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Rely

Clear100+

Clear100⁺ new generation green hydrogen configurable productized plant

HydrogenAlkaline electrolyserModelled
Clear100+ by Rely
Nominal power
100MW
Specific energy
51.17kWh/kg
H2 output
20000Nm3/h
H2 output pressure
15bar

Characteristics

6 of 9 fields · all sourced · retrieved 2026-09-27
Nominal power
100MW
Specific energy
51.17kWh/kg
H2 output
20000Nm3/h
H2 output pressure
15bar
H2 purity
99.999%
Minimum turndown
15%

Clear100⁺ is a productized yet configurable 100 MW green hydrogen plant from Rely, the joint venture formed in 2023 by Technip Energies and John Cockerill. It pairs John Cockerill Hydrogen pressurized alkaline electrolyzer stacks (20 × 5 MW) with a process treatment unit, arranged as replicable 20 MW blocks with mutualized purification, transformers and rectifiers, and designed for maximum preassembly. Rely states a core product footprint of 7,500 m², plant efficiency of 51.7–53.7 kWh/kg with the John Cockerill P-series line, 96% plant availability including planned maintenance, a 15%–100% operating range, a 25-year design life and operation from -20 °C to +40 °C. The company quotes a pre-FID lead time within 5 months and an EPC schedule of 29 to 31 months, and sells the plant with performance guarantees on efficiency, production capacity and purity. The new generation released in 2025 adds increased mutualization for a further 15% reduction in process equipment, 100 MW+ output delivered via 20 MW units, a choice of Performance or Standard series stacks and improved prefabrication.

Manufacturer datasheet (27)

Start-up time (after stand-by)
<15 minutes
Plant availability
96% (included planned maintenance)
Plant design life
25 years
Installed footprint - core product
7,500m2
Installed footprint - balance of site
13,000-14,000m2
Sound pressure level
85 dBA (at 1 meter from equipment)
Ambient temperature
-20°C to +40°C (wider temperature range optional)
Compliance standards
ISO22734:2019, IEC, NFPA-2, ASME, European Directives
Certifications
Certified to ASME, CE, and ISO standards
Electrolyzer technology
John Cockerill Hydrogen pressurized alkaline electrolyzers
Electrolyzer stack configuration
20 x 5MW
Stack housing
2 buildings with compact footprint
Modular block design
Replicable 20MW block design ensures seamless scalability
Purification unit
Mutualized purification unit for 100MW
Gas separation and cooling
Gas separators and coolers sized for 20MW
Power conversion
Mutualized transformers and rectifier for 20MW
Control system
Unique centralized control system for low manning operations
Energy management system
Whole-plant Energy Management System
Pre-FID lead time
Within 5 months
EPC lead time
29 to 31 months
Process equipment reduction (new generation)
additional 15% reduction in process equipment
Equipment count vs. conventional integration
40% less equipment thanks to unmatched integration approach
Safety design basis
Built on Safety by Design principles, meeting all HSE standards
Prefabrication approach
Containerized and skidding approach for faster, more derisked lead times
Digital twin
Digital twin ready for advanced configuration and optimization
New generation release
released 2025
Initial launch
June 2024