Enapter Handbook

# Electrolyser 2.1 Rev A. (EL 2.1 Rev A.)

Warning

The Electrolyser 2.1 Rev A. (EL 2.1 Rev A.) is no longer available for purchase.
Electrolysers 4.1 is the latest available model.

Note

Find all details about service and support management for EL 2.1 units in this document (opens new window).

Enapter's patented anion exchange membrane (AEM) electrolyser is a standardized, stackable and flexible system to produce on-site hydrogen. Modular design paired with advanced software integration enables set up in minutes and remote control and management. Stack this electrolyser to achieve the required hydrogen flow rate.

# 📖 Resources

Rev. Availability Datasheets Owner's Manuals Quick Start Guides Battery Limits CAD Drawings Cooling Power Supply Narrow Body Certification
EL 2.1 Rev A. Certified EN / RU EN / RU EN EN 3D STP
3D IGS		 Air cooled AC No CE Certificate (EN)
CE Certificate (DE)
EL 2.1 LC EN EN 3D STP
3D IGS		 Liquid cooled
EL 2.1 NB DC Prototype EN EN 3D STP
3D IGS		 Air cooled DC Yes

# 📸 Images

Front Right Side Left Side Isometric
EL 2.1 Rev A. Download Download Download Download
EL 2.1 Rev A.
Narrow Body		 Download Download Download
EL 2.1 Rev A.
Direct Current		 Download Download

# 🚀 First Start

  • Make sure all pipes and wires are connected.

    • You should follow the Enapter EL 2.1 Owner's manual on electrical and piping connections, operation, transportation, storage and disposal steps.
    • Insert two supplied jumpers into the Dry Con. port on the front panel of the EL. If a safety chain needs to be integrated, please jump to Dry Contact Connection Guide in Owner's manual.
    • Plug in the power cable in the Power Port and turn on the power.
    • Electrolyser must be in Maintenance mode.

  • H2 PURGE and O2 VENT lines.

    • It is the installer's responsibility to regularly check and maintain H2 PURGE and O2 VENT lines, as well as to keep the lines free of ice or obstructions.

Warning

Do not insert any check valves or obstructions into the H2 PURGE lines. This can cause irreparable damage to your hydrogen system. No blockage should be present in O2 VENT on the User side of the interface. Never connect H2 PURGE line with O2 VENT line. Mixing these outputs is extremely dangerous.

# With Internet Connection

  1. Follow the instructions in the Enapter App to connect the device to Enapter Cloud.
  • Open the Enapter App and create an account.
  • Follow the steps to create a site.
  • Add a new device.
  • Scan a QR-code located on the front side of the device.

  1. Follow the steps described in The First Refilling.

  2. Electrolyser is ready for use!

# Without Internet Connection

Note

Electrolyser must be updated to firmware 1.6.0 or above.

  1. Connect Electrolyser and access the Web GUI. For more information please check Web GUI Documentation (opens new window).

  2. Follow the steps described in The First Refilling.

  3. Electrolyser is ready for use!

# 🚦 Status LEDs Indications

Action Description LED
Power on Power on The device will turn on as soon as the required input voltage is supplied to the EL2.1 and perform a startup self-check. Red, yellow & green blink thrice
Stand-by IDLE Stand-by (Idle state) The device is idle, waiting for the start of production. Red, yellow & green are off
Stand-by Max Pressure Stand-by (Max pressure state) The device reached maximum pressure (normally 35 bar) and will resume hydrogen production automatically when the restart output pressure setpoint is reached. Green blinking
Steady Steady The device in steady state. Green steady
Button press Button press When the start-stop button is pressed. Red, yellow & green blink once
Factory reset Factory Settings Reset Simultaneously pressing the start-stop button and power up the device will activate Factory Settings Reset. Running fire (each LED blinks after another)
Maintenance Maintenance mode The device is in maintenance mode. Yellow steady
Locate Locate device When locate device is enabled via remote control. Red, yellow & green blinking
Warning Warning Heads-up event which should be taken into account to avoid Error or Fatal Error. Yellow Blinks
Error Error System Stopped. Recoverable error. Red Blinks
Fatal Error Fatal Error System stopped. Unrecoverable error. Hardware repair required. Please contact Enapter support. Red and Yellow Blinks
Panic Hardware
Panic Software		 Panic System stopped. Unrecoverable error. Please contact Enapter support. Red steady with green steady (hardware problem) or yellow steady (software problem)

# ⚠️ Events

Note

All events listed below correspond with the latest firmware.

# Severity Levels

Code Severity Level LED Indication Description Comment
F Fatal Error Red and Yellow Blinks System stopped. Unrecoverable error. Hardware repair required. e.g. Pressure sensor is not connected or broken.
E Error Red Blinks System Stopped. Recoverable error. e.g. No input water pressure and internal water tank is empty.
W Warning Yellow Blinks Heads-up event which should be taken into account to avoid Error or Fatal Error. e.g. No input water pressure and internal water tank is full.

# Routines

Code Routine Comment
P Platform
C Electrolyte Pump
D Stack Ramp Down
R Water Refilling
S Steady Hydrogen Production
T Electrolyte Heater
U Stack Ramp Up
X Safety Check
F Anti-freezing
L Leakage Test
O Blowdown
H Heartbeat
Z Polarization Curve

# Warning, Error and Fatal Error Codes

Note

The Code and Name marked in bold are introduced in the current release of firmware.

