
A medium-voltage UPS designed for grid-safe data centers
ON's patented AI UPS™ is the only medium-voltage UPS proven at scale, with 3 GW currently deploying across multiple hyperscale data center campuses. Validated at our 9-MW testbed at the National Laboratory of the Rockies, AI UPS exceeds NOGRR 282 and other emerging voltage ride-through requirements in MISO and PJM.
General
- Rated power
- 3.5 MW
- BOL Duration[A]
- 0.9 h
- Double conversion efficiency
- 95% at typical loading point
- Auxiliary power
- <65 kVA
- Auxiliary configuration
- 480 V, 4W, 3Ph + N
- Communication
- Modbus TCP/IP
- Compliance
- UL 9540 compatible, UL 9540A, UL 1973, UN 38.3, UL 1741, C22.2 No. 107.1-16, IEEE 1547, NFPA 8055 2026, IEC 62040-3 Class 1 (UPS Power Quality Requirements)
- Architecture
- Medium Voltage Series-Connected Double Conversion
Physical
- Enclosure Specification
- NEMA 3R
- Ambient temperature (operation)[B]
- -40°C to +50°C
- Ambient temperature (storage)
- -40°C to +60°C
- Relative humidity
- 0 to 95% (non-condensing)
- Corrosion rating[C]
- ISO 12944 C3 (C4 optional)
- Operating altitude[D]
- Up to 2000 m
- Cooling
- PCS: Forced air Battery: Liquid-cooled Transformers: Non-Mineral Oil - Air Natural (KNAN)
Input
- Input voltage
- Up to 34.5kV
- Voltage tolerance
- ± 10%
- Frequency
- 50 / 60 Hz (configurable)
- Power factor
- Operating: 1 grid support (Q power): upon request
- Battery charging during full power double conversion
- Up to 13% of rated power
Output
- Output voltage
- Up to 34.5 kV (3Ph 4W)
- Steady state voltage
- Per ITIC & IEC 62040-3
- variation
- ± 0.5%
- Frequency accuracy
- ± 0.5%
- Power factor
- 0.95 lag.
- Maximum fault current contribution
- 125 % of rated current
- THDv
- <1%
Battery System
- Technology
- Li-ion (LFP)
- Catalog capacity
- 3.79 MWh DC
- DC voltage range
- 1250 - 1500 VDC
- Charging/discharging rate
- 1 C
Grid Code ComplianceMinimum Voltage Ride-Through Duration
Footnotes
- [A]0.9hr Beginning of Life (BOL). Times will vary based on load profile and grid code required ramp rate.
- [B]De-rates above 45°C, consult ON.energy.
- [C]All control (sensitive electronics) enclosures are NEMA 4, power enclosures are NEMA 3R.
- [D]De-rates above 2000 m, consult ON.energy.
All parameters to be confirmed during final contracting.
Contact: sales@on.energy
NOTICE: This document contains information, including design and specification details, regarding the patented and patent pending AI UPS product. It is intended only for evaluation purposes. Unauthorized use is prohibited.



