Conversion Efficiency (VFI): Double conversion (Voltage and Frequency Independent) mode keeps output fully conditioned and isolated from input disturbances at all times. At 97% efficiency on a 1600kW load, losses run under 50kW — substantially lower than typical large UPS thermal output, which directly reduces HVAC burden and operating cost over the system lifecycle.
• ≥99% Dynamic Online Mode: When load conditions and input quality allow, Dynamic Online mode lifts efficiency to 99% or better while retaining fast transfer-to-battery capability. For facilities running stable utility feeds with occasional disturbances, this mode reduces energy costs without sacrificing protection — relevant across a 365-day continuous operation cycle.
• Full IGBT Three-Level NPC2 Topology: The NPC2 (Neutral Point Clamped) three-level IGBT topology generates lower output harmonic distortion than conventional two-level designs. In practice, this means cleaner output waveform for sensitive loads — server power supplies, precision measurement equipment, and medical-grade devices that can reject two-level switching artifacts.
• 480V Three-Phase Input with Wide Tolerance Range (432–552V): The 20% input voltage window (±10% around nominal) absorbs grid sag and swell events without switching to battery unnecessarily. In facilities with generator-sourced feeds or unstable utility infrastructure, this tolerance prevents nuisance battery discharge cycles that shorten battery service life.
• 480V Three-Phase Output (408–552V Range): Output regulation holds across a wide band, protecting downstream distribution panels and PDUs from voltage excursions without requiring additional voltage conditioning equipment between the UPS and the load.
• Top and Bottom Cable Access: Dual cable entry points let the installation team route feeders and load cables to match the existing conduit infrastructure — top entry for overhead runs, bottom for under-raised-floor or slab-penetration layouts. This is a concrete time saver during commissioning in brownfield electrical rooms.
• Front and Top Service Access: All service touchpoints are reachable from front or top, which simplifies maintenance access in tight equipment rooms where side clearance may be constrained. This matters for scheduled preventive maintenance intervals over the UPS service life.
• Vertiv Touchscreen Control Panel: The standard Vertiv touchscreen interface provides status monitoring, alarm history, and configuration access without requiring an external management terminal for routine operations. Integration with SNMP-based building management or data center infrastructure management (DCIM) systems should be confirmed against the specific firmware and interface card configuration for this unit.
• Skid-Mount and Containerized Deployment Ready: The 4803E-24-B is designed for skid-based roll-in commissioning and supports containerized power plant configurations — useful for edge data center builds, modular deployments, or temporary critical power installations where speed of deployment is a constraint.
• Operating Range 0–50°C with Auto-Derating Above 40°C: The 50°C upper limit covers hot-aisle environments and non-air-conditioned equipment buildings, though output capacity automatically derates above 40°C. Plan thermal capacity accordingly if ambient regularly exceeds 40°C — full 1600kW output requires ambient at or below that threshold.
• UL Listed: UL certification confirms the unit has been independently tested to applicable North American safety standards, which is typically a prerequisite for AHJ (Authority Having Jurisdiction) approval in commercial and industrial electrical permit processes.

Integration and Compatibility

The 4803E-24-B operates on three-wire electrical systems with three-phase plus protective earth (3Ph+PE) wiring — standard for North American large commercial and industrial electrical infrastructure at 480V. Confirm upstream transformer secondary configuration and protective earth bonding scheme with the installation engineer before commissioning. The wide input voltage tolerance (432–552V) accommodates delta and wye secondaries within the tolerance window, but step-down or isolation transformer requirements should be validated per site.

For facilities integrating this unit into a critical power infrastructure or broader Vertiv power solutions deployment, the touchscreen control panel provides local management, and DCIM integration paths are available through Vertiv's interface card ecosystem — verify card compatibility and firmware version with your systems integrator before specifying monitoring architecture. Facilities deploying multiple units should review the Vertiv power distribution portfolio for compatible switchgear and PDU pairings.

