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PEM Electrolyzer Stack Assembly
PEM WATER ELECTROLYSIS STACKS · OEM & SYSTEM INTEGRATION

Custom PEM Water Electrolysis Stacks for OEM Hydrogen Systems

HELE supplies PEM electrolyzer stacks and stack modules for OEM hydrogen equipment, industrial electrolyzer systems, pilot projects and custom hydrogen-generation platforms. Stack configuration can be reviewed around hydrogen output, electrical duty, pressure, water conditions, interfaces and system-integration requirements.

Technology PEM Water Electrolysis
Supply Range Low-Flow · Compact · Medium · MW-Scale Stack Modules
Engineering Review Output · Current · Voltage · Pressure · Water · Interfaces
Project Support Custom Configuration · Testing · Documentation
View Stack Range
STACK ENGINEERING

PEM Stack Engineering for OEM Hydrogen Systems

A PEM water electrolysis stack is the electrochemical core of a hydrogen-generation system. Reliable OEM integration requires more than matching hydrogen output alone—the electrical duty, water conditions, pressure, thermal management, sealing and mechanical interfaces must work together as one stack design.

Electrochemical Duty

Hydrogen Output · Current · Voltage · Cell Configuration

Define the required hydrogen-production rate and electrical operating point so the stack configuration can be reviewed around the intended system duty.

Water & Thermal Conditions

Deionized Water · Conductivity · Temperature · Circulation

Feed-water quality, circulation method and operating temperature directly affect stack operation and should be confirmed before configuration.

Pressure & Sealing

Operating Pressure · Differential Pressure · Sealing Structure

Pressure requirements should be reviewed together with stack sealing, fluid routing and the downstream gas-handling system.

Integration Interfaces

Water Ports · Gas Ports · Electrical Terminals · Mounting

Mechanical, fluid and electrical interfaces should match the OEM equipment layout and balance-of-plant design.

PEM STACK RANGE

PEM Electrolyzer Stack Modules We Supply

HELE supplies PEM water electrolysis stack modules from micro-flow laboratory units to MW-scale industrial configurations. Reference models cover hydrogen output from 40 mL/min to the 50–300 Nm³/h product family, with final stack selection reviewed against hydrogen duty, electrical conditions, pressure, water quality and OEM integration requirements.

MW-Scale PEM Electrolyzer Stack

01 — MW-Scale PEM Electrolyzer Stack

Hydrogen Output: 50–300 Nm³/h H₂

Reference Models: 50 · 60 · 200 Nm³/h

Stack Format: High-capacity modular PEM stack

Best For: Large industrial hydrogen systems · Renewable hydrogen projects · Hydrogen stations · Process hydrogen equipment

High-capacity stack architecture for industrial hydrogen production. Designed for integration into large-scale PEM electrolyzer systems.

Medium-Scale PEM Electrolyzer Stack

02 — Medium-Scale PEM Electrolyzer Stack

Hydrogen Output: 1–10 Nm³/h H₂

Reference Models: 1 · 2 · 3 · 4 · 5 · 10 Nm³/h

Stack Format: Modular industrial PEM stack

Best For: OEM hydrogen generators · CHP / microgrid systems · Semiconductor equipment · Industrial hydrogen supply

Multiple cell-count and voltage configurations. Designed for OEM and skid-system integration.

Compact PEM Electrolyzer Stack

03 — Compact PEM Electrolyzer Stack

Hydrogen Output: 0.6 Nm³/h H₂

Reference Models: 0.6 Nm³/h

Stack Format: Compact integrated PEM stack module

Best For: Compact hydrogen generators · Laboratory systems · OEM hydrogen equipment · Pilot applications

Compact configuration for lower hydrogen-production duty. Suitable for equipment-level OEM integration.

High-Flow Compact PEM Stack

04 — High-Flow Compact PEM Stack

Hydrogen Output: 3200–5000 mL/min H₂

Reference Models: 3200 · 5000 mL/min

Stack Format: Compact plate-type PEM stack module

Best For: Compact hydrogen generators · Analytical systems · Laboratory hydrogen equipment · OEM devices

Higher-output configuration within the compact stack range. Designed for integration into compact hydrogen-generation equipment.

Mid-Flow Compact PEM Stack

05 — Mid-Flow Compact PEM Stack

Hydrogen Output: 1200–2000 mL/min H₂

Reference Models: 1200 · 2000 mL/min

Stack Format: Compact plate-type PEM stack module

Best For: Laboratory hydrogen systems · Analytical gas equipment · Compact OEM products · Research equipment

Compact design for medium low-flow hydrogen demand. Suitable for small hydrogen-generation and analytical systems.

Standard Compact PEM Stack

06 — Standard Compact PEM Stack

Hydrogen Output: 600–1000 mL/min H₂

Reference Models: 600 · 800 · 1000 mL/min

Stack Format: Compact low-flow PEM stack module

Best For: Laboratory equipment · Compact hydrogen generators · Research systems · OEM hydrogen devices

Multiple output options within a compact stack platform. Flexible integration into laboratory and OEM hydrogen equipment.

