If in the future I switch to another supplier who does not yet support smart meters, will the meter still show Pure Planet as my supplier and will the tariff be updated in the meter? What will or won't work on the In Home Display at that point?
If I have different suppliers for gas and electricity, how does the smart meter system cope with this?
Best answer by MrSmart
You're right, SMETS2 meters are designed to be fully inter operable with all domestic UK suppliers. All UK suppliers were mandated to be DCC Users by November 2017 but unfortunately there are still a lot out there that are incapable of servicing them.
This doesn't mean that your meter won't continue to function if you switch but it does mean that the smart capability will no longer be useful (i.e. the new supplier won't be able to obtain remote readings and they won't be able to change the settings on the meter; your IHD will therefore just display the old details - prices and supplier information).
Most suppliers would leave the IHD in situ rather than replacing with their own (there are only really 2 manufacturers anyway so chances are the new supplier is using the same display device as the previous one). The IHD isn't actually the one that contains the information so there would be no point in replacing the unit because the information is pulled from the meters (it is that which needs to be overwritten by the incoming supplier). As you say
Regarding the point about shared suppliers - the system was absolutely designed for this very purpose (so consumers have the choice of having both fuels with the same or different suppliers). In this regard the suppliers 'share' a display device and the IHD will just pull the information from their respective meters as updated by the suppliers independently. They could give you an IHD each but that would be a bad customer experience as you would have to know which one was your gaz and which your leccy.
Hope that helps.
Remember to point all your smart meter queries my way