MP184 Increase smart capability of SMETS2 Twin Element ESME to support solar and storage use cases

Currently, the SMETS2 defines how a twin element ESME captures and records electricity consumption on a per element basis. The twin element ESME measures and records the energy imported and exported on the primary measurement element, whereas the secondary measuring element records imported energy but is not mandated to record export active energy consumption. To support greater energy efficiency and cost saving the Proposer would like to offer products and services that require export registers on the secondary element. This would enable the Smart Energy industry to support innovative products and services for management of battery storage and solar solutions, independently from the supply via the primary element.