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The Airdra25 offers bi-directional power conversion from any type of fuel cell to the AC power grid. It can operate grid-connected as well as stand-alone, creating a local micro-grid. With its 19” form factor and galvanic isolation, multiple Airdra25s can be easily paralleled, interfacing fuel cells up to 500kW. The module offers high efficiency (up to 96%) and is air-cooled with a low-noise speed-controlled fan tray. The module complies with the latest international Grid codes (E.g. RfG, IEEE1547) and can be accessed via a standardized Sunspec Modbus Ethernet interface.
Key features include:
Versatility
The Airdra25 is a universal power converter that can be used to interface with different types of fuel cells including regenerative ones. Due to its bi-directional capabilities, it can also be used to connect batteries or electrolysis stacks to the grid. The Airdra25 can operate grid-connected as well as in a stand-alone configuration. As it complies with the latest grid code standards, it is fully prepared for the future grid with a high penetration of renewable energy sources. Its galvanic isolation offers the possibility of flexible grounding and easy paralleling, up to 500kW.
The SunSpec Modbus ethernet interface facilitates control and monitoring of the Airdra25. A separated Master/Slave interface is available to guarantee even power distribution and stable operation for almost unlimited paralleling of modules.
Reliability
The Airdra25 module is designed as fully PCB-based and almost completely produced on automated production lines with in-line automated quality control and tests, therefore eliminating the risk of human error. The unit is fully SiC-based, resulting in high efficiency and low thermal stress over a lifetime. The fans are speed-controlled, increasing bearing lifetime. If necessary the fan tray can be replaced separately.
| DC side | Fuel-cell, Electrolysis, Battery |
| AC side | Grid connected, Stand-alone |
| Supported AC grid types | 3Ph with and w/o neutral |
| Paralleling | Up to 6, AC and DC side |
| Power flow | Bi-directional |
| Fuel cell voltage | 100 – 240Vdc, ±200Adc |
| Grid voltage 3Ph | 380 – 480Vac, 40Arms |
| Grid frequency | 50/60Hz |
| Active Power | ±25kW continuous |
| Reactive Power | 25kVAr (lagging and leading) |
| Efficiency | Up to 96% |
| Ambient temperature | -25 to +45°C |
| Environment | Indoor industrial usage |
| Certifications | UL, CE |
| DC and AC side | PowerCombicon35 connectors |
| Auxiliary supply | 24V supply or battery |
| Monitoring & control | SunSpec Modbus ethernet |
| Master/slave interface | RS-422 |
| Enclosure | 19” Rack unit |
| Height | 5U |
| Depth | 650mm |
| Air cooling | Front to back, speed controlled |
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