My brother's flat has off peak storage heaters and a timer on the hot water cylinder. 2 year ago a smart meter was installed since when 7700kWh have bee used on rate 1 an 92kWh on rate 2., that equate to 1 kWh per week!
The meter has two fat live tails coming out, one to a normal MCB board and one to the Off Peak MCB board.
Any ideas what is going on?