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Rank 8
May 28, 2025
Solved

Can a smart meter install disrupt your broadband connection and mobile signal?

  • May 28, 2025
  • 27 replies
  • 1124 views

Had a new smart meter fitted, right afterwards, our broadband ADSL wasn’t working and mobile phones, for 2 hours.

Coincidence, or does the meter produce a burst of data when its first plugged in that swamps the local area with interference ?

Best answer by Nukecad

….. varioius wifi items around the house have been playing up a little, for a little while and then fine again.

That can happen with IoT devices.

The Zigbee HAN signal that connects your meters and IHD is on 2.4 GHz.
As mentioned above that is the same as the wifi connection of most IoT devices.

However that’s a totally different band to the WAN signal; that sends the meter readings by Long Range Radio or 3G/4G. So it shouldn’t be interfereing with wifi or IoT devices.

As PererE goes into above the way round it is to seperate the chanels that Zifbee and 2.4 Ghz ToT devices are using.

If you want some technical advice on keeping 2.4 GHz Zigbee and 2.4 GHz wifi IoT on sepearte channels there is an overwhelming selection on the web.
Unfortunately it is all pretty technical, it’s not really a subject that can be simplified.
This seems a decent one:
https://www.metageek.com/training/resources/zigbee-wifi-coexistence/

 

As for the rest ???  As you say it may well be just coincidence.
There are a lot of changes going on up there with phone signals and new 4g masts, the RTs switch off, etc. all happening at the same time (and all in a hurry) so it would be surprising if there weren’t some clashes while it’s happening.

27 replies

Emmanuelle_OVO
Retired Moderator
Retired Moderator
June 2, 2025

Hey ​@shetland,

 

Is this now resolved? Did we get to the bottom of it? 😊 I can see some helpful suggestiong from our community members!

 

 

Renewable Energy? Big Fan.
shetlandAuthor
Rank 8
June 2, 2025

I’ve left it connected for now, the interference with other wifi/etc. units in the house appears to have disappeared, so hopefully everything has decided which channel is best.

Not done exhaustive testing yet, been busy with other stuff, but it is better at first glance. ( Alexa has stopped stuttering for example. )

If it doesn’t settle down completely, I’ll just unplug it.

I did ponder a signal checker, but since those are super expensive, like £1,000 I decided the cheaper option would be just to unplug it, if things are too much of an issue. :-)

I notice at the moment, the unit itself, is a bit wonky when it comes to giving you daily cost figures, eg. during the day it slowly creaps up in cost, then, come midmight, suddenly the price jumps and yesterdays is not what it said it was 5 minutes ago !

Check a few hours later, and it seems to have changed its mind again, this time giving what apears to be more realistic figures for yesterday and the day before.

I think I read someplace, that takes a while to settle down too, eg. months.

So its semi useful for letting you tweak your heating settings between, I can afford it but its not very warm, to I can’t afford it and its quite warm !

A barmy 12c here during the day, and 9c at night, so heating is very much still needed.
 

Peter E
Super User
Super User
June 2, 2025

If you do put it in Freecycle or recycle please do the factory reset which you can do from a menu or quite often you can poke an unfolded paper clip (will these become extinct?) in the small hole usually at the back.

 

My second hand EV came with a whole load of information in the infotainment system including where the car was parked at night, names and numbers in the phone directory and places set up in the satnav that the garage didn't clear. Oops!

 

Reducing my yearly fossil fuel usage with an EV (-900 litres petrol), A2AHP (-8,700 kWh gas) and Timed Immersion heater (-1,500 kWh gas)
Blastoise186
Super User
Super User
June 2, 2025

Just a heads up.

Please don't throw out your IHD! If you move out, the next resident will need it.

If you really don't want to use it, I recommend you just put it away in a cupboard. 

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Emmanuelle_OVO
Retired Moderator
Retired Moderator
June 3, 2025

Hey ​@shetland,

Just wanted to add this really helpful webpage: https://www.ovoenergy.com/help/article/in-home-display-troubleshooting

It’s important to remember that while the IHD is a helpful tool (provided it’s working as it should), you’re billed based on the smart meter readings. So if the IHD is showing innacurate information, this won’t necessarily affect your bills provided your smart meter is sending us readings.

Renewable Energy? Big Fan.
shetlandAuthor
Rank 8
June 3, 2025

Talking of IHD’s, it appears I got a  IHD3 model with my new smart meter install the other day, would the better version IHD6 V2 be able to replace it without issues with the smart meter itself ?

Or is the IHD3 the best that specific smart meter can match with ?

If a  IHD6 V2 is possible, can I just get one cheap off Ebay and use it ?

Blastoise186
Super User
Super User
June 3, 2025

You can use any IHD that OVO provides and can mix and match them - up to four can be active at once without issue.

What you can’t do, however, is grab one off of eBay and try to use that - those ones are banned because they’re from unauthorised sources and are technically “stolen” as they remain property of the supplier, not the customer or whoever is flogging them on eBay.

You do have options though!

 

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!