Code Name Severity Code Routine Code Component Condition Description Troubleshooting
0x0000 none -- -- -- No error
0xFFF int -- -- -- Unexpected hardware failure Internal error Please contact Enapter Customer Support. Unexpected error, not further specified. Please read the logs for details.
0x1F81 FP_01 F P -- Voltage < 2.9V Brownout detected System detected a brownout. Please restore power and reset the system.
0x1F82 FP_02 F P -- Updated firmware has new mandatory settings New configuration parameters added Please contact Enapter Customer Support to configure the new system parameters.
0x1F83 FP_03 F P -- Hardware failure Broken periphery Please contact Enapter Customer Support. An unexpected error has occurred.
0x3F84 WP_04 W P -- Power Button pressed for longer than 5sec Stuck power button Power button was pressed for too long. Please release the button.
0x3F85 WP_05 W P CR2032 battery on control board CR2032 battery voltage is low Low battery voltage Please contact Enapter Customer Support. Main board battery charge is too low.
0x1F86 FP_06 F P Control board MCU Not enough free RAM Insufficient resources for DCN/IDCN Please contact Enapter Customer Support. Not enough hardware resources available to enable DCN/IDCN support.
0x108A FC_10 F C P107 Pump voltage too high Pump broken Please contact Enapter Customer Support. The electrolyte pump may be broken.
0x1114 FD_20 F D PT101A PT101A pressure drop > 2% Inner hydrogen pressure reading is below the expected value Please contact Enapter Customer Support. The inner hydrogen pressure transmitter detected a non-nominal pressure drop during the ramp down leakage test.
0x318A WR_10 W R PT105 Water inlet pressure > 4 barg Water inlet pressure is too high Water inlet pressure has exceeded 4 barg. The automatic refilling will not work.
0x3194 WR_20 W R PT105 Water inlet pressure < 1 barg Water inlet pressure is too low Insufficient water inlet pressure. The automatic refilling will not work.
0x118A FR_10 F R LSHH102A Water level triggers high level switch (LSHH102A) Electrolyte level is too high Electrolyte level is too high. Please interrupt the water supply to the system and contact Enapter Customer Support.
0x1194 FR_20 F R LSL102D Water level is below the low level switch (LSL102D) Electrolyte level is too low Please switch the Electrolyser into maintenance mode, drain it fully, and then fill the electrolyte tank with fresh electrolyte solution.
0x11B2 FR_50 F R LSL102D
LSM102C		 LSM102C active and LSL102D inactive Conflict between water level sensors (low and medium) Please contact Enapter Customer Support. Internal water sensors may be stuck (conflict between low and medium levels).
0x11B3 FR_51 F R LSM102C
LSH102B		 LSH102B active and LSM102C inactive Conflict between water level sensors (medium and high) Please contact Enapter Customer Support. Internal water sensors may be stuck (conflict between medium and high levels).
0x11B4 FR_52 F R LSH102B
LSHH102A		 LSHH102A active and LSH102B inactive Conflict between water level sensors (high and very high) Please contact Enapter Customer Support. Internal water sensors may be stuck (conflict between high and very high levels).
0x11A8 FR_40 F R -- Refilling unsuccessful Please contact Enapter Customer Support. Refilling was unsuccessful.
0x3195 WR_21 W R -- Water refilling time has exceeded the limit Refilling timeout Reboot the device and verify that the water inlet requirements are fulfilled.
0x3196 WR_22 W R -- Refilling failure Refilling has failed. Please check your water supply system.
0x31B3 WR_51 W R LSL102D Drain completely Electrolyte level is below the minimum. The Electrolyser is ready to be refilled.
0x31B4 WR_52 W R LSL102D Refill to high level Continue filling the electrolyte until it reaches the high level..
0x31B5 WR_53 W R LSH102B LSHH102A switch triggered Drain to high level Electrolyte level is above the high level (overfilling), please drain to the high level.
0x1201 FS_01 F S PSU 48V Wrong current value of 48V PSU Broken PSU Please contact Enapter Customer Support. PSU might be broken.
0x120A FS_10 F S PT101A
PSU 48V		 Broken membrane Please contact Enapter Customer Support. Stack membrane might be broken.
0x3215 WS_21 W S PT101A PT101A spike > 2% Drift in inner hydrogen pressure sensor Please contact Enapter Customer Support. Inner hydrogen pressure mismatch has been detected.
0x3216 WS_22 W S LSM102C Refilling is not occurring Please check the water supply. If not fixed soon, hydrogen production will stop.
0x321E WS_30 W S -- Stack voltage is too high Replace electrolyte The electrolyte quality has dropped. Replace the electrolyte. If the error persists, contact Enapter Customer Support.
0x128A FT_10 F T TT106 TT106 temperature > 58°C Electrolyte temperature is too high Please make sure that the air ventilation is not obstructed or the liquid cooling loop is operating properly as well as the ambient temperature does not exceed the device specifications. If the error persists, please contact Enapter Customer Support.
0x3294 WT_20 W T F103A F103A rotation < 600rpm Electrolyte cooling fan broken Please contact Enapter Customer Support. The electrolyte cooling fan must be checked.
0x3295 WT_21 W T TT102A TT102A temperature is not increasing or increasing too slow Slow electrolyte heating Electrolyte temperature is not increasing as expected. Please check the environmental conditions and contact Enapter Customer Support if the warning persists.
