OVO has announced that it is ending support for THTC in March 2023 (after having taken over part of SSE) so the radio controlled operation of “passive” storage heaters and hot water will no longer be available. There is also a knock on effect to focal point fires, showers, towel rails and panel heaters. Since OVO is actively changing how a THTC system was originally designed then should OVO simply change only the meters and leave householders with the legacy of old heaters or should OVO change meters and provide, at no cost to the householder, new, up to date storage and panel heaters with inbuilt timers so that householders can control their heaters?
Best answer by Tim_OVO
Yep great question thread this one - thanks for posting
This page is really worth a look:
I’ve actually written a guide about the RTS Shutdown previously, which you can find at
And this advice is also spot on:
In theory, there are ways to migrate heating systems that were controlled via RTS Meters to Smart Meters, provided they’re all wired up properly. Five-Terminal SMETS2 Smart Meters exist for this exact purpose. However, OVO can’t go about replacing equipment that was never installed by OVO or even SSE - they’re only able to replace the equipment that comes in scope. There’s more info on this in Transparent‘s excellent guides over at
SSE also outlined, here, that their support of this tariff and meter system will end soon, but they’ll reach out to you directly to discuss a smart meter system replacement that fits your needs. I’ve spoken to the team that arrange these, and (as you can imagine with COVID delaying meter exchanges) there’s a lot of work happening here.
In the meantime, for any technical issues relating to this meter, tariff or heating, call them directly on: 0345 071 7972.
Hope this helps!