Low-Flow PEM Electrolyzer Stack

07 — Low-Flow PEM Electrolyzer Stack

Hydrogen Output: 300–450 mL/min H₂

Reference Models: 300 · 400 · 450 mL/min

Stack Format: Small-footprint PEM stack module

Best For: Analytical hydrogen supply · Laboratory equipment · Compact OEM hydrogen devices

Compact stack design for low-flow hydrogen generation. Suitable for analytical and small equipment applications.

Micro-Flow PEM Electrolyzer Stack

08 — Micro-Flow PEM Electrolyzer Stack

Hydrogen Output: 40–200 mL/min H₂

Reference Models: 40 · 60 · 100 · 150 · 200 mL/min

Stack Format: Ultra-compact PEM stack module

Best For: Research equipment · Analytical gas applications · Laboratory hydrogen supply · Compact OEM systems

Multiple micro-flow output configurations. Designed for very small hydrogen-generation equipment and laboratory integration.

Engineering Note:

The output ranges and reference models above represent the current PEM water electrolysis stack product family. Final stack configuration, electrical operating point, pressure capability, water conditions, interfaces, dimensions and test requirements should be confirmed against the selected model and OEM system requirements.

STACK SELECTION

How to Choose the Right PEM Stack

PEM stack selection should be based on the hydrogen duty, electrical operating point, pressure, water conditions and OEM integration requirements. Use the following parameters to identify the suitable stack range before detailed engineering review.

Need Help Selecting the Stack?

Share your hydrogen requirement, electrical conditions, operating pressure, water specification and equipment layout for engineering review.

Note: If the final stack parameters are not yet defined, send the available system specification or drawing and we can review the remaining inputs with you.

Selection Factor

01 — Hydrogen Requirement

What to Confirm Output · Nm³/h or mL/min · Operating Hours
Why It Matters Start with the required hydrogen-production rate and expected duty cycle. This determines the initial stack capacity range and reference model group.
Selection Factor

02 — Electrical Match

What to Confirm Current · Voltage · Available DC Power
Why It Matters The stack current and voltage range should match the available DC power supply and the required hydrogen-production duty.
Selection Factor

03 — Stack Configuration

What to Confirm Cell Count · Active Area · Size Constraints
Why It Matters Cell count, active area and stack dimensions should be reviewed against the required electrical operating point and available installation space.
Selection Factor

04 — Pressure & Temperature

What to Confirm Operating Pressure · Differential Pressure · Water Temp
Why It Matters Pressure and thermal conditions affect stack configuration, sealing requirements and integration with the downstream hydrogen system.
Selection Factor

05 — Water & Cooling

What to Confirm Water Quality · Conductivity · Circulation · Cooling
Why It Matters Confirm the available deionized-water quality, circulation method and thermal-management conditions before stack selection.
Selection Factor

06 — OEM Integration

What to Confirm Ports · Terminals · Mounting · Testing
Why It Matters Water and gas ports, electrical terminals, mounting interfaces and required test criteria should match the OEM equipment design.
CUSTOM STACK ENGINEERING

Custom PEM Stacks Engineered Around Your Hydrogen System

OEM hydrogen equipment often requires a stack configuration matched to the electrical architecture, hydrogen duty, water circuit, pressure level and available installation space. HELE can review project-specific PEM stack configurations around these interfaces.

Engineer reviewing PEM stack drawings

Cell Count & Stack Configuration

Cell Number · Active Area · Output Review stack architecture according to hydrogen duty, current and required operating voltage.

Current & Voltage Matching

DC Power · Current Density · Electrical Interface Match the electrical operating point to the OEM power supply and required stack performance.

Pressure & Sealing Design

Pressure · Gaskets · Compression · Fluid Isolation Review sealing and stack-compression requirements against the intended operating pressure.

Water & Thermal Management

Water Flow · Conductivity · Temperature · Cooling Define circulation and thermal requirements according to operating load and equipment layout.

Mechanical & Fluid Interfaces

Ports · Terminals · Mounting · Envelope Adapt the stack interface to the available OEM equipment space and BoP connection points.

OEM & Documentation

Drawing · Identification · Test Scope · Packaging Review project-specific drawings, testing, identification and packaging requirements.

WHAT WE NEED FROM YOU

  • Hydrogen output target
  • Rated power / voltage / current
  • Operating pressure
  • Water quality & cooling method
  • Stack dimensions or space limit
  • BOP interface or drawings
  • Operating hours / load profile
MANUFACTURING & QUALITY

PEM Stack Manufacturing, Assembly & Quality Control

PEM stack performance depends on the consistency of the membrane-electrode assembly, current collection, bipolar plates, sealing, compression and final stack integration. Project supply should therefore be reviewed from component preparation through assembly, inspection and release.

1

Membrane-Electrode Preparation

Electrochemical Core

Review membrane-electrode preparation and assembly requirements according to the approved stack configuration.