0x228A ET_10 E T TT102A TT102A temperature < 6°C Electrolyte temperature is too low Please make sure that the room temperature is at least 6°C. Keep the EL powered to ensure that the heating routine continues to protect the device internals.
0x330A WU_10 W U PT101A Inner pressure > atmospheric pressure + 10% Gas-side pressure is not atmospheric Hydrogen Vent (Hydrogen Purge) line pressure detected. Ramp-up is not possible. Please check that the Hydrogen Vent (Hydrogen Purge) line is not obstructed.
0x230A EU_10 E U LSM102C Electrolyte level in the internal electrolyte tank is below the medium level Not enough water for warm-up Heater cannot be started due to insufficient electrolyte level in the internal electrolyte tank. Refill the electrolyte, reset the system, and try again.
0x2401 EX_01 E X PT101A PT101A pressure > 37 for EL 2.1 35 bar
PT101A pressure > 9 for EL 2.1 8 bar		 Inner hydrogen pressure is too high Please contact Enapter Customer Support. The inner hydrogen pressure has exceeded 37 (or 9) barg (nominal, but high).
0x1402 FX_02 F X WPS104 WPS104 triggered Water presence detected Please contact Enapter Customer Support. Water is leaking inside the Electrolyser. Please remove the water supply and power from the system and drain immediately.
0x1403 FX_03 F X PSU 48V No voltage on PSU output PSU broken Please contact Enapter Customer Support. PSU failure detected. No voltage on stack.
0x1404 FX_04 F X HASS HASS current > 58A Stack current is too high Please contact Enapter Customer Support. Stack overcurrent detected.
0x1405 FX_05 F X TSH106 Backflow temperature is too high Please contact Enapter Customer Support. The stack outlet temperature is too high.
0x1407 FX_07 F X TS108 TS108 temperature > 75°C Control board temperature is too high The control board temperature is too high. Please check and clean air ventilation holes. If the error persists, contact Enapter Customer Support.
0x1408 FX_08 F X PSH102 PSH102 switch triggered Electrolyte tank pressure is too high Please make sure that the Oxygen Vent line is not blocked.
0x1409 FX_09 F X TSLL102B TSLL102B switch triggered Electrolyte temperature is too low Please make sure that the ambient temperature is at least 6°C. Keep the Electrolyser powered to ensure the heating routine continues to protect the device internals.
0x140A FX_10 F X PSHH101B (for Electrolysers with product codes: ELE210535A2AXV04, ELE210508A2AXV04, ELE210535A2LSV01, ELE210508A2LXV01, ELE210535D4AXV01, ELE210508D4AXV01, ELE210535A2ASV05, ELE210508A2ASV05, ELE210535A2ASV06, ELE210508A2ASV06), PT101A PSHH101B switch triggered
PT101A voltage > 3.5V		 Hydrogen pressure is too high Please contact Enapter Customer Support. The pressure transmitter calibration needs to be verified.
0x140B FX_11 F X Control Board MCU MCU temperature > 75°C Control Board MCU temperature is too high Please make sure that the ambient temperature is below 45°C.
0x140C FX_12 F X PT101C Outer hydrogen pressure is too high Please contact Enapter Customer Support. The calibration of the pressure transmitter needs to be verified.
0x141E FX_30 F X PT105 PT105 readings are outside of the allowed range Water inlet pressure transmitter broken Please contact Enapter Customer Support. The water inlet pressure cannot be measured.
0x141F FX_31 F X TT102A TT102A readings are outside of the allowed range Electrolyte tank temperature transmitter broken Please contact Enapter Customer Support. The temperature of the electrolyte tank cannot be measured.
0x1420 FX_32 F X FM106 FM106 readings are outside of the allowed range Electrolyte flow meter broken Please contact Enapter Customer Support. The electrolyte flow cannot be measured.
0x1421 FX_33 F X TT106 TT106 readings are outside of the allowed range Electrolyte backflow temperature transmitter broken Please contact Enapter Customer Support. The temperature of the electrolyte backflow cannot be measured.
0x1422 FX_34 F X PT101A PT101A readings are outside of the allowed range Inner hydrogen pressure transmitter broken Please contact Enapter Customer Support. The inner hydrogen pressure cannot be measured.
0x1423 FX_35 F X PT101C PT101C readings are outside of the allowed range Outer hydrogen pressure transmitter broken Please contact Enapter Customer Support. The outer hydrogen pressure cannot be measured.
0x1424 FX_36 F X F1084B F108B rotation < 3000 rpm Chassis circulation fan broken Please contact Enapter Customer Support. The chassis air circulation fan speed cannot be measured.
0x1425 FX_37 F X F108C F108C rotation < 3000 rpm Electronic compartment cooling fan broken Please contact Enapter Customer Support. The speed of the electronic compartment cooling fan cannot be measured.
0x1426 FX_38 F X TS108 TS108 readings are outside of the allowed range Electronic board temperature transmitter broken Please contact Enapter Customer Support. The temperature of the electronic board cannot be measured.
0x1427 FX_39 F X HASS HASS readings are outside of the allowed range Stack current sensor broken Please contact Enapter Customer Support. The stack current cannot be measured.
0x1428 FX_40 F X External circuit or switch Safety circuit open Dry contact triggered Dry contact triggered system stop. Please check your control system to understand what triggered the dry contact.
