https://en.wikipedia.org/wiki/Radio_teleswitch https://en.wikipedia.org/wiki/Radio_teleswitch > This includes switching between 'peak' and 'off-peak' meter reg

https://en.wikipedia.org/wiki/Radio_teleswitch https://en.wikipedia.org/wiki/Radio_teleswitch > This includes switching between 'peak' and 'off-peak' meter registers as well as controlling the supply to dedicated off-peak loads such as night storage heating 1980's technology, recently switched off, I presume for internet based alternatives. The exact same principle applies, beats batteries as hot water tanks and storage heaters already exist.