Power and feedwater
200–240 V AC single phase · Type II feedwater
Who it is for
A complete 2 kW system that produces hydrogen on site
HXB-V1 is the 2 kW electrolyzer as a complete system; if you only need the 2 kW stack for your own BoP, that is the HXS-2. Installation feasibility depends on power, water, ventilation, outlet piping and the boundary to purification, drying, compression and storage.
Choose this product when
- Sites using modest volumes of hydrogen continuously where delivery logistics are a burden
- Demonstration or research projects that use remote access to the computer running the desktop app for off-site monitoring and control
- Configurations that connect downstream to drying, storage and compression
HXB-V1
Using HXB-V1 as a research and pilot platform
Review stack replacement, operating controls and data access against your test plan.
- Can we run our own catalyst or MEA?
- The stack is removable, disassemblable and replaceable. Customer MEA compatibility and target operating points are reviewed before order. It is a 23-cell HXS-2; opening the cells and changing the MEA is in the HXS-2 handbook under Maintenance.
- How do we get the data out?
- The control app logs at 1 s and exports CSV. For a supervisory system use MQTT/JSON or Modbus TCP (PLC, SCADA). RTU and ASCII are not supported.
- What can we set ourselves?
- Voltage, current, electrolyte temperature and electrolyte flow. Operating current 15–67 A, 50 A recommended. Outlet pressure, 0 or 10 barg, is chosen at order.
- What protects the test?
- H₂ detection, interlocks and an electrolyte-tank pressure switch that stops the unit. The manual emergency stop is Emergency STOP in the control app; there is no separate button on the unit.
SITE CONNECTION
What HXB-V1 covers and what the site provides
HXB-V1 integrates the core functions needed to produce hydrogen. Storage, compression and end-use equipment are configured separately for the site.
HXB-V1
Integrated stack, power, circulation, controls and safety
Hydrogen drying
Not standard · modular product in development
Storage, compression and use
Downstream equipment for the site application
Included supply scope
- Integrated 2 kW stack, power supply, electrolyte circulation, temperature control, automatic water refill and safety logic
- Desktop control app and an MQTT over Ethernet (JSON) interface
- Dryer not included as standard · modular dryer in development · partner product can be recommended when needed immediately
- Dimensional data and an exterior/enclosure-only STEP model available for installation planning
Customer preparation
- 200–240 V AC single phase 50/60 Hz (total consumption approx. 2.4 kW)
- A feed-water tank, recommended quality ASTM D1193 Type II (1.0 µS/cm or below at 25 °C), maximum 30 µS/cm
- H₂ and O₂ outlet, vent and drain piping, plus use, storage or compression equipment
- An indoor 5–45 °C installation environment, ventilation and site hydrogen safety measures
Integrated operation
One unit covers the essential operating loop
Review the integrated hardware first. Open the software views only when you need the detailed daily workflow.
INTEGRATED
The 6U unit combines the core operating functions
- AEM stack and DC power
- Electrolyte circulation and temperature control
- Automatic water refill and operating sensors
- Control and safety logic
Open the operating software views3 views
OPERATIONS SOFTWARE
The daily operating loop in three views
Monitor the system, inspect the process state and define an operating protocol. Additional software views are available during a technical review.
Customers
HXB-V1 in customer projects
These records describe the selection purpose and application context, not customer-verified performance.
HXB-V1
Before you ask for a quote
Review supply scope, installation needs and commercial terms. Share your output, purity and pressure requirements so we can prepare a suitable configuration and quotation.
- Included and not included
- Included: the unit (stack, circulation pump, power supply and controller built in), control app, handbook, CE Declaration of Conformity, 12-month warranty. Not included: water treatment, hydrogen dryer, compressor, storage, site piping, installation work, control PC.
- Purity and dryer
- 99 % without a dryer (10 barg, water-saturated). ≥ 99.999 % with a dryer. Our own dryer HXD-V1 is scheduled for Q4 2026 and taken on pre-order; if you need drying now, give us the dew point, flow and pressure and we quote a configuration. Applications that accept 99 %, such as combustion and some process use, can be supplied now.
- Pressure
- Choose 0 or 10 barg at order; we fit the matching relief valve before shipment. A 10 barg unit always builds up to 10 barg in operation. 35 barg is under verification and supplied by agreement.
- Feed water and electrolyte
- Deionised water ≤ 1.0 µS/cm recommended, up to 30 µS/cm in service. Consumption 0.55 L/h (50 A, 60 °C). We recommend sourcing water treatment locally and send a recommended specification on request. Electrolyte KOH 0.1–1 M (0.1 M recommended, about 5 L initial fill) is supplied by the customer.
- Delivery terms and shipping
- EXW Hwaseong, Korea. Crated and handed to a freight forwarder. Freight on the quotation is an estimate; DAP and DDP are quoted on request. Duties, VAT and local certification costs are borne by the importer.
- Payment, lead time, validity
- T/T 100 % in advance: proforma invoice, production starts on receipt of funds, shipment 8 weeks later. USD by default, EUR invoicing available. Quotations are valid 30 days. Units are built to order; we keep no demo stock.
- Warranty and support
- 12 months from shipment (from acceptance where an acceptance procedure applies; consumables excluded), return-to-base. Support runs installation, start-up and maintenance training in Korea, then remote support during operation, then return-to-base repair. An MEA replacement service is available.
- Certification and track record
- The CE Declaration of Conformity can be downloaded from the handbook. There is no UL/NRTL listing, so check local inspection requirements for North American sites. Operating evidence and test conditions are provided in the specifications and related technical resources.
- Price
- Depends on quantity, configuration and Incoterms, so it is issued as a quotation. Include output, purity and pressure so we can review configuration and supply terms.