0x3432 WX_50 W X PT101A Inner hydrogen pressure check disabled Please contact Enapter Customer Support. Safety routine check for inner hydrogen pressure is disabled.
0x3433 WX_51 W X WPS104 Water presence check disabled Please contact Enapter Customer Support. Safety routine check for water presence is disabled.
0x3434 WX_52 W X PSU 48V Power supply unit check is disabled Please contact Enapter Customer Support. Safety routine check for the power supply unit is disabled.
0x3435 WX_53 W X HASS Stack current check disabled Please contact Enapter Customer Support. Safety routine check for the stack current is disabled.
0x3436 WX_54 W X TSH106 Electrolyte backflow temperature check disabled Please contact Enapter Customer Support. Safety routine check for the electrolyte backflow temperature is disabled.
0x3437 WX_55 W X TS108 Control board temperature check disabled Please contact Enapter Customer Support. Safety routine check for the control board temperature is disabled.
0x3438 WX_56 W X PSH102 Electrolyte tank pressure check disabled Please contact Enapter Customer Support. Safety routine check for the electrolyte tank pressure is disabled.
0x3439 WX_57 W X TSLL102B Low electrolyte temperature check disabled Please contact Enapter Customer Support. Safety routine check for the low electrolyte temperature is disabled.
0x343B WX_59 W X PT105 Water inlet pressure check disabled Please contact Enapter Customer Support. Safety routine check for the inlet pressure (PT105) is disabled.
0x343C WX_60 W X TT102A Electrolyte tank temperature check disabled Please contact Enapter Customer Support. Safety routine check for the electrolyte tank temperature is disabled.
0x343D WX_61 W X FM106 Electrolyte flow meter check disabled Please contact Enapter Customer Support. Safety routine check for the electrolyte flow meter (FM106) is disabled.
0x343E WX_62 W X F103A
V106		 Electrolyte cooling fan check disabled Please contact Enapter Customer Support. Safety routine check for the electrolyte cooling fan is disabled.
0x343F WX_63 W X TT106 Electrolyte backflow temperature check disabled Please contact Enapter Customer Support. Safety routine check for the electrolyte backflow temperature is disabled.
0x3440 WX_64 W X PT101C Outer hydrogen pressure check disabled Please contact Enapter Customer Support. Safety routine check for the outer hydrogen pressure is disabled.
0x3441 WX_65 W X F104B Chassis circulation fan check disabled Please contact Enapter Customer Support. Safety routine check for the chassis circulation fan is disabled.
0x3442 WX_66 W X F108C Electronic compartment cooling fan check disabled Please contact Enapter Customer Support. Safety routine check for the electronic compartment cooling fan is disabled.
0x3443 WX_67 W X Dry contact Dry contact check disabled Please contact Enapter Customer Support. Safety routine check for the dry contact is disabled. External dry signal will be ignored.
0x3445 WX_69 W X MCU Control Board temperature check disabled Please contact Enapter Customer Support. Safety routine check for the Control Board temperature is disabled.
0x148A FF_10 F F -- Frozen pipes Please contact Enapter Customer Support. Electrolyte flow is outside pump control limits.
0x1501 FL_01 F L -- Inner hydrogen pressure reading is below the expected value Please contact Enapter Customer Support. Pressure readings are below nominal values. The device needs to be checked or repaired.
0x350A WL_10 W L PT101A Insufficient pressure drop The pressure drop across the Hydrogen Vent line from the Electrolyser is insufficient. Check that the line is not obstructed.
0x358A WO_10 W O PT101C Outer pressure > 25 barg Outer hydrogen pressure is too high for blowdown Please lower the outer hydrogen pressure below 25 bar in order to start the blowdown routine.
0x3594 WO_20 W O -- Blowdown routine enabled Blowdown routine is active The blowdown procedure will start once hydrogen production starts. Please ensure that the Hydrogen Purge line is correctly connected and routed to a safe area.
0x159E FO_30 F O PT101A
CV101B		 Inner pressure has exceeded the allowed threshold Hydrogen Purge line obstruction or blowdown failure The Hydrogen Purge line is obstructed or the adjustable check valve (CV101B) cracking pressure is set incorrectly. Please verify that the Hydrogen Purge line is unobstructed, enable Blowdown for the next hydrogen production cycle, and reset the system. Please contact Enapter Customer Support.
0x360A WH_10 W H Ethernet
Modbus TCP		 Heartbeat packet was not received in time Lost Modbus safety heartbeat communication Modbus communication between the Electrolyser and the Modbus master device has been lost. Please check that the Ethernet cable is properly installed, the connection is established, and the Modbus master is operational.
0x360B WH_11 W H Wireless (Wi-Fi)
Enapter Gateway		 Heartbeat packet was not received in time Lost Enapter Gateway safety heartbeat communication Communication between the Electrolyser and the Enapter Gateway has been lost. Please check that the Wi-Fi connection is stable and ensure that the Gateway is operational.
0x360C WH_12 W H Control Board
UCM		 Heartbeat packet was not received in time Lost UCM communication Lost communication between the Control Board and the UCM (Universal Communication Module). Please contact Enapter Customer Support.
0x368A WZ_10 W Z -- Polarization curve start failed Please contact Enapter Customer Support.

