Watts Clever Smart Energy Monitor (EW4500)

Watts Clever

$74.90 AUD $99.95 AUD

Free delivery on all orders over $200

The Watts Clever EW4500 is a Wireless Energy Monitor that works with 'smart' or 'digital' electricity meters.

The EW4500 energy monitor can be self-installed in any household or business that has these electricity meters.

* Our price includes everything you need - with batteries *

Energy Monitor for Smart Meters - How to install

Simply mount the sensor on top of the flashing LED labelled 1Wh/imp (or similar) on the front of your meter, then follow set-up instructions. The LED sensor is known to work on a wide range of meters including those shown below (Landis+Gyr, i-credit and others). Download the Quick Installation Guide.

The sensor goes over the LED labelled with the red arrows.

If your smart meter does not have an impulse LED indicator like those above then it may not be compatible. For example, some smart meters only show usage on the LCD screen with a square or arrow (example below). If your meter only has this usage indicator then we recommend buying the regular wireless energy monitor.

What's in the box?

1. Display screen (this goes inside your home)

2. LED sensor device (this sticks on the front side of your ‘smart’ or digital meter in your meter box)

3. Transmitter unit (sits in your meter box, battery powered)

4. Sticker accessories to mount the LED sensor on your meter

5. Instruction manual

Energy Monitor Overview

Here is a brief overview of what you can see on the energy monitor's indoor display screen:

Smart Meter Energy Monitor In Home Display Screen- The main display shows current (real time) energy consumption in kW, cost and CO2 emissions.

- History can be viewed for the last 24 hours, days, weeks, or months.

- Switch between modes of cumulative Cost, CO2 or kWh.

Smart Energy Monitor EW4500 - Technical specifications

  • Supports up to 3 tariff settings per day
  • Supports Time-Of-Use tiered-rate settings
  • 3 phase compatible (provided you have one smart meter which covers all three phases)
  • Display screen power = 2 x AA batteries (included)
  • Transmitter power = 2 x AA batteries (included)
  • Battery lifetime = approx 2 years
  • Transmitter range = up to 80 metres
  • Data download = no
  • See also our FAQ section below.

EW4500 Energy Monitor Support & FAQ

Can I download the instruction manual?


- Quick Guide (1MB PDF)

- Full Manual (4.8MB PDF)

Does it work with three phase power?

Yes. It will report the usage from one smart or digital electricity meter (whether it is a single or three phase meter). However, if you have multiple digital meters, this product can only be attached to one of them.

How accurate are the readings?

The EW4500 energy monitor tracks usage to within about 1% of your actual consumption.

Is the display screen portable?

Yes. This monitor runs off batteries (supplied). It is designed to run off one set of batteries for several years.

Can I use it to check individual appliance usage?

Yes, to some extent. You can do this by observing the difference in total power consumption when the appliance is turned on and off. The screen updates every 30 seconds.

To monitor individual appliance consumption in detail we recommend using the plug-in Power Meter or Power Mate Lite.

Is data available for download?

No. The EW4500 cannot be connected to your computer. If you require a solution that includes a software option see the Efergy Engage Hub or Power Tracker.

How many electricity tariffs can be entered?

3 per weekday and 3 per weekend (see manual for details).

How far will the transmitter signal travel?

Up to 80 metres. It is designed to travel through 'normal' blockages such as your meter board cover and external walls.

Can the EW4500 be used with solar power?

Yes. This unit will report back exactly what the smart/digital meter reports via the flashing LED on the front of the meter. In our experience this LED will stop flashing when solar power production exceeds household consumption.

In other words, it will report net household consumption. For example, if during the day your solar is producing 1kW and your house is using 2.5kW, the energy monitor will show a net consumption of 1.5kW. For this reason the EW4500 can often be a simple (install yourself) yet effective alternative to our solar energy monitor.

Can it be self-installed?

Yes. All you need to do is mount the LED sensor on the front of your smart or digital meter inside your meter box. Adhesive stickers are included in the kit for this purpose. Here are some example installation photos:


What does the chart and “0, -1, -2...″ mean on the display?

The EW4500 allows you to scroll through recent cost and consumption history on the screen.

The time periods available are Hour, Day, Week, and Month. When ‘Hour’ is selected and the square brackets are around the 0, data will show for the current hour’s energy consumption. [ -1 ] means last hour. [-2] means two hours ago, and so on.

The bar chart underneath these numbers shows the trend in consumption over the time period selected.

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Watts Clever Smart Energy Monitor (EW4500) has a rating of 5.0 stars based on 8 reviews.

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Please view our FAQ, delivery, and product pages for commonly asked questions and answers.

About us

Reduction Revolution Pty Ltd (ABN 74 141 672 764) is an Australian-owned company focused on energy efficiency and sustainability.

Since 2010 we have supplied thousands of customers with training, advice, monitoring, lighting, and innovative energy saving products.

You can read more about us here.

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