2U Lithium UPS | 1000VA/1000W | 48VDC | 1-20A Charging | BMS
Prostar PER1101+Li is a 1000VA/1000W lithium ion UPS. It has 2U rack-mount form factor, integrated LiFePO4 battery technology, and a 90° rotatable LCD. It installs as a 2U rack mount UPS or a tower UPS. This is suitable for servers, networking equipment, telecom devices, security systems, workstations, and other critical electronic loads.
Compared with lead-acid UPS systems, the PER1101+Li uses LiFePO4 technology. LiFePO4 offers 2,000–5,000 charge cycles, 90–120 Wh/kg energy density, and no routine watering or equalization. The chassis fits rack or tower positions. Its rotatable LCD, compact 2U chassis, and 1000W output make it particularly suitable for space-constrained IT environments.

Modern IT and electronic equipment needs compact, reliable, and low-maintenance backup power. Conventional UPS systems create several problems.
A lead-acid UPS may need battery replacement every 3–5 years. It occupies 3–5 U of rack space or 0.3–0.8 m² of floor area. It weighs 15–25 kg for a 1000VA model. Many UPS systems mount only in racks or only as towers.
This creates a problem for system integrators and IT managers:
The PER1101+Li 1000VA lithium ion UPS addresses these requirements. It combines LiFePO4 batteries, two installation methods, 1000W output in 2U, and local monitoring via LCD and ports.
The PER1101+Li is a 1000VA/1000W lithium ion UPS. It targets applications where space, battery cycle life, installation flexibility, and power protection matter.
Its mechanical feature is the 2U chassis with a 90° rotatable LCD.
The same UPS configures for:
Rack installation → rotate the LCD → install horizontally in a standard rack
or
Tower installation → rotate the LCD → place the UPS vertically beside the equipment
This produces an adaptable rack mount lithium ion UPS. You do not choose between rack and tower at purchase.
The 90° rotatable LCD improves interface readability according to physical orientation.
| Installation Mode | LCD Orientation | Typical Application |
| Rack Mount | Rotated for horizontal installation | Server racks, network cabinets, telecom racks |
| Tower | Rotated for vertical installation | Offices, security rooms, control rooms |
| Distributed IT | Adjustable according to deployment | Branch offices, retail, small server rooms |
| System Integration | Flexible | OEM/ODM and project applications |
This attracts IT system integrators, UPS distributors, telecom installers, and professional users who need one UPS platform for multiple deployments.

The battery determines backup runtime and operating cost.
A UPS may have efficient power electronics, but backup performance and total cost depend on battery chemistry.
The PER1101+Li uses a LiFePO4 lithium battery, a lithium-ion chemistry widely selected for applications requiring a combination of safety, cycle life, stability, and compact energy storage.
Compared with conventional VRLA lead-acid batteries, LiFePO4 technology can provide important system-level advantages.
| Factor | LiFePO4 Lithium Ion UPS | Conventional VRLA UPS |
| Battery Chemistry | Lithium Iron Phosphate | Lead Acid |
| Energy Density | Higher | Lower |
| Expected Battery Service Life | Generally longer | Generally shorter |
| Weight | Lower | Higher |
| Maintenance | Lower | Higher |
| Space Efficiency | Excellent | Moderate |
| Cycle Performance | Excellent | Moderate |
| Suitability for Frequent Cycling | Better | More limited |
| Long-Term Replacement Requirement | Reduced | More frequent |
The exact battery life depends on operating temperature, charging conditions, depth of discharge, load profile, battery management, and other environmental factors. Therefore, lithium technology should not be evaluated simply by battery capacity; the complete UPS + battery management + thermal environment + load profile should be considered.
| Parameter | Specification |
| Model | PER1101+Li |
| Capacity | 1000VA / 1000W |
| Topology | Online Double Conversion |
| Phase | Single Phase |
| Form Factor | Rack Mounted |
| Dimension (D×W×H) | 440x420x88 mm [2U] |
| Net Weight | 6.5 kg |
| Parameter | Specification |
| Input Voltage Range | Nominal Voltage ±15% |
| Frequency Range | 50Hz: 44-56Hz / 60Hz:54-66Hz |
| Input Power Factor | ≥0.99 |
| Input THDi | <6% |
| Output Voltage | 208/220/230/240VAC Selectable |
| Voltage Regulation | ±1% (Battery Mode) |
| Output Waveform | Pure Sine Wave |
| Transfer Time | 0ms |
| Battery Frequency Accuracy | 50Hz/60Hz ±0.1% |
| Crest Factor | 3:1 |
| Parameter | Specification |
| Battery Type | LiFePO4 Lithium / Lead Acid |
| Nominal Battery Voltage | 48VDC (51.2VDC LiFePO4) |
| Charging Current | 5A Default, Adjustable 1-30A |
| Charging Mode | CC/Floating or CC/CV/Floating |
| Battery Protection | Over-charge, Over-discharge, Over-current, Short Circuit, Temperature Protection |
| Communication Ports | USB / RS232 / RS485 |
| Smart Slot | SNMP / Dry Contact Optional |
| BMS Protocol | Pylontech RS485 & CANbus |