# 📈 Remote Monitoring and Control

# Introduction

EL2.1 Control Electrolyser EL 2.1 comes with pre-installed UCM (Universal Communication Module) that allows users to monitor the device. Over-the-air updates ensure that the latest protocols and security fixes are supported.

EL2.1 Dashboard Pre-installed UCM connects to the Enapter Gateway and sends performance and error data to the Enapter Cloud. Data is stored in a time series database which displays it in real-time on customizable dashboards.

EL2.1 Mobile Enapter's mobile application ensures quick and easy installation of an energy system. Users can manage the EL 2.1 via the mobile app and receive push notifications, warning of any energy system's issues.

# Network Requirements

# WI-Fi Requirements

  • 802.11a/b/g/n (2.4 GHz only)

  • 802.12 WEP, WPA, WPA2 Personal (Pre-shared key)

  • Wi-Fi client isolation must be disabled

Note

No captive portal or WPA2 Enterprise supported.

General Wi-Fi Note

The Enapter Cloud connection based on wireless communication and therefore functionality can be affected by distance between devices, obstructions between the devices, and interference. Communication module inside Electrolyser works in station mode and utilizes Wi-Fi channel set in your infrastructure Wi-Fi router for used SSID. You are responsible for selecting the correct channel according to the local radio regulations.

# TCP/IP Network Requirements

Port Protocol Destination Host
(IP-Address / Range or Name)
80 TCP 193.9.249.0/24,
95.168.174.108,
95.168.174.212,
95.168.174.213
(api.enapter.com)
443 TCP 193.9.249.0/24,
95.168.174.108,
95.168.174.212,
95.168.174.213
(api.enapter.com)
123 UDP 193.9.249.0/24,
95.168.174.108,
95.168.174.212,
95.168.174.213
(ntp.enapter.com)
8883 TCP 193.9.249.0/24,
95.168.174.108,
95.168.174.212,
95.168.174.213
(mqtt.enapter.com)
1883 TCP 193.9.249.0/24,
95.168.174.108,
95.168.174.212,
95.168.174.213
(mqtt.enapter.com)

Note

Firewall must be stateful.

# Connecting your Electrolyser to Wi-Fi

To connect your EL 2.1 Electrolyser to a wireless network, follow steps in the iOS or Android Mobile Application guides below. Please note, the QR-code or preinstalled UCM ID and PIN are required when connecting to Wi-Fi as well as credentials for the 2,4 GHz Wi-Fi network.

📗 Enapter iOS Mobile Application Guide

📗 Enapter Android Mobile Application Guide

During connection to Wi-Fi network the QR-code or preinstalled UCM ID and PIN are needed. The location of both of them is displayed in pictures below.

Front view:

EL 2.1 Rev A. QR-code LocationEL 2.1 Rev A. Narrow Body QR-code Location

Rear view:

EL 2.1 Rev A. UCM ID LocationEL 2.1 Rev A. Narrow Body UCM ID Location

# How to Connect the Electrolyser to SCADA?

SCADA is a control system architecture comprising of computers, networked data communications, and graphical user interfaces (GUI) for high-level process supervisory management.

The EL 2.1 Electrolyser can be integrated into SCADA system with Modbus TCP protocol. Alternatively MQTT interface can be used when Enapter Gateway is used.

# Modbus TCP SCADA / PLC Connection

# With Dryer Control Network (DCN)

SCADA or PLC connect with DCN

In this case Dryer and Electrolyser or Electrolysers are connected over the Dryer Control Network. Dryer can be monitored and controlled using the Modbus TCP of any Electrolyser in the Dryer Control Network.

# Standalone (Without The Dryer Control Network)

SCADA or PLC connect without DCN

In this case Dryer will be fully automatic with no monitoring and control.

# MQTT Interface SCADA / PLC Connection

SCADA or PLC connect

In this case Dryer and Electrolyser or Electrolysers are connected over MQTT protocol using Enapter Gateway. Dryer can be monitored and controlled. Also, Enapter Rule Engine can be used to implement various rules to control and monitor Dryer.

# Connection Testing

Schneider Electric Modbus Tester (opens new window) is a convenient way to test Modbus TCP connection on Windows PC.

Modbus Tester Connection

Note

The DHCP server or static IP address must be configured and enabled on the PC connected to Electrolyser.

If you are using router connected to Electrolyser the DHCP mode must be enabled.

# Example: Reading Heartbeat Register

Modbus Tester

  1. TCP/IP Address or URL - enter the IP address of Electrolyser.

  2. Sample mode:

    • Manual - manual reading.
    • Scheduled - rereading.

  3. Sample Rate in ms - Rereading period.

2000 ms = 2 s

  1. Data type - Holding or Input registers.

    The list of all Holding and Input registers can be found at Latest Modbus TCP Interface.

    Register number must be plus 1.

    Heartbeat ModBus Timeout - 4600 + 1 = 4601

  2. Reading:

    • for Manual - single read.
    • for Scheduled - start of rereading.

  3. Read value.

Read value = 2 = 2000 ms.

# Syslog

Note

Electrolyser must be updated to firmware 1.8.0 or above.

Syslog is a Message Logging Standard by which almost any device or application can send data about status, events, diagnostics, and more.

Syslogging can be enabled in two ways:

  • Using Modbus register.
  • Using Web GUI of Electrolyser.

