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Hydra is the next generation of rectifiers for electrolyzers based on SiC MOSFET topology. Compared to traditional IGBT or thyristor rectifiers, Hydra brings higher efficiency across the entire load, fast response times, smaller footprint due to lower losses and reducing components required for compensation as well as superior grid and stack compatibility.
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Hydra brings high euro efficiency of 98.6% (peak efficiency up to 98.7%) due to its SiC MOSFET topology which is capable of operating at higher switching frequencies compared to other rectifiers. The faster switching capabilities enables the design of smaller passive components such as inductors and capacitors, which reduces both system size and weight while maintaining high efficiency. Additionally, lower conduction losses in the system reduces the need for large heatsinks and minimize power wastage as heat improves the overall efficiency.
*Note: EURO efficiency represents the weighted average of the converter efficiency across the power output range. The modular design allows for adjustable rack sizes, which can be cascaded to meet varying power requirements.
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Max. output power |
6.0MW (24 x 250kW HyPE modules) |
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Input AC voltage |
800Vac |
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Output DC voltage range |
0 – 1500Vdc |
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Output DC current range |
0 – 9600Adc |
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Peak efficiency |
98.7% |
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Euro efficiency |
98.6% |
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Racks combined power |
Up to 24MW |
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EMC filter |
Included, input and output (CISPR 11) |
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Low THDi |
<1% |
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External harmonic filter |
Not required |
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PF compensation bank |
Not required |
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Functional safety |
AC disconnect SIL 2 (SIL 3 optional) |
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Certification / safety standards |
IEC 62477-1 |
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Converters |
Module-based active rectifier & active choppers |
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Topology |
Multilevel, high frequency SiC-based |
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Dimensions (WxDxH) |
1800 x 2000 x 2300, 4000kg |
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Small footprint |
1.7MW per m² |
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Control interface |
Modbus TCP/IP |
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Multiple outputs |
Optional |
250kW HyPE module
Hydra is a liquid-cooled rack system built with 250 kW HyPE (Hydra Power Electronics) modules. Each Hydra unit supports up to 24 modules, delivering up to 6 MW. Its modular design enables quick module replacement, minimizes downtime, and allows flexible scaling to match power requirements. Multiple Hydra rectifiers can be combined to support stack sizes of up to 24 MW (EOL). Hydra remains operational if a HyPE module fails, eliminating single-point failures and allowing continued operation at full or reduced power until replacement.
Individual modules can also be adjusted to deliver multiple outputs to serve multiple electrolyzers per system. This allows customers to have individual control on multiple electrolyzers optimizing the overall electrolyzer performance.