ET1-6KRS Online Rack Lithium Battery UPS
1–6kVA online rack platform with modular lithium battery selection — choose the runtime by choosing the packs.
Product image
- Brand
- HighIdea
- Type
- Online double-conversion UPS (rack)
- Typical applications
- Server racks, data centers, telecom equipment, industrial control
- Models in range
- ET1KRS, ET2KRS, ET3KRS, ET6KRS
- Category
- UPS Power Supply
The ET1-6KRS is the flexible middle of the ET rack line: the UPS chassis and the lithium battery packs are separate, so runtime is a configuration choice rather than a chassis constraint. Pair one 6kVA unit with two packs for compact sites, or more packs when the load profile demands longer autonomy.
Key Features
- Online double conversion with pure sine wave output and 0 ms transfer
- Modular battery selection — external 48V LiFePO4 packs, 15S or 16S (15S factory default)
- DSP-controlled high-frequency conversion for high efficiency
- Wide input window 172–268 VAC with generator compatibility
- LCD status display with battery health and runtime estimation
- SNMP / Modbus / dry-contact options and cloud monitoring support
Applications
Growing server rooms
Start with one pack per UPS and add capacity as the load grows — no forklift upgrade needed.
Telecom equipment rooms
Rack format and remote monitoring suit sheltered and unattended telecom sites.
FAQ
Which battery packs work with it?
What is the difference to the ET1-3KR?
Related Models
ET1-3KR Series
The ET1-3K platform in a 19-inch 2U rack chassis — lithium runtime and online protection for standardized server cabinets.
View detailsET6/10KRS PRO Series
6–10kVA online rack UPS purpose-engineered for long-duration lithium backup — single-phase or three-phase input, single-phase output.
View detailsHC Rack-Mount Battery
A 19-inch chassis, 440 mm wide, with front terminals and a state-of-charge display — the format a telecom or IT technician already knows how to service.
View detailsSpecification reference
| Parameter | ET1KRS | ET2KRS | ET3KRS | ET6KRS |
|---|---|---|---|---|
| General | ||||
| Rated output capacity | 1,000 VA / 900 W | 2,000 VA / 1,800 W | 3,000 VA / 2,700 W | 6,000 VA / 5,400 W |
| Working mode | Online double conversion | |||
| Control | DSP digital control + high-frequency PWM | |||
| Form factor | 19-inch rack, 2U | |||
| AC input | ||||
| Nominal voltage | 220 VAC (230 / 240 VAC selectable) | |||
| Nominal frequency | 50/60 Hz auto-sensing | |||
| Input voltage range | 172–268 VAC (±7 VAC) | |||
| Input frequency range | 45–55 Hz / 55–65 Hz (±0.5 Hz) | |||
| Battery (external) | ||||
| Nominal battery voltage | 48 V | |||
| Cell type | Class A LiFePO4 | |||
| Cell string requirement | 15S / 16S (15S factory default) | |||
| External pack capacity required | >10 Ah | >20 Ah | >30 Ah | >50 Ah |
| Battery life | Float life 10+ years; 1,200+ cycles | |||
| Cell protection | Provided by the external pack BMS | |||
| Cell balancing | Provided by the external pack BMS | |||
| Fuel-gauge management | Configured to the installed pack | |||
| Low-voltage alarm / shutdown | 44 V / 42–60 V | |||
| Charge voltage | 54 ±0.3 V | |||
| Charge current | 5 A | 5 A | 5 A | 5 A default, expandable to 10–30 A |
| Charging method | Constant current, then constant voltage | |||
| Backup time | Determined by the connected pack capacity | |||
| AC output | ||||
| Output voltage | 220 VAC ±3% (230 / 240 VAC selectable) | |||
| Output frequency | 50/60 Hz ±5 Hz on mains; ±1% on battery | |||
| Dynamic voltage transient | <5% | |||
| Transient recovery time | <60 ms | |||
| Waveform | Pure sine wave; THD <3% linear, <8% non-linear | |||
| Output power factor | 0.8 | |||
| Overload capacity | 130% ≥20 s on mains; 120% ≥20 s on battery | |||
| Peak current factor | 3:1 | |||
| Transfer time (mains ↔ battery) | 0 ms | |||
| Transfer time (inverter ↔ bypass) | <4 ms | |||
| Communication & protection | ||||
| Communication | RS-232 standard; optional RS-485 (Modbus), dry contacts, SNMP | |||
| Protection | Battery over/under-voltage, overload, over-temperature, short circuit, output over/under-voltage | |||
| Mechanical | ||||
| Net weight | 6.5 kg | 9.5 kg | 10 kg | 14 kg |
| Net dimensions (W × H × D) | 440 × 88 × 310 mm | 440 × 88 × 440 mm | 440 × 88 × 440 mm | 440 × 88 × 500 mm |
| Packaging dimensions (W × H × D) | 538 × 190 × 402 mm | 538 × 168 × 538 mm | 538 × 168 × 538 mm | 538 × 168 × 600 mm |
| Environment | ||||
| Operating humidity | 20–90% RH, non-condensing | |||
| Altitude | No derating below 1,000 m; −1% per 100 m above | |||
| Storage temperature | −40 °C to +45 °C | |||
| Storage humidity | 20–90% RH, non-condensing | |||
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.