# Using Modbus Register

The following registers need to be configured to enable Syslog using Modbus:

  1. Holding Register 4042
  • Data type - Int32
  • Name - System logs
  • Severity:
    • 0 = disable logging (default)
    • 1 = only fatal errors
    • 2 = fatal errors and errors
    • 3 = warnings and more important
    • 4 = everything before and important messages
    • 5 = all messages, except internal debug ones
    • 6 = all messages
  1. Holding Register 4044
  • Data type - Uint32
  • Name - Syslog IP Address
  • Default value 255.255.255.255 (Broadcast)
  1. Holding Register 4046
  • Data type - Uint16
  • Name - Syslog Port
  • Default port 514

# Using Web GUI

System logs can be configured using the Web GUI of Electrolyser. Please check the Syslog Configuration (opens new window) paragraph of the Web GUI documentation.

# Receiving Syslogs

Tftpd64 (opens new window) can be handy to receive system logs on Windows PC.

Tftpd64

  • Enable system logging using Modbus Registers or Web GUI.
  • Tap on the Syslog server
  • You will receive system logs depending on chosen severity.

# Altitude Compensation

Note

Electrolyser must be updated to firmware 1.9.0 or above.

Our systems are installed in different places over the world but calibrated in Pisa and later will be calibrated in Saerbeck.

All places have different altitudes and this might affect affects the pressure reading values from the sensors.

This can be done using EL 2.1 Web GUI (opens new window) or EL 2.1 Modbus TCP Interface.

To set altitude using EL 2.1 Modbus TCP Interface you need to use Modbus Holding register #4142.

# Preheat

Note

Electrolyser must be updated to firmware 1.9.0 or above.

Preheat allows you to prepare Electrolyser to ramp up in a faster way.

Now it is usually takes about 20 minutes form 20 deg to 55 deg to reach a nominal production rate.

This functionality allows you to preheat Electrolyte to 45 deg.

This can be done using EL 2.1 Web GUI (opens new window), Enapter Cloud (opens new window) or EL 2.1 Modbus TCP Interface.

To activate preheat using EL 2.1 Modbus TCP Interface you need to use Modbus Holding register #1014.

# Stand-By Mode

Note

Electrolyser must be updated to firmware 1.9.0 or above.

When Electrolyser in Stand-By we have two possible actions for the Start/Stop button:

  1. Long press of the Start/Stop button (more than two seconds) will enable the system to re-start to reach the Max Pressure.
  2. The short press of the Start/Stop button will turn the system off.

# 🔌 Modbus TCP Interface

In case you want to monitor and manage your device with Modbus TCP interface check out the latest registers map guide and use cases:

Warning

In order to support multiple Modbus TCP masters connections firmware version must be updated to 1.5.1 or above

Warning

Modbus TCP works over an insecure connection and was designed for usage in isolated Local Area Networks for Operation, Administration and Management. Please take into account that connection to public networks such as the Internet is not recommended for security reasons.

# Examples

The sample Modbus TCP Python scripts are available at our Github Page (opens new window) under Apache 2.0 License.

# 🖥️ Web GUI

For more information please check WEB GUI (opens new window) Documentation.

# 💧 Refilling and Draining

Note

To fill and drain the electrolyte described in this section, you need an internet connection and Enapter mobile application. Filling and draining the electrolyte can also be done without internet connection using Enapter Web GUI (opens new window).

# The First Refilling

Warning

Please check Material Safety Data Sheet (MSDS)(EN, DE) for Potassium Hydroxide Aqueous Solution < 2 wt. %.

Before DI water is added automatically, the electrolyser needs to be initially filled with electrolyte.

Materials required:

  • Safety Glasses
  • Nitrile Gloves
  • Electrolyte bag with 3.6L of 1% KOH solution
  • Threaded puncture seal cap
  • Supplied refilling pipe
  • Mobile phone with installed Enapter App

Follow these steps to complete the first refilling of the electrolyte:

  • Step 1. Put on PPE. The minimum required equipment are safety goggles to protect from splashes and nitrile gloves. Ensure your working area is clean to avoid chemical contamination and potential exposure hazards.
  • Step 2. Electrolyser must be in Maintenance mode and the electrolyte tank must be empty. Do not leave the device powered and unattended while in Maintenance mode.
  • Step 3. Switch the original cap from the electrolyte bag to the threaded puncture seal cap. Connect refilling pipe to the electrolyte bag. Pull and hold the movable part of the connector and connect it to the electrolyte bag.
    Refilling Pipe Connection
  • Step 4. Fully insert the refilling pipe into the FILL/DRAIN port.
  • Step 5. Carefully raise the bag with the filling solution above the device. Never lift the electrolyte above your eye level. The solution will start filling the internal electrolyte tank immediately. If this does not occur, ensure the O2 VENT line is not obstructed.
  • Step 6.1. Follow the steps provided by the Enapter App: pour until the App shows a full tank.
  • Step 6.2. If you are using Web GUI follow the steps provided by the Electrolyte Refilling Wizard (opens new window): pour until the Wizard shows a full tank.
  • Step 7. Disconnect refilling pipe from the FILL/DRAIN port by pressing down the button on the port. Press the button and pull the connector out of the port.
  • Step 8. Confirm finish of refilling by pressing the Exit button in the App.

You are done! The device is ready to be used and no other action is required. The EL 2.1 will automatically refill DI water whenever it needs it.

# Overfilling

During the First Refilling, the electrolyte can exceed the maximum level - overfilling. This will make Electrolyser go into error - if this happens, you need to pour off the electrolyte back to the electrolyte bag completely and follow these steps:

  • Step 1. Put the electrolyte bag down and pour off the electrolyte completely.
  • Step 2. Turn OFF an ON the breaker on the front panel of Electrolyser.
  • Step 3. Return to the First Refilling.

