Li90 vs Eaton 9355
Engineers modernizing facility-level three-phase UPS in the 10–30 kVA range often weigh the Xtreme Power Li90 against the Eaton 9355. Both deliver true online double-conversion protection with internal batteries for 208/120 V applications; the difference is strategy — the Li90 is a lithium-integrated modernization platform with unity power factor and reduced electrical-room burden, where the 9355 is a widely deployed VRLA platform with established replacement assumptions.
Why engineers evaluate the Li90
- Integrated, modular internal lithium (LiFePO₄) battery architecture
- Extended battery lifecycle vs VRLA — up to 15 years / 3,000–5,000 cycles
- Unity (1.0) output power factor — more usable real power (kW)
- Operating efficiency up to 94.5%
- Reduced lifecycle battery replacement planning
- Compact cabinet — improved electrical-room density
- Simplified retrofit / modernization strategy
Facility UPS comparison · 10–30 kVA
| Feature | Xtreme Power Li90 Series | Eaton 9355 Series | Advantage / consideration |
|---|---|---|---|
| Capacity range | 10–30 kVA | 10–30 kVA | Comparable facility deployment class |
| Output voltage | 208/120 V three-phase | 208/120 V three-phase | Aligned North American compatibility |
| Battery chemistry | Lithium iron phosphate | VRLA | Li90 — extended lifecycle |
| Battery architecture | Modular internal lithium modules | Internal VRLA modules | Li90 — lifecycle & serviceability |
| UPS topology | Online double-conversion | Online double-conversion | Equivalent conditioned power |
| Output power factor | Unity (1.0) | 0.9 | Li90 — more usable real power |
| Operating efficiency | Up to 94.5% | 91% | Li90 — lower energy losses |
| Lifecycle maintenance | Reduced battery replacement | Periodic VRLA replacement | Li90 — predictable lifecycle cost |
| Runtime strategy | Modular internal lithium scalability | Internal VRLA + expansion | Comparable, differing lifecycle assumptions |
| Maintenance bypass | Integrated | Integrated | Equivalent serviceability |
| Monitoring | Enterprise SNMP / network | Enterprise SNMP / network | Comparable integration |
| Infrastructure modernization | Retrofit-oriented platform | Conventional replacement model | Li90 — modernization advantage |
Specifications based on publicly available manufacturer documentation; verify against current Eaton data. Both platforms are online double-conversion; the Li90 uses LiFePO₄.
Choosing between them
Facility three-phase UPS in the 10–30 kVA range protects healthcare imaging infrastructure, industrial automation, commercial-building modernization, telecom power rooms, and distributed mission-critical loads. The Li90 brings integrated lithium to this class — cutting battery-replacement planning and electrical-room burden versus a VRLA platform, while unity power factor delivers more usable kW from the same kVA.
Choose the Li90 if you need
- Integrated internal lithium — no external battery cabinets
- Reduced battery maintenance and predictable lifecycle cost
- Unity (1.0) power factor for more usable kW
- A compact footprint for limited electrical-room space
- A retrofit-oriented path to modernize legacy VRLA infrastructure
The Eaton 9355 may fit if you need
- Standardization on Eaton / existing 9355 service
- A conventional VRLA replacement model in place
- Established centralized battery-maintenance practices
Related Li90 comparisons
Plan your lithium UPS modernization
Xtreme Power supports facility engineers and infrastructure planners with lithium UPS modernization strategy, lifecycle cost modeling, and deployment architecture guidance.