ACS-Li Series 1–3kVA Online Tower UPS is a lithium-battery online UPS designed to provide continuously regulated sine-wave power with compact battery integration and intelligent battery communication.
Lithium battery platform: The series covers 1–3kVA with internal lithium-battery standard models and external-battery long-backup configurations.
Full active power: Output power factor of 1.0 allows full kW output across the rated capacity range.
Dual AC voltage platforms: Depending on model, output voltage options include 100–125Vac or 200–240Vac.
BMS-ready monitoring: RS232, optional USB/SNMP, intelligent slot, EPO, Modbus/RTU settings and RS485 BMS communication support lithium-battery monitoring.
Final configuration depends on AC voltage platform, capacity, internal or external lithium battery design, battery voltage, BMS protocol, runtime and project requirements.





| Model | SS001B-LI | SS002B-LI | SS003B-LI | |
|---|---|---|---|---|
| Rate Power | 1kVA/1kW | 2kVA/2kW | 3kVA/3kW | |
| Cold Start | Default output 50/60Hz | |||
| Input Voltage Range | 110-300VAC; 100% load @176VAC-276VAC; 100%-50% power derating @110VAC-176VAC; 50% load @276VAC-300VAC | |||
| Input Power Factor | ≥0.99 | |||
| Frequency Range | 50/60±5Hz (default), ±3Hz (settable) | |||
| Output Power Factor | 1.0 | |||
| Output | Rate Voltage | 208VAC/220VAC/230VAC/240VAC | ||
| Load Response | ≤5% (0% - 100% - 0%) | |||
| Recovery Time | ≤40ms (0% - 100% - 0%) | |||
| Output THDu | ≤2%, Linear load; ≤5% non-linear load according to IEC 62040-3 | |||
| Socket (Option) | IEC, Schuko, NEMA, South Africa, UK | |||
| Transfer Time | Main to BAT | 0ms | ||
| INV to BYP | 4ms | |||
| Crest Factor | 3:1 | |||
| Efficiency (Normal Mode) | Up to 95.0% | Up to 95.5% | ||
| Noise (1 meter) | 45dB @ >70% load or >6A charge | 50dB @ >70% load or >6A charge | ||
| Overload | Normal | 102%-110%: 30mins; 110%-125%: 10mins; 125%-150%: 30 seconds | ||
| Battery Mode | 102%-110%: 1min; 110%-125%: 10 seconds; 125%-150%: 5 seconds | |||
| Bypass Mode | <130%: long time; 130%-150%: 10mins; 150%-180%: 5 seconds | |||
| Battery | Model | 12.8VDC/9Ah for standard model | ||
| Quantity | 2/3 | 4/6 | 6/8 | |
| Max Charging | 1-4A (optional) | 1-4A (optional) | 1-4A (optional) | |
| Rate Voltage | 25.6VDC/38.4VDC | 51.2VDC/76.8VDC | 76.8VDC/102.4VDC | |
| Standard | EPO, RS232 | |||
| Option | SNMP card, AS400, USB, RS485, Air filter | |||
| Dimension (W*D*H) mm | 144 × 350 × 223 | 190 × 400 × 328 | 190 × 400 × 328 | |
| Weight (kg) | 16.6 / 19.1 | 21.5 / 26.7 | 26.7 / 31.5 | |