Note

Starting from firmware 1.6.0 Electrolyser will not go into error. You need to put the bag down and pour off the excess electrolyte.

# Electrolyte Draining

The module must be drained for transport, installation, and before the routine changing of the electrolyte in Electrolyser to prolong system life.

Materials required:

  • Safety Glasses
  • Nitrile Gloves
  • Clean 5L container
  • Supplied draining pipe
  • Mobile phone with installed Enapter App

Follow these steps to drain Electrolyser:

  • Step 1. Put on PPE. The minimum required equipment are safety goggles to protect from splashes and nitrile gloves. Ensure your working area is clean to avoid chemical contamination and potential exposure hazards.
  • Step 2. Enable Maintenance mode using the Enapter App or Web GUI.
  • Step 3. Make sure the O2 VENT line is not obstructed.
  • Step 4. Prepare the container to catch the drained liquid and insert the end of the draining pipe into it.
  • Step 5. Fully insert the draining pipe into the FILL/DRAIN port. The solution will start pouring out immediately.
  • Step 6. Once the solution stops pouring, disconnect the draining pipe from the FILL/DRAIN port by pressing down the button on the port. Press the button and pull the connector out of the port.

Warning

Thermal hazard! Avoid contact with the heated electrolyte solution.

# 🔧 Maintenance Tasks

The EL 2.1 is designed to provide many hours of service with minimal maintenance. Proper care and maintenance by qualified personnel help to maximize the operating hours of the unit. The Mobile Application, Cloud Connection and Web GUI help to execute the refilling process.

# Inspect Physical Deterioration

  • Period - once per year.

  • Instructions - The unit should be inspected for obvious signs of physical damages.

# Leakage Testing

  • Period - once per year.

  • Instructions - All hydrogen connections must be tested for leakages. Enapter recommends to use one of the techniques listed in Appendix I in Owner's manual.

# Electrolyte Replacement

  • Period - once per year.

  • Instructions - For maintaining the device after commissioning, the internal tank must be emptied and new electrolyte must be filled into the device. For more information, please refer to the Electrolyte Draining section, and then follow the instructions for the The First Refilling of the electrolyte.

  • Depending on the frequency of use it is possible that the internal tank needs to be emptied and refilled more than once a year. By connecting your device to the Enapter Cloud (opens new window), it is possible to receive alerts when the stack's voltage starts to increasing – this typically means an electrolyte change is needed. The electrolyte change will help the electrolytic stack to return to a lower voltage, decreasing the power consumption of the device and increasing its lifetime.

# Cleaning

  • Period - once per year.

  • Instructions - When performing the routine maintenance processes and checks, the machine should be inspected and cleaned. Start by carefully using a vacuum cleaner (not included) to clean out the ventilation openings/grills. Afterward, use a damp cloth (no acids, aggressive or abrasive substances) to clean the outside of the unit.

# 🕸️ Dryer Control Network

For more information please check Dryer Control Network (opens new window) Documentation.

# 💚 Safety Heartbeat

This functionality increases safety in cases of loss of control by Enapter Gateway or any 3rd party Modbus master device.

Safety Heartbeat presented in EL 2.1 firmware 1.2.0 is a periodic signal generated by Enapter Gateway or any Modbus master device (i.e PLC) to indicate continuous connection with Electrolyser.

If Electrolyser does not receive the heartbeat in a time (heartbeat period) — the machine will normally shut down. Lose of the signal may happen when Gateway or PLC is powered off, when there is connection issue.

# EL 2.1 Heartbeat

To activate Heartbeat on the EL 2.1 you need to change Heartbeat parameters. To do it use Modbus Holding Register #4600 (for Modbus master) or #4602 (for Enapter Gateway).

Parameters:

Heartbeat_gatewaytimeout_s - timeout for Gateway Heartbeat in seconds. Default value = 0 (disabled).

Heartbeat_modbustimeout_s - timeout for Modbus Heartbeat in seconds. Default value = 0 (disabled).

This parameters can also be changed using Web GUI. Navigate to Configuration (opens new window) bar and set Heartbeat timeouts.

# Gateway Heartbeat

How to activate Safety Heartbeat on the Gateway:

  1. Connect to the Gateway - please check this page (opens new window).

  2. Configure Safety Heartbeat on the Gateway - please check this page (opens new window).

# Modbus Heartbeat

How to activate Safety Heartbeat using Modbus protocol - please check the example of Writing Heartbeat Modbus Timeout (opens new window).

# 💨 Blowdown Routine

This automatic routine will appear if Electrolyser has not been in STEADY or RAMP UP mode for a certain period of time; in other words, if Electrolyser has not been in use for some time. The relief valve on the outlet of Electrolyser which is a mechanical spring valve, not being in use it might not work properly when the 29 bar is reached and might need extra pressure to open the first time.

There will be a warning that notifies when the routine starts - Warning WO_20: The Blowdown procedure will be started at H2 production start.

The Blowdown Routine doesn't interfere with the normal ramp up routine, but only makes some changes to the safety routine checks.

PT101A Safety Check will be disabled during Blowdown Routine. Warning WX_50: Hydrogen inner pressure check disabled will be raised.

The Blowdown Routine can be enabled using EL 2.1 Web GUI (opens new window) or EL 2.1 Modbus TCP Interface.

To activate Blowdown using EL 2.1 Modbus TCP Interface use Modbus Holding register #1010.

