Li90 — Compact Three-Phase Lithium UPS with Internal LiFePO₄ Batteries
The Li90 replaces the traditional three-phase UPS plus external battery cabinet combination with a single slim tower. LiFePO₄ batteries are integrated inside the enclosure — no external cabinets, no floor space for battery frames. Available in 10kW, 20kW, and 30kW.
Li90 model lineup — 10kW, 20kW, 30kW
All three Li90 models share the same internal battery architecture, cabinet design, and operating specifications. The difference is capacity and the number of battery modules supported. If you’re between sizes, talk to an engineer before specifying — runtime requirements often drive the decision more than load size.
Distributed and small electrical rooms. Edge and telecom infrastructure where footprint is constrained. Supports 1–3 battery modules.
30 min at 10kW · 2 modules
45 min at 10kW · 3 modules
87 min at 5kW · 3 modules
Facility and mid-tier infrastructure. Industrial automation control rooms and distributed IT environments. Supports 2–3 battery modules.
22 min at 20kW · 3 modules
Central IT and core infrastructure. Highest capacity in the Li90 family — 3 battery modules required. Slimmest and lightest 30kVA UPS available at ~483 lbs.
18 min at 25kW · 3 modules
Internal batteries — no external cabinets required
Conventional three-phase UPS systems require separate external battery cabinets — enclosures that consume additional floor space, require additional electrical connections, and complicate installation. The Li90 integrates up to three LiFePO₄ battery modules inside the lower section of the UPS enclosure. The footprint is the UPS. That’s it.
Runtime by load and battery module configuration
Runtime scales with the number of battery modules installed. All three models accept up to 3 modules. The 10kW model can operate with 1 module; the 20kW requires a minimum of 2; the 30kW requires all 3.
| Battery modules | 5kW | 10kW | 15kW | 20kW | 25kW | 30kW |
|---|---|---|---|---|---|---|
| 1 module | 29 min | 15 min | — | — | — | — |
| 2 modules | 58 min | 30 min | 20 min | 15 min | — | — |
| 3 modules | 87 min | 45 min | 30 min | 22 min | 18 min | 15 min |
Runtimes in minutes at continuous load. Approximate — varies by battery age, temperature, and site conditions. Each battery module is 50AH / 57.6V / 2,880Wh · 80 lbs · hot-swappable.
Designed for demanding deployment environments
Rated for continuous operation to 50°C (122°F) without derating until 40°C. Deploy in telecom shelters, industrial rooms, and electrical spaces where VRLA systems require supplemental cooling or capacity reduction.
Modules are replaced without tools and without powering down the load. LiFePO₄ chemistry supports up to 15 years service life in ideal conditions and 3,000–5,000 charge cycles — significantly longer than VRLA.
Full-color touchscreen with single-line mimic diagram, event logging, and security access control. Two communication slots for optional SNMP/Web cards. Programmable dry contacts — 1 input, 5 output — for facility integration.
Input, output, bypass, and maintenance bypass breakers integrated in the cabinet. Maintenance bypass enables safe on-site servicing without powering down the load. No external switchgear required.
High overload capacity handles startup surges from motors, compressors, and inductive loads without nuisance tripping or transfer to bypass. Appropriate for industrial and facility environments with variable load profiles.
Circuit boards are conformal coated for enhanced durability in industrial and high-humidity environments. Smart de-dust fan system is self-cleaning — reduces maintenance requirements and extends system service life in dusty environments.
Li90 vs traditional three-phase VRLA UPS systems
| Feature | Li90 lithium platform | Typical VRLA three-phase UPS |
|---|---|---|
| External battery cabinets | None — batteries internal | Required for extended runtime |
| Cabinet width | 12.6″ | 24–36″ |
| System weight (30kW) | ~483 lbs | 900–1,500 lbs |
| Battery service life | Up to 15 years | 3–5 years |
| Operating temperature | 50°C | 25–30°C |
| Battery service | Hot-swap — no downtime | Downtime planning required |
| Maintenance | Minimal — no replacement cycles | High — recurring replacement |
| Lifecycle cost | Lower | Higher |
Where the Li90 is deployed
Engineering documents
Talk to an engineer about the Li90
Model selection, runtime sizing, VRLA replacement guidance, installation planning, and battery module configuration.