2

Current Collection & Bipolar Plates

Conductivity · Corrosion Resistance · Machining

Critical conductive components and flow-field structures should be controlled against the stack design and operating conditions.

3

Stack Assembly & Compression

Alignment · Compression · Cell Consistency

Assembly and compression should maintain consistent mechanical and electrochemical conditions across the stack.

4

Sealing & Interface Control

Pressure Integrity · Fluid Isolation · Ports

Sealing surfaces, connections and interfaces are reviewed against the selected stack design.

5

Inspection & Testing

Dimensional · Electrical · Fluid · Functional

Applicable inspection and test activities are performed according to the agreed project requirements.

6

Documentation & Traceability

Drawing · Inspection Record · Test Record · Identification

Available project documentation is confirmed according to the order and acceptance requirements.

Available Documents May Include:

Comprehensive documentation packages can be provided to support your engineering, integration, and factory acceptance testing (FAT) needs.

Datasheet
Stack drawing
Test report
Pressure / leak test record when required
Electrical performance record when required
Inspection record
Packing list
Project-specific documentation
FAT documentation when required
APPLICATIONS

PEM Electrolyzer Stack Applications

PEM stack selection should be matched to the hydrogen duty, electrical operating point, water circuit, pressure level and OEM system architecture.

OEM PEM Electrolyzer Systems

OEM PEM Electrolyzer Systems

Hydrogen Generator · Skid · Integrated System

PEM stack modules for integration into complete OEM water-electrolysis hydrogen-production equipment.

Renewable & Microgrid Hydrogen

Renewable & Microgrid Hydrogen

Solar · Wind · CHP · Distributed Energy

Stack configurations for hydrogen systems integrated with renewable or variable power sources.

Industrial On-Site Hydrogen

Industrial On-Site Hydrogen

Process Gas · Hydrogen Supply · Equipment Integration

PEM stacks for industrial equipment requiring on-site hydrogen generation.

Semiconductor & Process Equipment

Semiconductor & Process Equipment

Semiconductor · Laboratory Gas · Process Hydrogen

Stack modules for hydrogen-generation equipment used in controlled industrial and technical applications.

Research & Pilot Systems

Research & Pilot Systems

R&D · Pilot Plant · Test Platform

Compact and project-specific stacks for research, pilot and development systems.

Energy Storage & Power-to-Gas

Energy Storage & Power-to-Gas

Grid Balancing · Energy Storage · Synthetic Fuels

High-efficiency PEM electrolyzers for converting excess renewable energy into storable green hydrogen for grid stability.

PRODUCT BOUNDARY

PEM Electrolyzer Stack, Not a Fuel Cell Stack

This page covers PEM water electrolysis stack modules used to produce hydrogen from deionized water and DC power. It does not cover PEM fuel cell stacks.

FAQ

PEM Electrolyzer Stack FAQs

What is a PEM electrolyzer stack?
A PEM electrolyzer stack is the electrochemical core of a water-electrolysis hydrogen system. It combines multiple electrolysis cells to convert deionized water and DC electrical power into hydrogen and oxygen.
Is a PEM electrolyzer stack the same as a PEM fuel cell stack?
No. A PEM electrolyzer stack uses electrical power to split water and produce hydrogen, while a PEM fuel cell stack consumes hydrogen to generate electrical power. This page is specifically for PEM water electrolysis stacks.
What PEM stack output ranges are available?
The current catalog includes low-flow stack modules from tens of mL/min, compact configurations, 0.6 Nm³/h and 1–10 Nm³/h stacks, plus larger industrial reference models including 50, 60 and 200 Nm³/h H₂. Final availability should be confirmed against the required operating point and project configuration.
What information is needed to quote a custom PEM stack?
Provide the required hydrogen output, current and voltage, pressure, water conditions, cell or active-area requirements where known, interface details, available space, test requirements, annual volume and drawings.
Can PEM stack dimensions and interfaces be customized?
Project-specific stack geometry, interfaces, electrical connections and structural requirements can be reviewed according to the required hydrogen duty and OEM equipment layout. Final feasibility should be confirmed during engineering review.
What testing and documentation can be provided?
Available inspection and testing may include assembly review, applicable leak and pressure checks, electrical-performance data, operating-condition checks and agreed inspection records. Final test scope and documentation should be defined before order release.

Inside Our Manufacturing & Quality System

See how we assemble PEM stack modules, review sealing and interfaces, test stack performance, and document PEM stack projects for hydrogen system integration.

OEM integration environment
PEM STACK INQUIRY

Need a PEM Stack Built for Your Hydrogen System?

Tell us your hydrogen output, pressure, purity, footprint, interface, operating mode, or OEM integration requirements, and our team will recommend the right PEM stack solution.

  • Factory-Direct PEM Stack Manufacturing
  • Custom Cell Count, Active Area & Interface Support
  • Stack Test Records & Documentation Available

Prefer email? sales@heletitanium.com

We typically respond within 24 hours.