The Voltrix C6KL-Li (Tower) and R6KL-Li (Rack 2U) are 6 kVA / 5.4 kW high-frequency online double-conversion (VFI) UPS systems built on a 64-cell LiFePO4 external battery module (204.8 V). LiFePO4 chemistry delivers up to 3× the backup time of a comparable lead-acid UPS in a lighter, more compact footprint, with a service life exceeding 2,000 charge/discharge cycles. Runtime is set by the external battery module, which is ordered separately and sized to the autonomy required.
DSP digital control, active input power factor correction (> 0.99) and a wide 90 ~ 300 VAC input window make the pair fully compatible with generator sets and unstable grids. Dry contact and MODBUS (RS485) interfaces give direct BMS integration, and the 4-state lithium charger (CC / CV / Floating / Turn-off) can be customised to the battery pack. Both form factors share identical electrical performance — choose Tower for desktop or floor placement, or the 2U Rack model for standard 19-inch cabinets.
Technical Specifications — C6KL-Li / R6KL-Li — 6 kVA / 5.4 kW
| AC INPUT | |
|---|---|
| Input System | Single Phase (L/N+PE) |
| Nominal Voltage | 208/220/230/240 VAC |
| Voltage Range | 90 ~ 300 VAC |
| Frequency | 50 / 60 Hz |
| Frequency Range | (40 ~ 70) ± 0.5 Hz |
| Input Power Factor | > 0.99 |
| AC OUTPUT | |
| Output Wiring System | Single Phase (L/N+PE) |
| Inverter Output Voltage | 208/220/230/240 VAC ±1% |
| Output Frequency | 50/60 Hz ±4 Hz (Sync mode) 50/60 Hz ±0.1 (Fix freq. mode) |
| Waveform | Pure Sine Wave |
| Harmonic Distortion | THD < 2% (linear) THD < 8% (non-linear) |
| Overload Capability | 100~105%: continuous 105~125%: 10 min |
| 126~150%: 60 sec >150%: 0.3 sec | |
| Transfer Time | Line ↔ Battery: 0 ms |
| EFFICIENCY | |
| Line Mode | > 92% |
| Battery Mode | > 90% |
| LITHIUM BATTERY INPUT | |
| Charging Voltage | 204.8 V (64-cell LiFePO4, 3.2V/cell) Customisable on request |
| Battery Capacity | External Battery Module |
| Charging Current | 4A / 8A (optional, long backup model) |
| Charger Behaviour | CC · CV · Floating · Turn-off (4-state) |
| Protection | 3 over-voltage loop, over-temp / over-pressure interface |
| PHYSICAL | |
| Tower Dim. W×D×H (mm) | 190×396×323 |
| Rack Dim. W×H×D (mm) | 440×493×88 (2U) |
| Tower Net Weight (kg) | 9.9 |
| Rack Net Weight (kg) | 10.3 |
Key Features
- Online double-conversion (VFI) topology — 0 ms transfer, pure sine wave output
- LiFePO4 lithium battery, 64-cell (204.8 V) — more than 2,000 charge/discharge cycles
- Up to 3× backup time vs. a comparable lead-acid UPS, at a fraction of the weight
- Wide input range 90 ~ 300 VAC, (40 ~ 70) ± 0.5 Hz — generator compatible, cold start and ECO mode
- Active input power factor correction > 0.99
- Efficiency: line mode > 92%, battery mode > 90%
- 4-state lithium charger (CC / CV / Floating / Turn-off), charging current 4A / 8A (optional, long backup model)
- 50/60 Hz auto-sensing and frequency-converter mode
- RS232 standard; optional USB (1–3 kVA), SNMP / TCP-IP network card for remote monitoring, dry contact for BMS dominant control and MODBUS (RS485) card for BMS integration
Ordering Information
| Voltrix Model | Form Factor | Apparent / Active Power | Battery | Part Number |
|---|---|---|---|---|
| C6KL-Li | Tower | 6 kVA / 5.4 kW | 64-cell LiFePO4 (204.8V) | VTX-C6KL-Li |
| R6KL-Li | Rack 2U | 6 kVA / 5.4 kW | 64-cell LiFePO4 (204.8V) | VTX-R6KL-Li |
Downloads
Certifications & Warranty
Designed and manufactured under ISO 9001:2015. CE (EU Declaration of Conformity), IEC/EN 62040-1 (UPS Safety), IEC/EN 62040-2 (UPS EMC — Class C2), RoHS 2011/65/EU. 2-year UPS system warranty, return-to-base, parts and labour; LiFePO4 battery warranty 2 years or 2,000 full charge-discharge cycles, whichever occurs first. 24/7 technical support with response within 4 hours.
Specifications subject to change without notice. Battery cycle life and backup time are indicative and may vary with operating temperature, load profile and discharge history. Voltrix is a registered brand of Heizka. All trademarks are property of their respective owners.
