J90 Lithium UPS – 1U High-Density Online Rack UPS (1000–3000VA, 120V)
1000–3000 VA | 120V | 1U Online Double-Conversion UPS
High-density lithium rack UPS engineered for distributed IT, AV, telecommunications, and industrial infrastructure requiring conditioned power, compact deployment, and operational control at the rack level.
The J90 Series is a 1U online double-conversion UPS designed for rack environments where space efficiency, thermal performance, and operational control are critical.
By integrating LiFePO₄ batteries within a compact 1U architecture, J90 delivers long service life, high-temperature operation, and reduced maintenance while enabling localized power continuity directly at the equipment rack.
J90 is commonly evaluated as a direct alternative to the APC Smart-UPS Ultra platform for 1U lithium rack UPS deployments.
Key Specifications
- 1000 / 1500 / 2000 / 3000 VA
- 120V single phase
- Online double-conversion topology
- Lithium Iron Phosphate (LiFePO₄)
- 1U rackmount form factor
- Up to 50 °C operation
- Remote-switchable outlets
- 6-year warranty (U.S. & Canada)
Datasheet:
https://xpcc.com/wp-content/uploads/J90-Flyer.pdf
High-Density Rack-Level Power Architecture
J90 is designed for environments where power protection must be deployed directly at the rack level rather than centralized.
Online double-conversion topology ensures continuous conditioned power, isolating connected equipment from upstream disturbances.
Lithium battery architecture supports high-density deployment by reducing maintenance requirements and improving performance in elevated temperature environments.
Where J90 Fits
J90 operates as the high-density lithium UPS platform within distributed rack infrastructure.
It is typically deployed:
- in network closets and IT racks
- in telecommunications and edge environments
- in AV, security, and industrial systems
Within the Xtreme Power architecture:
- J60C → short-depth lithium UPS
- P91 Li → standard lithium UPS
- J90 → high-density lithium UPS (this platform)
- Li90 → facility-level lithium UPS
J90 vs Conventional Rack UPS Platforms
Conventional rack UPS systems typically require 2U or greater rack space and rely on VRLA batteries with shorter service life and higher maintenance requirements.
J90 provides equivalent or greater protection in a 1U form factor while enabling higher energy density and longer lifecycle performance.
Integrated outlet-level switching further eliminates the need for external switching hardware in many deployments.
J90 vs Other Lithium Rack UPS Platforms
| Feature | J90 | P91 Li | APC SMTL Series | Eaton 9PX Lithium |
| Form Factor | 1U | 2U | 2U / 3U (model dependent) | 2U |
| Topology | Online (double-conversion) | Online (double-conversion) | Line-interactive | Online (double-conversion) |
| Battery | LiFePO₄ | LiFePO₄ | Lithium-ion | Lithium-ion / LFP |
| Runtime | Internal + external (2–3kVA) | Internal | Internal only | Internal + external |
| Individual Outlet Control | Yes (per outlet) | No | No | No |
| Temperature Rating | Up to 50°C | Up to 50°C | 40°C typical | 40°C typical |
| Deployment | Rack (1U) | Rack / tower / wall | Rack / tower | Rack / tower |
| Positioning | High-density / premium | Standard lithium UPS | Legacy lithium | Enterprise lithium |
View detailed model comparisons →
https://xpcc.com/j90-ups-comparisons/
Remote Power Control and Operational Resilience
J90 integrates remote-switchable outlets, enabling direct control of connected equipment without additional hardware.
This supports remote reboot, load sequencing, and recovery workflows across distributed environments.
When combined with intelligent PDUs such as the Xtreme Power SPDU platform (https://xpcc.com/products/spdu/), J90 enables coordinated rack-level power control and improved operational resilience.
Runtime Architecture and Deployment Flexibility
J90 provides internal runtime for localized continuity and supports extended runtime through external lithium battery packs on 2000VA and 3000VA models.
This allows runtime to be aligned with application requirements while maintaining a compact 1U deployment.
