REFUstore 50K ...100K The next generation of bidirectional high power battery inverters DC-PRECHARGE OPTION Drastic reduction in BOS costs Maximum power density Easy serviceability Suitable for 2nd Life Battery Application The REFUstore battery inverter is based on the new inverter platform from REFU. This inverter is specifically designed for all high voltage batteries. With a rated power of 88 kW at 400V, it is perfectly suited for commercial behind-themeter applications such as self-consumption optimization or peak-shaving. Future Proof: The AC-coupled REFUstore can be easily integrated with existing PV systems. The highly modular solution allows it to be used in systems from 50 kW up to MWs in size to meet the demands of both energy and power applications. Maximum Performance: The REFUstore is highly efficient over a wide range of operation maximizing return on investment. With fast response times, the inverter achieves high control performance, making it suitable for time-critical applications. Design Flexibility: The REFUstore allows different communication protocols like Modbus RTU/TCP and Sunspec/ MESA. The higher flexibility in system design reduces BOS costs drastically. 2nd Life Application: With a min. DC voltage of 280V, the REFUstore 50K can be used in 2nd life battery applications with ease to support the grid for applications such as frequency regulation, optimizing self-consumption, peak shaving etc.

TECHNICAL DATA – POWERUNIT Art. No. Art. No. (DC-precharge integrated) Operation Mode DC DATA Max. voltage DC (V) Nominal voltage DC (V) DC start-up open circuit voltage, Usdc (V) DC voltage range at nominal power (V) DC connection PowerUnit - ConnectionBox 1 Plus, 1 Minus: Connector with Button Activated Coupling AC DATA Apparent power (kVA) Rated voltage AC 3-Phase, Uac (V) AC grid connection / Grid types Nominal power factor / Range Rated frequency / Frequency Range (Hz) Max. AC short circuit current (A rms) Inrush current (peak / duration) Maximum admissible external AC fuse Maximum admissible...

TECHNICAL DATA – POWERUNIT Art. No. Art. No. (DC-precharge integrated) Operation Mode GENERAL DATA Topology not allowed 4 LED's (DC status, AC status, Fault, Bluetooth®) / 2 Keys (Connect, Clear) Status display / Keys 2 × Ethernet Daisy-Chain / 2 × RS485, Bluetooth® BLE, 1 × Remote Off Signal Interfaces Communication Protocols Sunspec (Modbus TCP, Modbus RTU), USS (Ethernet, RS485) IEC 61000-6-2, IEC 61000-6-4 94 IEC 60068-2-1, -2-2, -2-30, -2-78, -2-14, -2-6, -2-27, -3-2, -2-75, IEC 60529, IEC 60034-9 93 DIN VDE V 0126-1-1, VDE AR-N 4105:2011-08, BDEW Prototype Declaration, 620 VDC Discharge...

TECHNICAL DATA – CONNECTIONBOX GENERAL DATA DC Switch DC Connection (+ / - ) AC Connection Type of protection (IEC 60529) Dimensions ConnectionBox W × H × D (mm) Weight (kg) no Ring terminal block (50 ... 240 mm²) L1, L2, L3: M10 / PE: M8 Ring terminal block (50 … 150 mm²) IP54 760

SINGLE LINE DIAGRAMS System Diagram REFUstore 100K-PC (421P100.000) (including integrated DC precharge) OVERALL SYSTEM Monitoring Portal Energy Meter AC grid relais Integrated DC precharge circuit (only 421Pxxx) DC + Grid Connection External precharge circuit (optional) Energy Management System (EMS) REFUstore 50K...100K Battery Inverter (ESS PCS) AC residual current detection DC precharge circuit (only 421Pxxx) Isolation monitoring REFUstore 100K-PC (421P100.000) (including DC precharge) POWERUNIT SR Control Card Digital Input REFU Elektronik GmbH2019-07-19

INSTALLATION MADE EASY The ConnectionBox and PowerUnit can be delivered individually in separate shipments. The ConnectionBox can be installed during cable work and the PowerUnit just before commissioning, thereby optimizing investment and project cash flow. This two-piece design also offers easiest serviceability – the PowerUnit can be quickly detached from the ConnectionBox for trouble shooting and measurements – without disconnecting the power cables on the DC or AC sides. Install and wire the ConnectionBox. Hang in PowerUnit before commissioning. No responsibility is taken for the correctness...