Large Capacity Alkaline Electrolyzer Alkaline Water Electrolysis Hydrogen Generation Systems

Hyvoda self-developed Alkaline Electrolyzer provides hydrogen output ranging from 1 to 2000 Nm³/h. Proven alkaline water electrolysis technology adapts to stable grid power and mild fluctuating new energy, supporting global green hydrogen infrastructure construction.

Features

Built on mature Alkaline Electrolyzer alkaline water electrolysis technology
Six capacity grades cover 1 to 2000 Nm³/h hydrogen production demand
20%-110% wide load adjustment adapts to variable power conditions
Hydrogen purity above 99.999%, dew point lower than -70℃ stably
0.1~1.6MPa adjustable outlet pressure connects compressors directly
DC power consumption controlled ≤4.3 kWh per cubic meter hydrogen
Electrolysis stack overhaul cycle reaches no less than 10 years
Continuous stable operation designed for long-term industrial scenarios

Applications

Global construction of centralized renewable hydrogen production plants
Front-end gas source supply for hydrogen fuel stations worldwide
Raw hydrogen supply for chemical, metallurgy decarbonization industries
New energy storage matched with Wind Solar Hybrid System power bases
Gas supply support for commercial Fuel Cell Power Plants operation
Implementation of global industrial comprehensive decarbonization plans
Large-scale clean energy storage construction for new energy projects

Working Principle

Every Alkaline Electrolyzer adopts alkaline water electrolysis as the core reaction principle to split pure water into hydrogen and oxygen. The electrolytic cell is filled with potassium hydroxide alkaline electrolyte, which greatly improves the conduction efficiency of ions inside the system. After DC power is applied to the positive and negative electrodes, water molecules decompose: hydrogen gathers at the cathode, while oxygen generates at the anode. A dedicated porous diaphragm separates the two gases thoroughly to prevent gas mixing and eliminate potential safety hazards during continuous operation.

Different from pem hydrogen generator adopting proton exchange membrane route, Alkaline Electrolyzer does not rely on expensive polymer membrane materials. Its metal electrode components feature outstanding long-term durability, which makes it more suitable for uninterrupted year-round operation of hydrogen production plants. The system maintains a constant operating temperature of 85±5℃. This temperature range balances electrolysis efficiency and electrolyte stability, controlling DC energy consumption steadily below 4.3 kWh per cubic meter of hydrogen.

Hydrogen produced by the system reaches purity higher than 99.999% with dew point ≤ -70℃. The outlet pressure can be adjusted between 0.1–1.6 MPa, which can be directly connected with Hydrogen Compressor including Diaphragm Hydrogen Compressor and Reciprocating Hydrogen Compressor for pressurized storage and transportation. The equipment supports 20%–110% flexible load adjustment. When matched with Wind Solar Hybrid System, surplus intermittent power can be converted into Renewable Hydrogen to realize Clean Energy Storage Solutions, pushing forward the progress of Industrial Decarbonization for enterprises worldwide.

The whole production process only consumes deionized water and electric energy, without any carbon-containing byproducts, fully complying with the construction standards of green hydrogen plant and hydrogen power plant.

Distinction Among Five Capacity Specifications

All specifications belong to unified Alkaline Electrolyzer technical platform, sharing consistent hydrogen purity, outlet pressure, energy consumption index and overhaul cycle. The main differences lie in hydrogen output scale, electrolytic stack size, electrical configuration and applicable project scenarios:

1 ~ 10 Nm³/h Small-Scale Units

Entry-level industrial Alkaline Electrolyzer products. Compact electrolytic stack with small overall volume and light weight, low rated voltage and current. Suitable for on-site hydrogen supply of small processing factories, bench testing of Fuel Cell Power Plants and small renewable hydrogen demonstration stations.
200 Nm³/h Medium-Large Standard Unit

