I'm sure my UK-based smart meter is RF-based, but you can hook it up to your wifi to link your energy account to it. The metres themselves have a 10m range (on

I'm sure my UK-based smart meter is RF-based, but you can hook it up to your wifi to link your energy account to it. The metres themselves have a 10m range (one for gas, usually outside, another for leccy, usually inside) so a receiver outside of that won't function.