Business EnergyManager frequently asked questions

These are some of the most frequently asked questions we get asked about the Business EnergyManager (BEM).


Will I still qualify for the Direct Debit discount?

Yes, this comes with a 4% discount off the prices agreed on your fixed price contract.

What happens if I move premises?

If you're an existing EnergyManager customer, simply take it to your new premises. Make sure you let us know about your new address and we can arrange a fixed price contract for your new premises. Then use the Business EnergyManager to ensure you're in control of your electricity by measuring, monitoring and reducing your company's consumption.

How can I dispose of my Business EnergyManager?

If you no longer need or want your Business EnergyManager; in accordance with the Waste Electrical and Electronic Equipment Regulations 2007, you are responsible for the safe disposal of the Business EnergyManager device that has been supplied by E.ON.

You can return the item to us at E.ON Logistics Centre, Business Energy Monitor Disposal, Unit A, Moorcroft Park, Patent Drive, Wednesbury, West Midlands, WS10 7XD.

Alternatively you can arrange for the safe disposal of the item yourself or in accordance with any disposal scheme you may have in place.

Energy Monitor

I have a three phase supply, can I use the energy monitor?

Yes, although you will need an additional two sensors to clip onto the other two cables which transport electricity from your meter. If you know at point of sale that you have a three phase supply please let us know and we can order some for you. If you already have your EnergyManager pack simply call us on 0333 202 4621 and we’ll get them sent out to you.

My monitor is faulty or has stopped working, what do I do?

If your device doesn't work, try unplugging the monitor for 30 seconds and then turn it back on. You can also refer to the user guide you receive in your EnergyManager pack.

Your energy monitor comes with a standard one year warranty, so if you're sure you've installed the monitor correctly and you’re still having problems, please call us on 0333 202 4621.

Why is my display showing 0 watts, or is very low?

Check the position of the clamp as it's fairly easy to place the clamp around more than one cable or around a multi-core cable. The clamp must be placed around one single mains cable, ideally the fourth from the left as you look at the meter. If you place it around both Live and Neutral, it will have a cancelling effect or possibly a very low reading that doesn't reflect the real consumption.

Why is the energy use displayed on the monitor different from what my meter shows?

Our monitor is specifically designed to highlight areas of usage (and more importantly wastage), it's not intended to replace or compete with your more accurate meter. It can complement your installed system by showing you what appliances are costing money now or recently, whereas your meter will show you accumulated usage.

I have different unit prices for different times of the day. What figure should I enter into the display?

The Energy Monitor shows indicative usage levels and trends, and will be able to give you a more accurate view of your electricity costs (based on the prices you pay at different times of the day) if you enter your tariff and prices when you install it. Please refer to the User Guide for more information on how to input your unit rates for your particular tariff.

Does the device need batteries?

Yes as this allows the device to be portable and these should have been included in the box when you received your package. If you didn't receive them, please call us on 0333 202 4621. The display itself can run off the mains but we do not supply the mains AC adaptor. If you require one, please contact Efergy Technologies on 01143 272 646 or visit their site (opens in new window).

Will information be lost in the event of loss of power to the device?

All stored information (time, unit cost, historic data) will be held in the memory, although the clock will remain at the time when the power stopped.

Does it matter where I put the monitor?

The radio signal from the transmitter should cover a distance of 30 metres, but solid walls and obstructions can affect this. It's good to place it where you can easily glance at it, perhaps at your desk or on a shelf.

Do I turn off the monitor when the premises are closed?

We’d recommend leaving it on so you can see how much you’re using when you’re not there. If there are long periods when you’re not there, make sure the monitor has enough storage left to keep recording without losing any data. The monitor will only store your consumption on a rolling 30 day basis.

How do I keep my monitor clean?

You can clean the monitor with a damp cloth or duster. Do not immerse it in water.

Why do I see dashes instead of energy (watts) occasionally?

From time to time the display unit may temporarily lose its signal. This can be caused by a number of things but it should reconnect in a matter of seconds.

How can I detect faulty appliances?

The monitor won’t identify if a specific appliance is faulty, however watch the monitor when different appliances are turned on and off. Check the consumption against the manufacturer’s specification, it may differ slightly and older machines are almost certain to use more, but there may come a time when the appliance is using far more than it should and replacement should be considered.

I've noticed that if I'm using a lot of electricity at once the screen goes blank. Why does it do this?

This should only happen if you’re using more than 20Kwh at any one time, this is a large amount of electricity and should only happen for three phase customers who will have three sensors. The display will go blank due to the limitations of the segments on the screen for peak usage amounts over 20kW. The data will be stored in the history though so you won’t lose any information.

Why is the monitor not 100% accurate?

The monitor we use is set to 240V however the voltage at each property is subject to variations from this and could range between 216V-253V. The data collected by the monitor therefore won’t ever be 100% accurate.

How can I find out what my voltage is?

The best way to identify what your voltage is, is to get a qualified electrician to test your supply for you – you should never attempt to do this yourself.

If I find out what my voltage is can I adjust my monitor?

Yes your monitor is adjustable and you can change the voltage it is set to, simply consult your user guide on how to adjust this. Instructions can be found on page 5.

If I find out what my voltage is and then adjust my monitor will the data then be 100% accurate?

No, even if you get your supply tested that will only tell you what the voltage is at the point it is tested - this is still subject to fluctuation and will mean that the monitor will still be unable to record 100% accurate data.

How has it got a Which Best Buy if it isn't 100% accurate?

Which? carried out a variety of tests on various comparable monitoring devices  in order to give it a ‘Which? Best Buy ‘recommendation.