ET1-3K Tower Online UPS with Built-in LiFePO4
Online double-conversion tower UPS with a high-capacity Class A LiFePO4 battery inside — 30–40 minutes of full-load backup in one cabinet, maintenance-free.
Product image
- Brand
- HighIdea
- Type
- Online double-conversion UPS (tower)
- Typical applications
- Servers, workstations, medical devices, labs, network core equipment
- Models in range
- ET1K, ET2K, ET3K
- Category
- UPS Power Supply
The ET1-3K series is the flagship of HighIdea's lithium UPS line: a true online double-conversion UPS with a Class A LiFePO4 battery integrated in the tower cabinet. Where a lead-acid system needs an external battery rack to reach 30 minutes of full-load backup, the ET1-3K does it in a single box roughly one-third the size.
The battery management system is engineered for high-current charging and full cell balancing, eliminating the low-current protection shutdowns that affect generic lithium conversions. All cells are new-production Class A — never second-life cells.
Key Features
- Built-in high-capacity Class A LiFePO4 battery — 1,200+ cycles, 10+ years float-charge life, maintenance-free
- True online double conversion with zero-millisecond transfer between mains, battery and bypass
- Full-load backup of 30–40 minutes (ET1K/ET2K/ET3K) without external battery cabinets
- DSP digital control with high-frequency PWM for stable, precise output
- Wide input range (110–300VAC) with three/four-level lightning protection for harsh grids
- Input power factor correction (PFC) above 0.98 — clean to the grid, low operating cost
- Output voltage selectable 220/230/240Vac, auto-adapting 50/60Hz
- Automatic power-on after outage recovery — suitable for unattended sites
- RS-232 standard; optional SNMP/Modbus/dry contacts and cloud IoT monitoring
Specifications
| Capacity | 1 / 2 / 3 kVA |
|---|---|
| Topology | Online double conversion (VFI) |
| Battery | Built-in LiFePO4 with BMS |
| Backup time (full load) | 30–40 minutes |
| Input voltage range | 110–300 VAC |
| Output voltage | 220 / 230 / 240 Vac (selectable) |
| Output waveform | Pure sine wave |
| Input power factor | 0.98+ (PFC) |
| Transfer time | 0 ms |
| Form factor | Tower |
| Communication | RS-232; optional SNMP / Modbus / dry contacts / cloud card |
| Battery cycle life | 1 |
Specifications subject to the latest factory data. Final configuration is sized against the actual load, backup runtime and site power conditions — this table is for pre-selection only.
Applications
Office servers & workstations
One tower unit keeps the server, switch and workstations alive through outages — no separate battery cabinet needed.
Medical & laboratory equipment
Zero-transfer online protection for devices that cannot tolerate any interruption or waveform distortion.
Unattended & remote sites
Automatic power-on after recovery and cloud monitoring support make it fit for base stations and remote rooms.
FAQ
How long does it run at full load?
Is the battery replaceable or maintenance-free?
Can the output voltage be set to my market standard?
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