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Frequently Asked Questions

How much energy is consumed per kilogram of H2?

Typical alkaline and PEM electrolyzers consume 50–60 kWh of electricity per kg of hydrogen (higher-heating-value basis), corresponding to roughly 60–70% efficiency. HyZenis electrolyzers can achieve 4.0 kWh/Nm³ (equivalent 44.5 kWh/kg) and specialize down to 4.2 kWh/Nm³ (equivalent 46.7 kWh/kg) in large-scale designs.

Which international standards apply to electrolyzer systems?

Electrolysis systems are typically carried the CE mark in Europe; in North America, look for ANSI/CSA B22734 (equivalent to ISO 22734) or an ASME stamp on pressure parts. Manufacturers should also be ISO 9001 (quality) and ISO 14001 (environment) certified.

What site infrastructure is needed?
Typical requirements include deionized water treatment, AC power with suitable grounding, communications/network interfaces, and safe routing for H₂ and O₂ piping. Installation must follow local codes (e.g., NFPA 2 in the U.S.) and manufacturer guidelines.
What return on investment should I anticipate?
At HyZenis, we design our electrolysis systems with our customers’ needs at the forefront, ensuring each solution delivers a strong return on investment. Actual ROI figures vary by application—please reach out to HyZenis team for detailed information.

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