The small display units need to sit close to the smart meters. Mine disconnect from time to time. If I’m honest I never look at them. So I’m that respect yes , waste of money . However assuming they work fine , you should see usage date , cost etc in an app ? I do on mine ? It lags by 24hrs .
I'd never even turned mine on until yesterday, although it has been in the house since we moved in (June 2020).
But I plugged it in and turned on yesterday, as we were having the solar panels installed. It connected just fine, even though the meter is nearly at the other end of the house, and it showed real time usage for both gas and electricity, and also showed totals for the day, week, month, year, and costs at the rate I am currently charged.
Once the solar was commissioned, it was showing the surplus with a different icon (and current cost as £0.00
).
It gives us the chance to monitor over the next few weeks until the battery arrive before deciding which SEG to go for - though Octopus are looking likely.