The Cinergia B2C+ ePlus series is a modular, bidirectional and fully regenerative DC test platform for research, development and industrial testing. It enables energy flow in both directions – as a precisely controllable source or active sink – and efficiently feeds excess energy back into the grid. With a power factor > 0.98 and a THDi < 3 %, it ensures clean grid operation with high energy efficiency.
Typical application fields include battery testing and emulation, PV source emulation, charging infrastructure testing, DC/DC and DC/AC converter development, energy storage systems, avionics, smart grid simulations and power-hardware-in-the-loop (P-HiL). The series covers outputs from 7.5 kW to 160 kW at standard voltages of 20 – 800 V DC and can be extended up to 1,500 V or over 1 MW system power via master/slave coupling.
Model in focus: B2C+20 (20 kW)
The B2C+20 is a compact and powerful model in the mid-range of the series. It offers an excellent combination of high current capability, efficiency and flexibility, making it ideal for development and test tasks where dynamic behavior, precise control and reliable power supply are required.
- Voltage range: 20 – 800 V DC
- Nominal power: 20 kW
- Current capability (3-channel, unipolar, 2Q): ±30 A per channel
- Current capability (1-channel, unipolar, 2Q): ±90 A total
- Current capability (bipolar, 4Q): ±30 A
- Operating modes: CV, CC, CP, CR, Power-Amplifier (P-HiL), Steps/Sequencer, Battery Pack Testing (incl.), optional battery & PV emulation
Technical classification compared to other models
With an output of 20 kW and a current capability of ±90 A, the B2C+20 is positioned as a balanced model between the compact laboratory version B2C+15 (±67.5 A) and the more powerful B2C+30 (±135 A). It offers sufficient reserves for applications with medium-sized battery stacks, inverter tests or grid simulation tasks where fast control and precise behavior are required.
Compared to the high-performance models (from B2C+40 upwards), the B2C+20 impresses with its smaller footprint, simpler integration and lower grid connection power - with the same functionality and software platform. Thanks to identical control behavior and master/slave compatibility, it can also be operated in larger system connections with other B2C+ units.
Product features of the series:
- Bidirectional & regenerative: Energy flow in both directions, backfeed into the grid to save energy.
- Grid-friendly: THDi < 3 % and power factor > 0.98 at rated output.
- Power portfolio: 13 models from 7.5 kW to 160 kW; standard 20 – 800 V DC.
- Overload capacity: up to 200 % short-term; 150 %/1 min, 125 %/10 min; DC overcurrent up to 110 % for 1 min.
- Multi-channel concept: 3 independent DC channels (2Q) or 1 channel with triple current capability; optional 4Q operation (bipolar).
- Parallel connection & series connection: Master/slave up to 8 units; parallel, series or series/parallel for more power or up to 1,500 V DC.
- Operating modes: CV, CC, CP, CR, power amplifier (P-HiL), steps/sequencer; battery pack testing included; optional battery and PV emulation.
- Fast dynamics: Step response typ. 1–2.5 ms (depending on mode and setpoint).
- Operation & software: 4.3" touch, Windows GUI with sequence editor, CSV import and data logging with 400 ms resolution.
- Interfaces: Ethernet/Modbus-TCP, isolated analog/digital I/Os; optional RS485, CAN/RS232 (via gateway); P-HiL integration possible.
- Safety: Emergency stop, interlock signals (input/output), configurable alarms/limits, comprehensive protection functions (OV/OC/OL, short circuit, watchdog, etc.).
- Efficiency & cooling: = 91 % (15–30 kW); forced air cooling for thermally stable continuous load.
- Measurement parameters: mains U/I/P/f; output U/I/P (rms/avg), DC link, temperature measurements; data logging via FTP.
- Standards & conformity: CE; safety EN-50178/EN-62040-1; EMC EN-62040-2; RoHS.
- Options: Battery emulation, PV emulation, insulation monitoring (IT grids), anti-islanding (grid-feeding), low-ripple capacitance, 30 kHz switching option (model-dependent).
