I'm unsure where you have heard this? We're not charging for fitting smart meters. The only smart meters we're fitting at the moment are part of a number of trials we are currently running.
The installation of smart meters has been mandated by the Government - and it will be a legal requirement to have one fitted. www.decc.gov.uk/en/content/cms/consultations/smart_metering/smart_metering.aspx.
Smart meters will identify areas where savings can be made - saving money for the customer and energy - surely, isn't this a good idea?