An implementation has the following requirements: Many customers are installing their own solar electrical generation equipment. When these customers generate more electricity than required for their own use, the surplus can be exported back to the power grid. To measure this generation, the utility has installed special scalar devices at customers' premises. These devices have separate registers to measure the energy generated (export) and the energy received (import) from the power grid. Both types of read will be stored in kWh, but the import is subtractive and export is consumptive. Which solution should an implementation choose to configure the measuring component types for these specific requirements?
