Li90 20kVA — compact three-phase lithium UPS with up to 22 minutes internal runtime
The Li90 20kVA delivers full 20kW three-phase power with integrated LiFePO₄ batteries and up to 22 minutes of internal runtime in a 12.6″ slim cabinet — no external battery cabinets required. Designed for facility electrical rooms, telecom infrastructure, and industrial control environments requiring higher-capacity lithium UPS protection in space-constrained locations.
15 or 22 minutes internal runtime — no external cabinets
The Li90 20kVA supports 2 or 3 internal LiFePO₄ battery modules. A minimum of 2 modules is required at 20kW capacity; adding a third extends runtime from 15 to 22 minutes at full load. This internal-runtime capability is uncommon in compact 20kVA UPS systems — competing platforms typically require external battery cabinets to achieve equivalent backup duration.
Each LiFePO₄ module is 50 Ah / 57.6 V / 2,880 Wh · 80 lbs · hot-swappable without powering down the load.
Li90 20kVA platform features
Online double-conversion — zero transfer time
The connected load never operates on raw utility power. No transfer delay during power events. Output is clean, regulated, and isolated from upstream disturbances at all times.
50°C operation — telecom and industrial environments
Reliable operation to 50°C (122°F) without derating until 40°C. Suitable for facility electrical rooms, telecom infrastructure, and industrial spaces where VRLA UPS systems require supplemental cooling.
Hot-swappable LiFePO₄ modules — no downtime
Modules are replaced without tools and without powering down the load. Up to 15-year service life in ideal conditions — eliminating the recurring replacement cycles of VRLA battery systems.
4.3″ touchscreen · SNMP · dry contacts
Color touchscreen with single-line mimic, event logging, and access control. Two slots for SNMP/Web management cards. Programmable dry contacts (1 in / 5 out) for facility integration and BMS connectivity.
Maintenance bypass — no external switchgear
Integrated maintenance bypass allows safe servicing without powering down the load. No external bypass cabinet or switchgear required — simplifying installation in constrained electrical rooms.
110% overload for 60 min · 150% for 1 min
High overload capacity handles inrush and startup surges from motors, compressors, and inductive facility loads without nuisance tripping or transfer to bypass.
Li90 20kVA vs. typical 20kVA VRLA UPS systems
| Feature | Li90 20kVA | Typical 20kVA VRLA UPS |
|---|---|---|
| Internal runtime | Up to 22 min | 5–10 min |
| External cabinets required | No | Yes for >10–15 min |
| Battery technology | LiFePO₄ lithium | VRLA lead acid |
| Battery service life | Up to 15 years | 3–5 years |
| Operating temperature | 50°C | 25–30°C |
| Cabinet footprint | 12.6″ · compact single cabinet | Large with external battery frames |
| Installation complexity | Low | Higher |
| Battery service | Hot-swap · no downtime | Downtime planning required |
See head-to-head comparisons against Eaton, Vertiv, and APC on the Li90 comparison hub →
Li90 20kVA specifications
| Rated power | 20 kVA / 20 kW |
| Topology | Online double-conversion |
| Input voltage | 208/120V · 3-phase |
| Output voltage | 208/120V · 3-phase |
| Battery chemistry | LiFePO₄ (lithium iron phosphate) |
| Battery module capacity | 50 Ah / 57.6 V / 2,880 Wh · 80 lbs each |
| Battery modules | 2–3 (minimum 2 required, hot-swappable) |
| Internal runtime | 15 min (2 modules) · 22 min (3 modules) at 20kW |
| Battery service life | Up to 15 years ideal conditions · 3,000–5,000 cycles |
| Operating temperature | Up to 50°C (122°F) · no derating to 40°C |
| Cabinet width | 12.6″ |
| Battery location | Internal — no external cabinets required |
| Overload | 110% for 60 min · 150% for 1 min |
| Display | 4.3″ color touchscreen · single-line mimic · event log |
| Communication | 2 slots — optional SNMP/Web · dry contacts (1 in / 5 out) |
| Approvals | UL 1778 · UN 38.3 · UL 1973 · not currently cUL |
| Warranty | 2-year on-site UPS · 5-year battery (USA · up to 40°C) |
Li90 20kVA deployment environments
Li90 three-phase lithium UPS — all capacities
Documentation
Configure the Li90 20kVA for your site
Module configuration, runtime sizing, site evaluation, and installation planning for the Li90 20kVA. Our specialists will match module count and runtime to your load and environment.