If you’ve been reading this blog for some time now, you’ll be aware that, in March last year, our smart electric meter stopped being smart. It’s now fixed, and we have a new 4G communications hub too.
For some reason, that even now we’re not entirely sure of, no regular readings were being set back to our energy supplier. This meant that we had to take manual readings, which was a pain – our meter is in a cubby hole under the stairs in our cellar, behind our tumble dryer. We get our energy from Octopus (referral link), and although they tried various things at their end, after a few weeks, it was determined that we needed an engineer visit.
Unfortunately, this has coincided with the shutdown of the Radio Teleswitch service, which controls older Economy 7 meters. This means that, nationally, there’s huge demand for engineer visits to replace these older meters with newer smart meters. Whilst the shutdown should have happened last year, it’s been delayed and will (probably) happen this year. As such, it took until January for us to finally get an engineer visit.
The Communications Hub
It turns out that the electricity meter itself was fine. The issue was in the Communications Hub; if you have smart meters, then you’ll typically have:
- An electricity meter
- A gas meter (if you have mains gas)
- A communications hub, which sits on top of the electricity meter and manages the home connection and the link with your energy supplier
- An In-Home Display (IHD) which displays your usage
- Some Octopus customers also have an Octopus Home Mini which sends your usage data over your Wi-Fi connection in real-time.
All these talk to each other using a private Zigbee mesh network. The Communications Hub then sends data to your energy supplier using one of three methods:
- If you live roughly south of the M62, then it’s sent over O2’s 2G or 3G data network.
- If you live roughly north of the M62, then it’s sent over a lower frequency 400 MHz radio data network operated by Arqiva.
- Or, if you have a newer communications hub, it’ll use Vodafone’s 4G network, and these are installed nationally.
4G migration
We originally had the second type, but now we have the third type which uses 4G. And it’s been working fine since the engineer installed it back in January, which is a relief. We’ve also noticed that it has a better connection with our IHD; before, it would periodically lose connection and wouldn’t show live data.
Plus, the new 4G communications hub is more future proof. If you have an older smart meter communications hub that uses 2G or 3G, then at some point in the future, your energy supplier will need to replace it. Of the four big networks, O2 is the only one still offering 3G at the time of writing. In fact, it may have already been switched off by the time you read this.
The slower 2G networks will be around a little longer, but the plan is that they too will be switched off in 2033. So, if you live in central and southern England, or in Wales, and have a smart meter, then sometime in the next 7 years, an engineer will need to come over and replace your Communications Hub. It should only take about an hour, and, at least in our case, there was no interruption to our electricity supply whilst the work was being done. There are no plans to shut down the 4G networks any time soon; according to this web site, Vodafone’s 4G contract runs until 2038.
If you live in the North of England or Scotland, then your current communications hub should carry on working. However, if you are having connection problems, then a 4G communications hub may work better.
Meanwhile, I’m just relieved that we don’t have to do any more manual readings.









