First generation smart meters (SMET1) supported accurate billing however, they are not always compatible with other energy supplies. So when you switch suppliers, this type of smart meter may lose functionality. The DCC (Data Communications Company) are working closely with energy companies to migrate SMETS1 meters. When complete, many more consumers will enjoy the full benefit of their smart meter. You can learn more about this, here.
Second generation smart meters (SMETS2) support accurate billing and are compatible across the industry, so you can switch suppliers with ease and keep your smart meter, without losing any functionality. We only offer these types of smart meters to our customers.