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

Enapter’s patented anion exchange membrane (AEM) electrolyser is a standardized, stackable and flexible system to produce on-site hydrogen. The modular design – paired with advanced software integration – allows set up in minutes and remote control and management. Stack this electrolyser to achieve the required hydrogen flowrate.

# πŸ“– Resources

Datasheets Owner's Manuals Quick Start Guides Battery Limits CAD Drawings
EL 2.1 Rev A. EN EN EN EN 3D STP
3D IGS
EL 2.1 Rev A.
Narrow Body
EN EN EN 3D STP
3D IGS
EL 2.1 Rev A.
Liquid Cooled
EN EN EN EN 3D STP
3D IGS
EL 2.1 Rev A.
Direct Current
EN EN EN 3D STP
3D IGS
EL 2.1 Rev A.
Narrow Body Direct Current
EN EN 3D STP
3D IGS

# πŸ“Έ 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

# 🚦 Status LEDs Indications

Action Description LED
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 state) The device is idle, waiting for the start of production. Red, yellow & green are off
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 The device in steady state. Green steady
Button press When the start-stop button is pressed. Red, yellow & green blink once
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 mode The device is in maintenance mode. Yellow steady
Locate device When locate device is enabled via remote control. Red, yellow & green blinking
Warning Heads-up event which should be taken into account to avoid Error or Fatal Error. Yellow Blinks
Error System Stopped. Recoverable error. Red Blinks
Fatal Error System stopped. Unrecoverable error. Hardware repair required. Please contact Enapter support. Red and Yellow Blinks
Panic System stopped. Unrecoverable error. Please contact Enapter support. Red steady with green steady (hardware problem) or yellow steady (software problem)

# πŸ’§ Refilling and Draining

# First Refilling

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. The electrolyser must be in Maintenance mode and the electrolyte tank must be empty. You can check that by looking at the status LSL102D_in (Low electrolyte level) in the Cloud: it is β€žfalseβ€œ (red) when the tank is empty. If not - contact Support. 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. Follow the steps provided by the Mobile Phone App: pour until the App 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.

During the First Refilling, the electrolyte can exceed the maximum level - overfilling. This will make the 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. Turn OFF the breaker on the front panel of the electrolyser.
  • Step 2. Put the electrolyte bag down and pour off the electrolyte completely.
  • Step 3. Turn ON the breaker on the front panel of the electrolyser.
  • Step 4. Return to the First Refilling.

# Draining

The module must be drained for transport, installation, and before the routine changing of the electrolyte in the 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 the 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.
  • 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.

# πŸ’¨ Blowdown Routine

This automatic routine will appear if the electrolyser has not been in STEADY or RAMP UP mode for a certain period of time; in other words, if the electrolyser has not been in use for some time. The relief valve on the outlet of the 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 β€œWO_20”.

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

The Blowdown Routine can be enabled using Enapter Cloud.

# βš™οΈ Factory Settings Reset

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

To enable Factory Settings Reset user should simultaneously press the Start/Stop button and power up the device, then button should be pressed until LEDs blink running fire (each LED blinks after another) and released in 5 seconds. The electrolyser sends command to UCM to perform Factory Settings Reset. The electrolyser and UCM will be reset to Factory Default Settings.

There will be a warning if the Start/Stop button have not been released in 5 seconds: WARNING β€œWP_04”.

The electrolyser can be reset using Cloud command Factory Reset or Modbus Holding Register #9 - in this case only the electrolyser settings are reset to Factory Default Settings while UCM settings are saved.

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

# πŸ“ˆ Remote Monitoring and Control

# Introduction

EL2.1 Control The 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 send performance and error data to the Enapter Cloud. The data is stored in a time series database which displays it real-time on customizable dashboards.

EL2.1 Mobile Enapter’s mobile application ensures quick and easy installation of any energy system. Users can manage the EL 2.1 via the mobile app and will receive push notifications to warn of energy system 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 the functionality can be affected with distance in between devices, obstructions between the devices and interference. Communication module inside the electrolyser works in station mode and utilizes Wi-Fi channel set in your infrastructure Wi-Fi router for used SSID. You are responsible to select 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 the EL 2.1 electrolyser to wireless networks, follow the steps in the iOS or Android Mobile Application guides below. Please note, the QR-code or preinstalled UCM's ID and PIN are required when connecting to Wi-Fi as well as credentials for the 2,4 GHz Wi-Fi network.

