Eaton 9355 UPS — 20 kVA Three-Phase Online Double-Conversion
Compact Footprint • Internal Batteries • Integrated Distribution • Maintenance Bypass • HotSync Paralleling (Up to 4 Units)
The Eaton 9355 UPS (20 kVA) (formerly the Powerware 9355) is a three-phase, online double-conversion UPS engineered to deliver complete power protection for mission-critical loads. Designed for facilities that need reliable uptime without sacrificing floor space, the 9355 provides enterprise-grade conditioning in a cabinet footprint up to 75% smaller than comparable UPS systems.
Unlike many traditional three-phase solutions that require large external battery cabinets, the 9355 comes configured with internal batteries, an integrated power distribution module, and an integrated maintenance bypass switch—making deployment faster and reducing installation complexity. When requirements grow, Eaton’s patented HotSync paralleling technology allows you to parallel up to four UPS units to add capacity or redundancy while maintaining a compact overall footprint.
Key Features & Benefits
- 20 kVA three-phase protection — Built for critical power needs in IT and facility environments.
- Online double-conversion — Continuous power conditioning and zero transfer time for sensitive loads.
- Up to 75% smaller footprint — Saves floor space versus comparable three-phase UPS systems.
- Internal batteries included — Reduces reliance on large external battery cabinets.
- Integrated distribution module — Simplifies deployment and downstream power integration.
- Integrated maintenance bypass — Enables safer service without interrupting protected loads.
- HotSync paralleling — Parallel up to four units for redundancy or capacity expansion with less space.
Best-Fit Applications
- Server rooms & edge IT — Compact three-phase protection where floor space is limited.
- Healthcare & clinical IT — Clean, conditioned power for sensitive systems and continuity needs.
- Education & enterprise — Reliable UPS protection with flexible growth via paralleling.
- Light industrial — Stable power for controls, automation, and facility loads.
Technical Overview
| Category |
Detail |
| UPS Model |
Eaton 9355 (Powerware 9355) |
| Capacity |
20 kVA |
| Phase |
Three-Phase |
| Topology |
Online Double-Conversion |
| Footprint |
Up to 75% smaller than comparable UPS systems (application dependent) |
| Included Components |
Internal batteries, integrated power distribution module, integrated maintenance bypass switch |
| Scalability |
Parallel up to 4 units via HotSync technology (for redundancy and/or capacity) |
Why buy from Gruber
- Correct sizing & deployment — We help match voltage, distribution, and runtime goals to your facility load.
- Battery & service planning — Guidance on internal battery maintenance, replacement strategy, and lifecycle support.
- Critical-power expertise — Decades of UPS integration experience across data center, medical, and industrial environments.
