Buying a house that has a mechanical meter with rotating dials that then branches into two modernish digital meters (not Smart), one for economy 7 and the other for the rest of the electrics. I only want a single tariff so if I have a Smart Meter fitted for free I assume they will take all three meters away and just connect the two separate fuse boxes on to the Smart Meter but looking at online pics I only ever see two wires shown as coming out of the Smart Meter to the domestic fuse box. I wont have the funds to upgrade the electrics to a single trip consumer unit until later. BTW anyone know the maximum ampage that a Smart meter is rated for as I will want two electric showers and cooker in the future (but the economy 7 heaters will be removed for gas).