πŸ“— Enapter iOS Mobile Application Guide

πŸ“— Enapter Android Mobile Application Guide

During connection to Wi-Fi network the QR-code or preinstalled UCM's ID and PIN needed. The location for both of them is shown on 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

# 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 v1.2.0 is a periodic signal generated by Enapter Gateway or any Modbus master device (i.e PLC) to indicate continuous connection with the electrolyser.

If the electrolyser does not receive the heartbeat in a time (heartbeat period) β€” 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).

# 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).

# πŸ•ΈοΈ Dryer Control Network

# Introduction

The Dryer Control Network function is Smart Control for the Dryer using M2M (opens new window) communication between electrolyzers and the dryer via a wireless MESH network. This type of control allows to lower down energy consumption, reduce the possibility of operating errors and increase the safety.

The MESH network operates on the basis of the IEEE 802.11a/b/g/n standard at 2.4 GHz and allows you to connect up to 6 devices (1 Dryer and up to 5 Electrolysers). Devices automatically choose the master router in the network based on Wi-Fi signal strength to ensure the reliable communication.

Aside to intelligent control, Dryer Control Network allows to monitor and manage the Dryer from any Electrolyser in the MESH network using Modbus TCP interface. To learn more check the Latest Modbus TCP Interface paragraph for Dryer registers.

# How it works?

When Dryer Control Network is enabled, the Dryer will start only when at least one of the Electrolysers is reporting the Steady state. In all other cases the dryer will be automatically turned off. When you want to ensure that Dryer won't be started automatically you can stop it manually by pressing the button on the front panel or via the stop button in the cloud.

# Requirements

  • Dryer Firmware: 3.1 and later.
  • Electrolyser 2.1 Firmware: 1.5 and later.
  • Mobile Application: 2.11 and later.

Electrolysers and Dryer must be connected to the Cloud and available online.

# Enabling Dryer Control Network

To enable Dryer Control Network:

  1. Run Enapter App and navigate to your site Dashboard
  2. Select the Dryer from the list and click on Info button in the top right corner of the screen
  3. Click the Dryer Control Network menu item
  4. Click Create Control Network
  5. With a checkboxes select up to 5 Electrolysers which are physically connected to the Dryer.
  6. Click Create button and confirm it
  7. Wait while Network enabled on all devices

# Removing Dryer Control Network

To remove Dryer Control Network:

  1. Run Enapter App and navigate to your site Dashboard
  2. Select the Dryer from the list and click on Info button in the top right corner
  3. Click the Dryer Control Network menu item
  4. Click Delete Network and confirm removal
  5. Wait while Network is removed

# Known issues

  • If the WiFi router power cut happens for a very short period it is possible that one of the devices connected to the MESH network won't be able to connect to the cloud and will have the offline status. To resolve the issue you will need to manually reboot the device. This issue will be fixed in future FW releases.

# Limitations

General Wi-Fi Communication Note

The Dryer Control Network based on wireless communication therefore the functionality can be affected with distance in between devices, obstructions between the devices and interference. At the moment when this guide is written the MESH network utilizes the same Wi-Fi channel as the infrastructure Wi-Fi router used for Enapter Cloud connection. You responsible to select the correct channel according to the local radio regulations.

Factory Reset Note

When Dryer Control Network is enabled it is not possible to set up device (Electrolyser or Dryer) using Mobile App by scanning QR code without making Factory Settings Reset or Removing Dryer Control Network.

Wi-Fi SSID Change

In case you plan to move the systems to a new site location where different Wi-Fi SSID is used it is recommended to Remove Dryer Control Network in advance using Mobile Application while devices are still connected using existing Wi-Fi SSID to the Cloud.

In case your device is already Offline and it is not possible to use old Wi-Fi SSID you required to perform Factory Settings Reset. To learn how to make this - refer to the Factory Settings Reset paragraph of this manual.

Dryer Control Network and dryer-management-rule Plugin Compatibility

The Dryer Control Network is incompatible with dryer-management-rule plugin on the Gateway. It is required to disable plugin before activation of the Dryer Control Network.

# πŸ”Œ Modbus TCP Interface

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

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

# πŸ’» Firmware

# Firmware 1.5.2 ✨

# Previous Versions

# 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

# 🐞 Known Hardware Bugs

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

    Solution: Reboot the 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).