Many houses with economy 7 have 2 element meters with both a meter and a radio switch. My house had one. They look like this:
Source: Blastoise186 on ovo energy forum
These radio teleswitches are used to tell the meters when to switch between rates. A bit like a 1 way smart meter. Thing is, the RTS network phased out by a deadline of December 2023, meaning that existing installations would end up stuck on 1 rate.
Energy UK says:
“The majority of the preparation for the transition lies firmly with electricity suppliers
themselves, ensuring they are able to source the necessary meters and upskilling their installation workforces to replace all legacy RTS metering installations by the 31st March 2022 deadline.”
Given that bulb still doesn’t have proper stock of the 5 terminal smart meters, and that the only alternative is to “install standard 4-terminal SMETS2 meters alongside an external
contactor in the absence of 5-terminal/twin element SMETS2 variants.” which seems fine until you read “However, it is noted that such installations are deemed to be more technically difficult which may be beyond the capabilities of a less-experienced smart meter installation workforce” Which siemens definitely fall under, what are bulb planning to do about this?