10 Electrolyzer Manufacturers Worldwide in 2026

Electrolyzers are critical for green hydrogen production, splitting water into hydrogen and oxygen via electricity from renewables. As of early 2026, the global market is dominated by alkaline (AWE) and proton exchange membrane (PEM) technologies, with anion exchange membrane (AEM) and solid oxide electrolysis cells (SOEC) emerging. Key efficiencies (based on higher heating value, HHV, system level) vary: AWE (~65-75%, mature and cost-effective for large-scale), PEM (~60-70%, high purity and flexible), SOEC (~80-90% with heat input, efficient but high-temp), AEM (~60-70%, low-cost hybrid). Global manufacturing capacity reached ~33 GW/year by 2025, projected to hit 50+ GW by 2030, with China leading at ~25 GW. Below are the top 10 manufacturers, ranked by installed/projected capacity, market presence, and BloombergNEF/industry rankings as of 2025. Each includes primary technology, efficiency range, production capacity (where reported), and other notes like location and key strengths.

1. Thyssenkrupp Nucera (Germany) Technology: Primarily AWE (pressurized alkaline). Efficiency: 70-75% (system). Capacity: ~3 GW under execution; annual manufacturing ~1-2 GW. Other: Leader in large-scale projects (e.g., 1 GW NEOM delivery); focuses on industrial decarbonization; market cap emphasis on scalability and low capex.

2. LONGi Hydrogen (China) Technology: AWE and PEM. Efficiency: 65-75% (AWE), 60-70% (PEM). Capacity: ~2 GW annual; part of China's 25 GW national lead. Other: Integrated with solar tech; low-cost production; won awards for pilot projects; strong in Asia export.

3. Nel ASA (Norway) Technology: PEM and AWE. Efficiency: 60-70% (PEM), 65-75% (AWE). Capacity: ~1 GW annual; recent orders ~500 MW. Other: Focus on stack tech; US subsidiary for PEM; versatile for Power-to-X; established since 1927.

4. ITM Power (UK) Technology: PEM. Efficiency: 60-70%. Capacity: ~500 MW annual; gigafactory scaling. Other: High-purity H₂; rapid response to renewables; partnerships in EU/UK; emphasis on modularity.

5. Plug Power (USA) Technology: PEM. Efficiency: 60-70%. Capacity: ~1 GW annual; vertically integrated. Other: End-to-end H₂ solutions; fuel cells synergy; major US player; focuses on logistics/transport.

6. Cummins (Accelyon) (USA) Technology: PEM and AWE. Efficiency: 60-70% (PEM), 65-75% (AWE). Capacity: ~500 MW annual; expanding factories. Other: Acquired HyLYZER; industrial engines background; cost-competitive; North America focus.

7. McPhy Energy (France) Technology: AWE and PEM. Efficiency: 65-75% (AWE), 60-70% (PEM). Capacity: ~300 MW annual; recent acquisitions. Other: Pressurized systems; EU incentives; hybrid tech; acquired by John Cockerill in 2025.

8. Bloom Energy (USA) Technology: SOEC (high-temp). Efficiency: 80-90% (with heat). Capacity: ~500 MW annual; SOFC reversal. Other: Reversible fuel cells; waste heat utilization; industrial hubs; emerging leader in SOEC.

9. John Cockerill Hydrogen (Belgium) Technology: AWE (pressurized). Efficiency: 70-75%. Capacity: ~1 GW annual post-acquisitions. Other: Gigawatt-scale ambitions; EU partnership; low capex; acquired McPhy assets in 2025.

10. Siemens Energy (Germany) Technology: PEM. Efficiency: 60-70%. Capacity: ~500 MW annual; integrated with renewables. Other: Silyzer line; grid-scale; collaborations (e.g., BASF); strong in energy systems.

These rankings reflect 2025 data, with overcapacity issues in the West vs. China's dominance. Challenges include high costs (~$300-500/kW target by 2030) and supply chain bottlenecks, but incentives like EU's 17.5 GW goal and US IRA drive growth.

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