Instruction videos, User Manuals, Software, FAQ

e2 classic
e2 breaker
e2 classic 3ph


View in the videos below how to install your E2 CLASSIC or Ε2 CLASSIC breaker energy monitor.

Installation video of your E2 CLASSIC energy monitor (all versions).

Typical efergy monitor installation video in single phase supply.


View in the videos below how to setup your E2 CLASSIC or Ε2 CLASSIC breaker energy monitor.

Initial setup video of your E2 CLASSIC energy monitor (all versions).

Video for setting up multiple tariffs on your E2 CLASSIC (all versions).


Download the file according to your E2 CLASSIC version.



Download the file to your PC, according to your OS.

What type of wireless communications does E2 Classic use ;

Our transmitters use 433.5 MHZ (Megahertz) to communicate with the display monitor.

Which is the transmission rate?

The transmission rate describes how often the transmitter sends a data signal to the monitor. Our transmitters using CT clamp sensors can be set to send energy data every 10secs/15secs/20secs (for EU) and 10/15/20sec (for North America. For transmitters with IR sensors it send data every 30 sec.

How long will the E2 Classic records data for?

Our E2 monitor can record data for the last 7 days, 7 weeks, 24 months. Also, the monitor keeps hourly records of 240 days, for you to download to your PC/MAC and view them via the e-Link software

Will I lose the information in the event of a power cut or when I remove the batteries?

All information is stored in an internal memory which saves and holds the data even in case of power cut, or when you remove the batteries. On resetting the display you will lose all information stored in the memory. However your time and date will remain unchanged.

How long should the batteries last?

Battery life depends upon the quality and condition of batteries used, and the intervals between
transmissions. In ideal conditions up to 18 months of battery life can be expected in our products using 2400mAh alkaline batteries.

Can my energy monitor be used with economy-7 or dual timed tariffs? (for UK only)

Yes, the monitor can be used in conjunction with economy 7 and other (up to 4) timed tariffs. By a simple adjustment in the display’s settings.

I have four dashes (- - -) showing on the display. What does this mean?

Move the display monitor closer to the transmitter and press the Link Button (on transmitter and display). If the dashes remain on the display this would indicate the transmitter and receiver are not communicating. Please contact efergy Customer Service to help locate the problem.

Are the monitors three phase compatible?

Yes… If you have a three phase supply, or economy 7 meter, then you may require additional sensors. These can be simply plugged into the additional sockets at the base of the transmitter. However the monitor/display only shows consolidated average of three phase consumption. If you use 3 sensors for 3-phase system, and you will need to set the voltage as follows:

  • Unbalanced load, set Voltage to 230-240V
  • Balanced load, set Voltage to 380-400V

Can my E2 Classic/Breaker connect to my PC?

Yes. The E2 monitor has a USB port on the back side, so you can connect it to your PC/MAC. Use the E-link software to run the connection process and to download the stored data to your PC or MAC.

Is my E2 Classic/Breaker compatible with you engage platform?

Yes. The E2 monitor is ready to be used with our web platform engage. You will only need to buy our engage hub solo device to connect with the monitor.

Check out our Energy monitors FAQ page for more answers and solutions.