Description
The APS-RTx PowerLine Flex PL31-20K-P2-B2-KIT is a scalable 20kVA / 20kW online UPS system comprising 2 parallel PL31 FL 10.0k HC power modules and 2 PL31-BR20120FL external battery boxes.
The two 10kVA / 10kW power modules operate in parallel, providing a combined system capacity of 20kVA / 20kW while maintaining flexibility for further capacity expansion.
Using online double-conversion technology, connected equipment is continuously supplied through the UPS inverter, providing stable, conditioned power with zero transfer time during utility failure.
Each power module delivers a 1.0 output power factor, allowing the complete system to provide up to 20kW of usable active power.
The system uses a 3-phase input / single-phase output architecture, making it suitable for facilities with three-phase utility supplies and critical single-phase loads.
Each included PL31-BR20120FL battery box contains 20 × 12V 9Ah maintenance-free VRLA batteries and provides approximately 2.16kWh of nominal stored battery energy. With two battery boxes, the complete system provides 4.32kWh nominal battery capacity.
The modular architecture supports up to 4 PL31 FL 10.0k HC power modules in parallel, allowing the system to expand to a maximum capacity of 40kVA / 40kW.
Additional compatible battery boxes may also be incorporated where longer backup duration is required.
Key Features
- 20kVA / 20kW total UPS capacity
- 2 power modules included
- 2 × 10kVA / 10kW power modules
- 2 battery boxes included
- 4.32kWh nominal battery capacity
- 1.0 output power factor
- Online double-conversion technology
- 3-phase input / 1-phase output
- Parallel UPS architecture
- Zero transfer time from utility to battery
- Pure sine-wave output
- Rack/Tower convertible power modules
- 208–478VAC three-phase input range
- 220 / 230 / 240VAC output
- Input power factor ≥0.99
- Supports up to 4 power modules in parallel
- Expandable to 40kVA / 40kW
- Generator compatible
- ECO operating mode
- LCD status display
- USB communication
- RS232 communication
- Intelligent communication slot
- 2 × 2.16kWh battery boxes included
- 40 × 12V 9Ah batteries included
- ±120VDC battery system per battery box
- Additional battery capacity can be added
- Overload, short-circuit and battery protection
Typical Applications
Suitable for:
- Server rooms
- Data centres
- Banking and financial systems
- Network infrastructure
- Telecommunications equipment
- CCTV and security systems
- Access-control infrastructure
- Communications racks
- Business-critical IT systems
- Industrial control systems
- Automation systems
- Laboratory equipment
- Critical office infrastructure
System Technical Specifications
| Specification | PL31-20K-P2-B2-KIT |
|---|---|
| System Type | Parallel Online UPS System |
| UPS Technology | Online Double Conversion |
| Rated Capacity | 20,000VA / 20,000W |
| Output Power Factor | 1.0 |
| Power Modules Included | 2 |
| Power Modules | 2 × PL31 FL 10.0k HC |
| Capacity per Module | 10kVA / 10kW |
| Battery Boxes Included | 2 |
| Input Phase | 3 Phase + Neutral + Earth |
| Output Phase | Single Phase |
| Nominal Input Voltage | 380 / 400 / 415VAC |
| Input Operating Range | 208–478VAC |
| Output Voltage | 220 / 230 / 240VAC |
| Output Frequency | 50 / 60Hz |
| Output Waveform | Pure Sine Wave |
| Transfer Time | 0ms |
| Parallel Capability | Yes |
| Maximum Power Modules | 4 |
| Maximum Expandable Capacity | 40kVA / 40kW |
| Generator Compatible | Yes |
| Communications | USB, RS232, Intelligent Slot |
| Power Module Installation | Rack / Tower |
| Power Module Rack Height | 3U each |
| Battery Box Rack Height | 3U each |
| Combined Rack Space | 12U |
Included Battery System
| Specification | Battery System |
| Battery Box Model | PL31-BR20120FL |
| Battery Boxes Included | 2 |
| Batteries per Box | 20 × 12V 9Ah |
| Total Battery Quantity | 40 × 12V 9Ah |
| Battery Technology | Maintenance-Free VRLA |
| Battery System Voltage | ±120VDC per box |
| Nominal Energy per Box | 2.16kWh |
| Total Nominal Battery Energy | 4.32kWh |
| Enclosure | Rack-Mount Battery Boxes |
| Rack Height | 3U each |
Battery Capacity
Each included battery box provides:
20 × 12V × 9Ah = 2.16kWh nominal battery capacity
With two battery boxes:
2 × 2.16kWh = 4.32kWh nominal battery capacity
Actual backup time depends on:
- Connected system load
- Battery age and condition
- Ambient temperature
- Battery discharge rate
- UPS operating efficiency
Compared with the PL31-20K-P2-B1-KIT, this configuration doubles the nominal battery capacity while retaining the same 20kVA / 20kW UPS output capacity.
What’s Included
UPS Power Modules
2 × PL31 FL 10.0k HC
Each module provides:
- 10kVA / 10kW
- PF1.0
- 3-phase input
- Single-phase output
- Rack/Tower configuration
- Parallel capability
Combined UPS capacity: 20kVA / 20kW
Battery Boxes
2 × PL31-BR20120FL
Each battery box includes:
- 20 × 12V 9Ah batteries
- ±120VDC
- 2.16kWh nominal energy
- 3U rack enclosure

APS-RTx PowerLine Flex PL31-10K-P1-B1 – 10kVA/10kW Online UPS System with 1 Power Module and 1 Battery Box
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