# 💻 Firmware

# Firmware 1.12.1 ✨

# Previous Versions

Show more

# Firmware 1.12.0

# Firmware 1.11.1

# Firmware 1.11.0

# Firmware 1.10.2

# Firmware 1.10.1

# Firmware 1.10.0

# Firmware 1.9.3

# Firmware 1.9.2

# Firmware 1.9.1

# Firmware 1.9.0

# Firmware 1.8.4

# Firmware 1.8.3

# Firmware 1.8.2

# Firmware 1.8.1

# Firmware 1.8.0

# Firmware 1.7.0

# Firmware 1.6.1

# Firmware 1.6.0

# Firmware 1.5.2

# Firmware 1.5.1

# Firmware 1.5.0

# Firmware 1.4.0

# Firmware 1.3.0

# Firmware 1.2.3

# Firmware 1.2.1

# Firmware 1.2.0

# Firmware 1.1.2

# Firmware 1.1.1

# Firmware 1.1.0

# Firmware 1.0.2

# Firmware 1.0.1

# Firmware 1.0.0

# How to Update the Firmware?

Note

If Site has Enapter Gateway it needs to be updated to version 1.8.9 or higher.

Note

Make sure you have physical access to the device before starting the update process.

Warning

Do not power off the device during the firmware update.

Warning

Remove Dryer Control Network before updating the firmware.

# Updating the Firmware Using Enapter Cloud

  1. Login into Enapter Cloud (opens new window).
  2. Open your Site navigate to Electrolyser's page you want to update.
  3. At the left sidebar click on the Update Firmware button at the Firmware Info section.
  4. In opened window click on the Check for updates button.
  5. If you have the latest firmware version you will see You have the latest version.
  6. If update is available you will see Change Log.
  7. Click the Update button to update the firmware.
  8. Wait until the update complete. This can take a while.

# Updating the Firmware Using Enapter Mobile App

  1. Login into Enapter Mobile App.
  2. Open your Site and navigate to Electrolyser's page you want to update.
  3. Navigate to the About tab (ℹ️) and click on the Firmware button.
  4. In opened tab click on the Check for Updates button.
  5. If you have the latest firmware version you will see You have the latest version.
  6. If update is available you will see Change Log.
  7. Click the Update button to update the firmware.
  8. Wait until the update complete. This can take a while.

# Updating the Firmware Using Electrolyser Web GUI

Note

Firmware updates with Electrolyser Web GUI are supported on Firmware versions 1.7.0 and higher.

For more information please check Enapter Web GUI Documentation (opens new window).

# ⚙️ Factory Settings Reset

Factory Settings Reset (Hard Reset) presented in EL 2.1 firmware 1.3.0 allows to reset device to factory settings.

To enable Factory Settings Reset:

  • Turn off the device.
  • Press and hold the Start/Stop button and turn on the device.
  • Hold the button. LEDs start blinking one after another.
  • Release the button. All LEDs will blink once.
  • Factory Settings Reset started. Device will be automatically rebooted. All LEDs blink trice.

There will be a warning if the Start/Stop button have not been released: WARNING WP_04: STICKY BUTTON.

After the Factory Settings Reset Electrolyser will move to Maintenance Mode if water level is low than low level. If water level is more than low level Electrolyser will remain in Operation Mode.

# Video Guide

Watch our video tutorial on performing a Factory Settings Reset. Follow easy steps to restore your device to original settings. For more details, click Show more.

Show more

# 🆘 Self Service Troubleshooting Flowcharts

Enapter Electrolyser is modern hardware / software device. Embedded software monitors wide range of digital and analog sensors and control different actuators inside to ensure correct behavior and prevent failures. In case your Electrolyser trigger any kind of event you can try to troubleshoot them using our Self Service Troubleshooting Flowcharts.

# 🐞 Known Hardware Bugs

  • Electrostatic discharge into the Wi-Fi antenna, may cause crash Ethernet and modbus.

    This bug occurs in Electrolysers with product codes:

    • ELE210535A2AXV01
    • ELE210508A2AXV01
    • ELE210535A2AXV02
    • ELE210508A2AXV02
    • ELE210535A2AXV03
    • ELE210508A2AXV03
    • ELE210535A2AXV04
    • ELE210508A2AXV04
    • ELE210535A2ASV05
    • ELE210508A2ASV05
    • ELE210535A2ASV06
    • ELE210508A2ASV06
    • ELE210535A2ASV09
    • ELE210508A2ASV09
    • ELE210535D4AXV01
    • ELE210508D4AXV01
    • ELE210535A2LSV01
    • ELE210508A2LXV01
    • ELE210535A2LSV05
    • ELE210508A2LSV05

    Solution: Reboot Electrolyser using cloud (find the device in Enapter Cloud (opens new window) and execute Reset command (Commands > Electrolyser > Reset) or do system power restart (turn off it and restore power back).

  • WX_51 Error

    The water presence sensor might trigger false positives on old electrolysers using Control Boards with eFuse 0xE210.

    Solution: Please check your eFuse version, on the electrolyser overview page. You can find the version in the Firmware Info section. The eFuse version is located at the bottom of the page behind the slash starting with 0x. Please contact support@enapter.com if you are using eFuse version 0xE210 and the error WX_51 appears on your electrolyser. Enapter is then able to deactivate the false positive trigger.

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Electrolyser 2.1 (EL 2.1)