Entry model for large-scale centralized hydrogen production. The electrolytic stack expands in size, with upgraded electrical parameters. Widely used in park-level green hydrogen projects, capable of single-unit operation or multi-unit parallel capacity expansion.
500 Nm³/h Commercial Large Unit

The mainstream specification for global industrial decarbonization projects. Balanced equipment investment and hydrogen production efficiency, the preferred option for new energy power station supporting energy storage and medium-sized Green Hydrogen Production Plant construction.
1000 Nm³/h Power Station-Grade Large Unit

Ultra-large single-stack hydrogen production equipment, equipped with high-current power distribution system. Mainly deployed in onshore wind & photovoltaic bases for centralized hydrogen preparation, undertaking medium-sized hydrogen power plant construction tasks.
2000 Nm³/h Flagship Ultra-Large Unit

Maximum-capacity Alkaline Electrolyzer within the product line. Oversized electrolytic stack and supporting auxiliary system, customized for gigawatt-level new energy bases. Mostly delivered as complete packages by Renewable Energy EPC Contractor for large-scale green hydrogen solutions.

Unified General Technical Parameters for All Models

Hydrogen flow adjustable range: 20% ~ 110% of nominal flow
Hydrogen purity: ＞99.999%, hydrogen dew point: ≤ -70℃
Hydrogen outlet pressure: 0.1 MPa ~ 1.6 MPa adjustable
Standard operating temperature: 85 ± 5 ℃
Direct current energy consumption: ≤ 4.3 kWh/Nm³ H₂
Electrolytic stack recommended overhaul period: ≥ 10 years
Core technology: Alkaline Electrolyzer alkaline water electrolysis

Technical Specifications

1. 1 ~ 10 Nm³/h Hydrogen Generation System

Item	Unit	1 Nm³/h	10 Nm³/h
Nominal Hydrogen Flow	Nm³/h	1	10
Hydrogen Flow Adjustment Range	%	20 ~ 110	20 ~ 110
Hydrogen Purity	%	99.999	99.999
Hydrogen Dew Point	℃	-70	-70
Hydrogen Outlet Pressure	MPa	0.1 ~ 1.6	0.1 ~ 1.6
Operating Temperature	℃	85±5	85±5
Rated DC Voltage	V	27	83
Rated DC Current	A	120	582
DC Power Consumption	kWh/Nm³	≤ 4.3	≤ 4.3
Electrolyzer Stack Dimension (L × W × H)	m	0.186 × 0.3 × 0.3	0.565 × 0.516 × 0.548
Electrolyzer Stack Weight	kg	82	420
Recommended Electrolyzer Overhaul Cycle	Year	10	10

2. 200 Nm³/h Hydrogen Generation System

Item	Unit	Technical Data
Nominal Hydrogen Flow	Nm³/h	200
Hydrogen Flow Adjustment Range	%	20 ~ 110
Hydrogen Purity	%	＞99.999
Hydrogen Dew Point	℃	≤ -70
Hydrogen Outlet Pressure	MPa	0.1 ~ 1.6
Operating Temperature	℃	85±5
Rated DC Voltage	V	240
Rated DC Current	A	5000
DC Power Consumption	kWh/Nm³	≤ 4.3
Electrolyzer Stack Dimension (L × W × H)	m	1.28 × 1.35 × 1.6
Recommended Electrolyzer Overhaul Cycle	Year	≥ 10

3. 500 Nm³/h Hydrogen Generation System

Item	Unit	Technical Data
Nominal Hydrogen Flow	Nm³/h	500
Hydrogen Flow Adjustment Range	%	20 ~ 110
Hydrogen Purity	%	＞99.999
Hydrogen Dew Point	℃	≤ -70
Hydrogen Outlet Pressure	MPa	0.1 ~ 1.6
Operating Temperature	℃	85±5
Rated DC Voltage	V	265
Rated DC Current	A	9000
DC Power Consumption	kWh/Nm³	≤ 4.3
Electrolyzer Stack Dimension (L × W × H)	m	1.74 × 1.96 × 2.3
Recommended Electrolyzer Overhaul Cycle	Year	≥ 10