This unit is appropriate for large-scale UPS systems deployments in data centers, healthcare facilities, industrial manufacturing environments, and other critical infrastructure where load continuity and power quality are non-negotiable. Review UPS selection and sizing guidance if comparing topology options or sizing this unit against redundant configurations.

Frequently Asked Questions

Q: What is the rated power output of the Vertiv 4803E-24-B?

A: The 4803E-24-B is rated at 1600kVA and 1600kW. Because the Trinergy platform supports output power factor up to 1.0, the full kVA rating converts directly to usable kW — unlike conventional UPS designs where a 0.9 PF derate reduces available real power.

Q: What efficiency levels does the 4803E-24-B achieve?

A: In Double Conversion (VFI) mode, efficiency is rated at ≥97%. In Dynamic Online mode, efficiency reaches ≥99%. The higher efficiency mode is available when input conditions are stable, automatically reverting to full double conversion if power quality degrades.

Q: What is the input voltage range for the 4803E-24-B?

A: The unit accepts 480V three-phase input with a tolerance range of 432 to 552V (3Ph+PE). This ±10% window accommodates grid sag, swell, and generator output variation without triggering unnecessary battery transfer events.

Q: Does the 4803E-24-B support skid-mount or containerized installation?

A: Yes. The design explicitly supports skid-mount and containerized deployment, allowing for roll-in commissioning and integration into modular or containerized power plant configurations — useful for edge data center or rapid-deployment critical power projects.

Q: What are the operating temperature limits for the 4803E-24-B?

A: The operating range is 0 to 50°C. Automatic output derating begins at 40°C, so environments regularly exceeding 40°C ambient should account for reduced available capacity when sizing the unit against the intended load.

Q: What certifications does the 4803E-24-B carry?

A: The 4803E-24-B is UL listed, confirming compliance with applicable North American safety standards. This is typically required for AHJ electrical permit approval in commercial and industrial installations.

Ted Perry

The 4803E-24-B is one of the few large-format UPS platforms I'd recommend specifically for deployments where the unity power factor output is the deciding constraint. At 1600kVA with a 1.0 PF rating, you're getting 1600kW of usable real power — and on high-density data center rows or industrial motor load circuits, that gap between kVA and kW on a conventional 0.9 PF unit adds up to 160kW of capacity you're leaving on the table per unit installed. When you're spec'ing multiple units for a large facility, that's a meaningful sizing and cost difference.

Technical Highlights:

• NPC2 Three-Level IGBT Topology: The three-level NPC2 design produces significantly lower output harmonic content than two-level IGBT converters — relevant when sensitive server PSUs or instrumentation loads share the same distribution bus and cannot tolerate waveform distortion.
• Dual Efficiency Modes: The ≥97% VFI mode handles full conditioning at all times; the ≥99% Dynamic Online mode cuts losses further when input is clean. On a 1600kW continuous load, the 2-point efficiency difference is roughly 32kW — enough to matter on an annual energy cost calculation for a large facility.
• Wide Input Tolerance (432–552V): The 120V input window means generator handoffs and utility browndown events that sit within ±10% of nominal 480V don't force a battery transfer. That directly extends battery service life in facilities with frequent generator exercise cycles or unreliable utility feeds.

Deployment Considerations:

• Confirm 3Ph+PE upstream wiring configuration before commissioning — the unit is designed for three-wire plus protective earth, and site electrical verification should precede installation to avoid bonding conflicts with existing neutral and ground architecture.
• Output derating above 40°C ambient is automatic and not operator-selectable — in non-air-conditioned or hot-aisle environments that regularly approach 45–50°C, your effective usable capacity will be reduced. Factor this into load calculations during the design phase, not after the unit is installed.

The 4803E-24-B (often searched as 4803E 24 B) is the right specification for large data center builds, healthcare campus central plants, and industrial facilities running continuous 480V three-phase loads where efficiency above 97% and unity power factor output are both hard requirements — not just nice-to-haves on the spec sheet.