This is a summary of standard supply terms. Configuration, lead time and commercial terms are confirmed in your quotation.
Request a quotationSpecifications
HXB-V1 specifications and supply terms
The specification table, support terms and review documents.
Production performance5 items
| H₂ production | 500 L/h (approx. 1 kg/day) |
|---|---|
| Energy use (kW) | 2.4 kW (BOL · 2.0 stack + 0.4 BoP) |
| Energy use (kWh/Nm³) | 4.8 (BOL) |
| Energy use (kWh/kg-H₂) | Stack 44 · system 54 (the difference, about 10 kWh/kg, is the BoP) |
| Operating current | 15–67 A (50 A recommended) |
Hydrogen purity & pressure3 items
| H₂ purity @ 0 barg | 98–99% (no dryer) · ≥ 99.999% (with dryer) |
|---|---|
| H₂ purity @ 10 barg | 99% (no dryer) · ≥ 99.999% (with dryer) |
| H₂ pressure | 0 or 10 barg · chosen at order (relief valve); 35 barg by agreement |
Power & water5 items
| Power supply | 200–240 V AC · 50/60 Hz · single phase |
|---|---|
| Water conductivity | Recommended ASTM D1193 Type II (≤1.0 µS/cm) · in-service ≤30 µS/cm |
| Water consumption | 0.55 L/h (50 A · 60 °C) |
| Feed water top-up | Built-in gear pump refills automatically |
| Electrolyte | KOH 0.1–1 M · circulation 2–5 L/min |
Installation7 items
| Ambient temp | 5–45 °C |
|---|---|
| IP rating | IP 20 |
| Dimensions | 482 × 647 × 266 mm (6U) |
| Weight | 51.3 kg |
| Fluid connections | H₂O · H₂ · O₂ · VENT · DRAIN 1/4″ double-ferrule |
| Power inlet | C20 AC inlet (C19 cable) |
| Installation clearance | Front ≥ 300 mm · rear ≥ 400 mm |
Controls & communications4 items
| Control | Desktop app (MQTT/Ethernet) |
|---|---|
| Direct control | Voltage · current · electrolyte temperature · electrolyte flow |
| Stack handling | Removable · disassemblable · replaceable |
| Telemetry | 1 s interval · 8 external control variables · Modbus TCP supported (not RTU) |
Safety & warranty2 items
| Safety | H₂ detection · emergency stop (control app) · interlocks · electrolyte tank pressure switch auto-stop |
|---|---|
| Warranty | 12 months from shipment, or from acceptance where an acceptance procedure applies (consumables excluded) |
How to cite in a paper1 item
Use the line below in the Methods section when reporting the material source.
AEM water electrolysis system, 2 kW, 500 L/h (HXB-V1, HydroXpand Inc., Republic of Korea)- Specification
- 19-inch 6U rack with the 23-cell HXS-2 stack, 0 or 10 barg outlet
- Test condition
- 0.1 M KOH, 50 °C
Ask [email protected] if the lot number is required.
Support, lead time and commercial terms3 items
Support & warranty
One-year warranty under standard operating conditions. Routine checks cover feedwater, leaks and operating data; KOH is replaced by condition rather than on a fixed interval. A returned stack can be refurbished by replacing only the MEA and reusing the hardware.
Lead time & status
Available · 8 weeks from PO acceptance
Commercial terms & origin
EXW basis; DAP and other terms by agreement. Country of origin is the Republic of Korea, with certificate of origin provided.
Pricing depends on quantity and Incoterms, so it is issued as a quotation. Before asking for one, compare five years of buying cylinders against making the same hydrogen on site.
Cost vs cylinders calculatorBefore you order
HXB-V1: questions before you order
Minimum order, lead time, formats and how pricing works. The full FAQ covers operating and integration questions.
How do I buy the HXB-V1?
HydroXpand sells it directly. Send the hydrogen flow you need, operating hours, outlet pressure (0 or 10 barg) and the installation site through the enquiry form or to [email protected]; we return a quotation with price, lead time and Incoterms, and the lead time counts from the day we accept your purchase order.
What are the lead time and the warranty?
It ships eight weeks from PO acceptance. The warranty is one year under standard operating conditions, counted from the ship date or, where an acceptance procedure applies, from the acceptance date.
What power supply does it need, and how much hydrogen does it make?
It runs on 200–240 V AC single-phase 50/60 Hz and draws about 2.4 kW in total. Hydrogen output is 500 L/h (0.5 Nm³/h, 1 kg/day) and system energy consumption including BoP is 54 kWh per kg of hydrogen.
Is a dryer included, and what purity do I get?
The standard configuration does not include a dryer. Without one the outlet hydrogen is 98–99% at ambient pressure and 99% at 10 barg; with a dryer we have verified ≥ 99.999% under our test conditions. Our modular dryer HXD-V1 is taking pre-orders, and until then we source a dryer matched to your conditions.
How much does it cost?
Price depends on quantity, configuration (outlet pressure, dryer) and Incoterms, so it is issued as a quotation. As a 19-inch rack unit it scales by adding units: five stacked units make a 10 kW class system of about 5 kg per day.
What certification and control interfaces does it have?
HXB-V1 carries a manufacturer's EU Declaration of Conformity and CE marking (LVD, EMC, RoHS; a self-declaration, not third-party certification). Control is Ethernet MQTT with JSON payloads, and PLC or SCADA systems connect over Modbus TCP.
What are the commercial terms and the country of origin?
EXW is the base term and other Incoterms such as DAP are available. The country of origin is the Republic of Korea; a certificate of origin is provided, so FTA preference may apply in countries that have an FTA with Korea.