4. 1000 Nm³/h Hydrogen Generation System

Item	Unit	Technical Data
Nominal Hydrogen Flow	Nm³/h	1000
Hydrogen Flow Adjustment Range	%	20 ~ 110
Hydrogen Purity	%	＞99.999
Hydrogen Dew Point	℃	≤ -70
Hydrogen Outlet Pressure	MPa	0.1 ~ 1.6
Operating Temperature	℃	85±5
Rated DC Voltage	V	530
Rated DC Current	A	9000
DC Power Consumption	kWh/Nm³	≤ 4.3
Electrolyzer Stack Dimension (L × W × H)	m	3.6 × 1.96 × 2.3
Recommended Electrolyzer Overhaul Cycle	Year	≥ 10

5. 2000 Nm³/h Hydrogen Generation System

Item	Unit	Technical Data
Nominal Hydrogen Flow	Nm³/h	2000
Hydrogen Flow Adjustment Range	%	20 ~ 110
Hydrogen Purity	%	＞99.999
Hydrogen Dew Point	℃	≤ -70
Hydrogen Outlet Pressure	MPa	0.1 ~ 1.6
Operating Temperature	℃	85±5
Rated DC Voltage	V	688
Rated DC Current	A	13800
DC Power Consumption	kWh/Nm³	≤ 4.3
Electrolyzer Stack Dimension (L × W × H)	m	4.7 × 2.2 × 2.6
Recommended Electrolyzer Overhaul Cycle	Year	≥ 10

FAQ

What are the key differences between large Alkaline Electrolyzer equipment and HVDA/HVDB/HVDB1/HVDC small desktop pem hydrogen generator?

Technical route: Adopt Alkaline Electrolyzer alkaline electrolysis; desktop devices belong to PEM proton exchange membrane electrolysis.
Production capacity: Alkaline units produce 1~2000Nm³/h for industrial large projects; desktop models only output trace hydrogen for laboratory analytical instruments.
Operation mode: Alkaline equipment supports years of uninterrupted continuous running; small PEM machines are designed for intermittent short-time use.
Pressure performance: Alkaline systems own 1.6MPa maximum outlet pressure for compression storage; desktop devices have low pressure limit without large-scale storage capacity.
Power adaptation: Alkaline Electrolyzer fits steady high-power grid and mild fluctuating new energy power; desktop equipment only adapts to household stable mains electricity.

Can hydrogen produced by Alkaline Electrolyzer be directly connected with Hydrogen Compressor for high-pressure storage?

Yes. The adjustable outlet pressure range 0.1~1.6MPa can be directly matched with Reciprocating Hydrogen Compressor and Diaphragm Hydrogen Compressor to complete secondary pressurization and tank storage without extra pre-pressurizing equipment.

Compared with Methanol Reforming Hydrogen Generator, what are the advantages of Alkaline Electrolyzer?

Alkaline Electrolyzer generates hydrogen via water electrolysis with nearly zero carbon emissions, fitting strict Industrial Decarbonization requirements. Methanol reforming consumes fossil-derived methanol and discharges CO₂ byproducts, limited in low-carbon projects.

Is parallel operation of multiple identical Alkaline Electrolyzer units available for capacity expansion?

All specifications support modular parallel layout. Users can add equipment step by step according to project progress, widely used in phased construction of green hydrogen plant and new energy power stations.

Can the system work normally with power generated by Wind Solar Hybrid System?

The wide load adjustment capability can cope with mild power fluctuation of wind and photovoltaic power. Surplus electricity is converted into Renewable Hydrogen to realize Clean Energy Storage Solutions and new energy consumption.

Why can Alkaline Electrolyzer maintain long service life for industrial scenarios?

Its electrode and diaphragm structural design resists corrosion of alkaline electrolyte effectively. The whole system operates under constant temperature, slowing component aging and ensuring the electrolytic stack overhaul cycle exceeds 10 years.