I'm looking to fit an EV charger in the future but first have to change to Smart meters. I’ve put it off so far as I have concerns that the meters won’t be able to communicate with each other and/or externally due to their locations and hoped the technology would improve with time.
The gas meter is in the garage on the original outside wall whilst the electricity meter is in the opposite corner of the property, in an upstairs bedroom cupboard. As such there is ~12m between them, two thick brick walls, a ceiling and two wooden doors.
I had hoped that prior to the installation a signal check would be performed to check that both the HAN and WAN would work to allow the Smart meters to be ‘Smart’, not dumb. From the various posts and articles I’ve read on here this doesn’t appear to be the case with many people posting how their meters were installed but don’t communicate and they’ve had to raise this as a problem and wait for various additional aerial, boosters and extenders to be tried, with varying degrees of success. I note some comments suggest adding information and photos during the Smart meter installation booking process, but ultimately there’s no way of knowing until you try it.
Do I need to book a separate technical site assessment (at my cost) to avoid the above situation ?

