Tariff payments are made for the kWh produced and exported, so this needs to be measured
Meters will be needed to measure each of the three energy flows (generation, import and export).
However the whole country is changing over to ‘Smart Meters’ in the next few years, and they will be able to cope with all this.
The meters need to conform to particular requirements, which are detailed in Section 7 of the administrator’s guidance document (linked from this page).
To prevent the need for installing an additional export meter before Smart Meters are introduced, it will be possible to ‘deem’ the level of exports as 50% of the total generation of the system.
Generators who believe their exports are substantially higher than this will be allowed to install suitable export meters and be paid on the metered level of exports.
The requirement for providing these readings will vary for different suppliers.
Once Smart Meters are introduced the meters can be read remotely and some companies already offer this service.
Otherwise your supply company may arrange for the meter reading or they may ask energy users to provide the readings.