AA Annualised Advance

AAHEDC Assistance for Areas with High Electricity Demand Costs

AAU Assigned Amount Units

ACI Air Conditioning Inspection

AD Anaerobic Digestion

AE Active Export

AEIp Actual Energy Indebtedness

AES Advanced Encryption Standard

AGR Advanced Gas Cooled (nuclear) Reactor

AHU Air Handling Unit

AI Active Import

AMICoP Approved Meter Installer Code of Practice

AMR Automatic Meter Reading

ANM Active Network Management

AQ Annual Quantity

ARD Agreed Read Dispute

ASC Available Supply Capacity

ASHP Air Source Heat Pump

ASP AMR Service Provider

ASSPR Asset Provider

AUGE Allocation of Unidentified Gas Expert