PCM125/PCM250 Bidirectional PCS Module

  • PCM125/PCM250 Bidirectional PCS Module
    PCM125
  • PCM125/PCM250 Bidirectional PCS Module
    PCM250

PCM125 is a modular bidirectional converter module designed for small and medium-sized energy storage systems, which can be connected in parallel with multiple units under centralized monitoring. The power module supports flexible layout, easy installation, and convenient maintenance.

With a compact design and lightweight, rack-mounted structure, the module supports a wide DC voltage range and offers strong adaptability to varying grid and load conditions.

Features
Flexible System Expansion

    Multiple PCS modules can operate in parallel to increase the installed capacity of the energy storage system.

Multiple Operating Modes

    Supports PQ, VF, and VSG modes, as well as on-grid charging, on-grid discharge, and off-grid operation.

Efficient Power Conversion

    Three-level control technology helps improve conversion efficiency and power quality.

Wide Battery Compatibility

    The wide DC input range supports different battery combinations and charging/discharging requirements.

Grid And Load Adaptability

    Supports grid dispatch through RS485, CAN, and LAN communication, with reactive power compensation and 100% unbalanced load capability in off-grid mode.

Reliable Operation And Maintenance

    Supports long-term operation at 110% rated output power, dual AC/DC redundant control power supply, front-to-rear airflow, and full front maintenance.

Specification
Model PCM125-H PCM250
Battery Port Parameters Voltage range 580–950 VDC (3W3L) 1000–1500 VDC (3W3L)
650–950 VDC (3W+N)
Max. DC power - 275 kW
Max. DC current 230 A 275 A
AC On-Grid Parameters Output wiring 3W+N+PE 3W+PE
Rated power 125 kW 250 kW
Rated voltage 400/380 VAC 690 VAC
Rated current 181 A 210 A
Voltage range -15% to +10% -15% to +10% (configurable)
Rated frequency 50/60 Hz 50 Hz (±10%)
Frequency range ±2 Hz -
Output current THD ≤3% (rated power) ≤3% (rated power)
AC Off-Grid Parameters Output wiring 3W+N+PE 3W+PE
Rated power 125 kW 250 kW
Rated voltage 400/380 VAC 690 VAC
Rated frequency 50/60 Hz 50 Hz
Rated current 181 A 210 A
Voltage accuracy 100% -
Frequency accuracy ±0.2 Hz -
Output voltage THD 3% (linear full load) ≤3% (rated power)
Unbalanced load capability 100% -
Overload capacity ≤110%: continuous operation;
110%–120%: operation time ≥10 min;
120%: operation halted after 1 min 		≤10%: 10 min operation time; 110%–120%: operation halted after 1 min
Environment Operating temperature -30°C to 70°C (derating above 45°C) -40℃ to 60℃ (derating above 45℃)
Storage temperature -40°C to 70°C, no battery -40℃ to 70℃, no battery
Relative humidity 0–95% RH, non-condensing 0–95% RH, non-condensing
Operating altitude ≤4000 m (derating above 2000 m) ≤3000m (derating above 3000 m)
Communication & Management BMS communication port CAN / RS485 CAN / RS485
EMS communication port LAN / RS485 LAN / RS485
Communication protocols CAN2.0 / Modbus RTU / Modbus TCP Modbus RTU / Modbus TCP / IEC104 / CAN2.0
Installation Method Rack-mounted Rack-mounted
Isolation Method Non-isolated Non-isolated
Protection Rating IP20 (indoor use only) IP66
Cooling Method Fan cooling, intelligent air speed control Air cooling, intelligent fan speed control
Max. Efficiency 98.5% 98.6%
Dimensions (W×D×H) 642×540×172 mm 740×1040×220
Weight 62 kg 100 kg
Airflow Direction Front air intake, rear air exhaust Front air intake, rear air exhaust
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Why Do We Need Energy Storage System?

Battery energy storage system (BESS) is developed due to insufficient energy or great difference in electricity price. SCU provides complete hybrid solar energy storage system solutions with integrated functions including energy storage, peak shaving, short-duration power expansion, and grid power quality management.