Extended runtime guide:
https://xpcc.com/wp-content/uploads/J90-Extended-Runtimes.pdf
Lithium UPS Lifecycle Advantages
Lithium UPS systems provide lifecycle advantages compared to VRLA systems, including longer service life, improved thermal performance, and reduced maintenance.
LiFePO₄ battery systems are designed for long lifecycle performance, with up to 15-year battery life under ideal operating conditions.
Learn more:
https://xpcc.com/lithium-ups-guide/
Replace APC / Eaton 120V Rack UPS
J90 is commonly deployed as a replacement for conventional rack UPS platforms including:
- APC Smart-UPS SMT and SRT series
- Eaton 9PX lithium and VRLA models
- Vertiv Liebert GXT5 systems
It provides higher power density, integrated control, longer lifecycle, and improved thermal performance.
Explore comparisons:
https://xpcc.com/j90-ups-comparisons/
Typical Applications
J90 is deployed across distributed infrastructure environments including:
- network closets and IT infrastructure such as IDF/MDF environments (https://xpcc.com/ups-for-idf-mdf-closets/)
- telecommunications and edge infrastructure
- AV and security systems
- industrial and regulated environments
Capacity Guidance
Capacity selection is based on rack load:
- 1000 VA → edge and embedded systems
- 1500 VA → AV and control systems
- 2000 VA → telecom and IT racks
- 3000 VA → commercial and industrial infrastructure
Runtime should be aligned with continuity objectives and redundancy strategy.
UPS sizing tool:
https://xpcc.com/selector
Technical Summary
- Topology: Online double conversion
- Capacity: 1000–3000 VA
- Voltage: 120V
- Battery: LiFePO₄
- Form Factor: 1U rack / wall-mount
- Runtime: Internal + optional external
- Monitoring: Optional SNMP
- Outlet Control: Individual switching
Plan With Confidence
Xtreme Power Conversion supports infrastructure planners, consultants, and system integrators with lithium rack UPS standardization, distributed power architecture design, and lifecycle modernization planning.
(800) 582-4524
sales@xpcc.com
| MODEL NUMBER | J90-1KLiD | J90-1.5KLiD | |
| CAPACITY | Power rating | 1000VA (900W) | 1500VA (1350W) |
| INPUT | Voltage/frequency | 120/110Vac, 40-70Hz | |
| Power factor | ≥0.99 @ Nominal voltage (full load) | ||
| OUTPUT | Voltage | 110/120VAC | |
| Waveform | Pure sine wave: <=3% THD (linear load), <=5% THD (non-linear load) | ||
| Frequency | 50/60Hz ± 0.5% | ||
| Overload capacity | ≤130% for 2 min; 130% < Load < 200% for 10 sec; >200% for 250ms | ||
| BATTERY | Battery type | Lithium-ion battery | |
| Battery quantity & size | (1) 25.6V /6Ah | (1) 38.4V/ 6Ah | |
| Typical recharge | 4 hours to 90% | ||
| PHYSICAL | Dimensions (W x D x H) | 17.2 x 18.8 x 1.7 in (438 x 477 x 44 mm) | 17.2 x 20 x 1.7 in (438 x 510 x 44 mm) |
| Weight | 26.8 lbs (12.2 kg) | 27.7 lbs (12.6 kg) | |
| Line cord | C14 inlet, 5ft 5-15P to C13 line cord | 6ft 5-15P | |
| Receptacles | (4) 5–15R, all are switchable | ||
| ENVIRONMENT | Operating temperature | 32–122°F (0–50°C) | |
| Altitude | 6500 ft (2000 m) above sea level* | ||
| APPROVALS | UN38.3 , UL, cUL, RoHS, FCC A | ||
| WARRANTY | 6 years electronics, 6 years battery warranty (USA and Canada)** | ||
| COMMUNICATIONS INTERFACE | Intelligent slot for optional cards (Web/SNMP, Relay/dry contact, Modbus) | ||
| INCLUDED IN BOX | ViewPower software, horizontal brackets, user manual | ||
| AVAILABLE OPTIONS | Bypass distribution (XBDM), power distribution (XPDU), 4-post rail kit, 2-post shelf kit | ||