| 1. External Battery Connector | 2. Emergency Power Off(Option) | 3. RS485 Port for BMS |
| 4. USB Port | 5. AC Output Sockets | 6. Grounding |
| 7. Intelligent Slot(for SNMP Card or AS400 Dry Contact) | 8. Input Circuit Breaker | 9. AC Input Terminal |
The PER1101+Li provides 1000VA / 1000W output capacity.
The 1:1 VA-to-Watt relationship is particularly useful for modern electronic loads because the UPS can deliver its rated apparent power without requiring users to significantly derate the connected load due to a low output power factor.
Typical applications include:
For example, a load consisting of a server, network switch, router, and storage device can potentially be consolidated into a compact UPS-protected power architecture, provided the actual total load remains within the UPS’s rated output and transient requirements.
Space inside an IT rack is expensive.
A 2U lithium ion UPS allows power protection to be integrated directly into a standard rack architecture without requiring a separate floor-standing UPS cabinet.
This is especially useful for:
The UPS can be installed together with servers, switches, firewalls, storage devices, and other network infrastructure.
Distributed computing locations often have limited physical space and require compact backup power.
Rack-mounted UPS systems can protect communication and networking equipment while maintaining an organized cabinet layout.
A compact rack UPS can provide professional backup power without requiring a dedicated UPS room.
CCTV servers, network video recorders, access-control systems, and communication equipment can benefit from centralized backup power.

One of the strongest differentiators of the PER1101+Li is its rotatable LCD interface.
For a conventional rack UPS, the LCD is normally designed around horizontal rack installation. If the same unit is used as a tower, the display orientation may become inconvenient.
PER1101+Li solves this through a 90-degree rotatable LCD.
Rack Mount Configuration
The UPS is installed horizontally inside the rack. The LCD is rotated so that the interface remains correctly oriented for the operator.
Tower Configuration
The UPS is positioned vertically using the appropriate tower installation arrangement. The LCD can be rotated 90° so the information remains easy to read.
This design provides a practical advantage for distributors and system integrators because the same product can address two installation requirements.
| MODEL | PER1101+Li | |
| CAPACITY | 1000VA/1000W | |
| Form Factor | Rack Mounted | |
| Size, W X D X H (mm) | 440x420x88 [2U] | |
| Net Weight (kgs) | 6.5 | |
| INPUT | ||
| Voltage Range | Low Line Transfer | 176Vac (Load ≥100%); 176–110Vac (Load 100%–50%); 110Vac (Load ≤50%) |
| Low Line Recovery | Low transfer voltage + 10 V | |
| High Line Transfer | 300 Vac ±5% | |
| High Line Recovery | 290 Vac ±5% | |
| Frequency Range | 50Hz:44-56Hz or 60Hz: 54-66Hz | |
| Phase | Single Phase, L+N+PE | |
| Power Factor | ≧ 0.99 @ nominal voltage (input voltage) | |
| Harmonic Distortion(THDi) | < 6% | |
| OUTPUT | ||
| Output Voltage | 208/220/230/240VAC (Selectable) | |
| AC Voltage Regulation | ± 1% (Batt. Mode) | |
| Frequency Range(AC Mode) | Synchronized to Mains | |
| Frequency Range (Batt. Mode) | 50Hz or 60Hz ± 0.1% | |
| Current Crest Ratio | 3:1 | |
| Harmonic Distortion(THDv) | <3% THD (Linear Load), <6% THD (Non-linear Load) | |
| Transfer Time | AC to Battery | 0ms |
| Battery to AC | 0ms | |
| Inverter to Bypass | 4ms | |
| Waveform | Pure Sine Wave | |
| Overload Capacity | AC Mode: Battery Mode: 30mins @102%-110% load 1min @102%-110% load 10mins @110%-130% load 10sec @110%-130% load 30sec @130%-150% load 3sec @130%-150% load 200ms @>150% load 200ms @>150% load |
|
| EFFICIENCY | ||
| AC Mode | > 93% | |
| Battery Mode | > 91.2% | |
| BATTERY | ||
| Battery Type | LiFePO4 Lithium / Lead-Acid | |
| Nominal Battery Voltage | 48VDC (51.2VDC for LiFePO4) | |
| Charging Current | 5A(Default),1A-20A | |
| Charging Voltage | 56.4VDC (14.1V * N) | |
| Charging Algorithm | 2-stage (CC/Floating) or 3-stage (CC/CV/Floating) | |
| BMS Protection | Over-charge, Over-discharge, Over-current, Short-circuit, Over-temp, Under-temp | |
| Integrated Functions | Auto Restart, Self-Test Function, Smart Battery Management | |
| ECO | ||
| Input Voltage Range | Nominal Voltage ± 15% | |
| Input Frequency Range | 50Hz / 60Hz ± 4Hz | |
| ENVIRONMENT | ||
| Ambient Temperature | 0°C – 40°C | |
| Operating Humidity | 20%-95% (Non-condensing) | |
| Storage Temperature | -15~60℃ (Excluding battery) | |
| Altitude | 1000 m (derate for higher altitudes up to 4000 m) | |
| Noise Level | Less than 50dBA @ 1 Meter | |
| COMMUNICATION | ||
| Communication Interface | USB, RS485 for BMS | |
| BMS Protocol Support | Native support for Pylontech RS485 and CANbus protocols | |
| Expansion Slot | Smart Slot for optional SNMP / Dry Contact cards | |