How do I install a Smart Relay device?

It’s quick and easy to set up a Smart Relay device, and it will help your smart gas and electricity meters talk to each other if they’re too far apart.

Once you’ve unpacked your Smart Relay device, just plug it into a power socket – but don’t switch it on yet. The socket should be as close as you can manage to halfway between the gas and electricity smart meters so it can pair them successfully.

Don’t worry if the socket is already in use for another appliance or device. The Smart Relay has another socket, so you can simply plug the appliance into that.

Before you turn on the Smart Relay, please call us on:

  • 0800 5999 440 if you’re a PAYM customer.

  • Or 0800 358 3523 if you’re a PAYG customer.

We’ll send a message to your electricity smart meter to put it into ‘search mode’ so it looks for your Smart Relay. You can then:

  • Switch on the plug socket. A red light will come on just beneath the long black button at the top of the Smart Relay.

  • Hold down the black button for around 15 seconds.

  • The red light should start flashing.

  • The light will then stop flashing and turn off – that means it’s linked to your Home Area Network (HAN), and your gas and electricity meters should now be able to communicate with each other.

What happens if I turn the Smart Relay off?

If you switch off the Smart Relay, any devices currently outside the electricity meter’s range will stop talking to it. For example, if you have an In Home Display (IHD), it will stop providing you with real-time information until you move it within range of the electricity meter or switch the Smart Relay device back on.

Please note that turning off the Smart Relay does not reset it.
What do the lights on the Smart Relay mean?

Solid red light: the Smart Relay is in standby mode. It isn’t currently connected to a Home Area Network (HAN) and it’s not searching for one to link with.

Flashing red light: the Smart Relay is in search mode. It’s searching for an open Home Area Network to join.

No light: the Smart Relay is now ‘commissioned’. That means it has successfully joined the Home Area Network and is now communicating with your electric meter.

I plugged in my Smart Relay but the red light didn’t come on. What should I do?

If you’re plugging in your Smart Relay for the first time and the red light does not light up when you switch it on, please try plugging it into a different socket. If the red light still doesn’t come on, please email us at and one of our advisers will get back to you as soon as possible.
What should I do if my Smart Relay stops working?

Have you recently re-positioned your Smart Relay? You may have accidentally moved it out of range of the electric meter, so the two devices are no longer communicating. Try moving the device closer to the electric meter.

If that doesn’t work, please email us to let us know there may be a problem.

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