General Energy Terms
BSC: Balancing and Settlement Code
The legal document setting out the rules for the operation and governance of the Balancing Mechanism and Imbalance Settlement.
CERT: Carbon Emissions Reduction Target
A government target for reducing carbon emissions through energy efficiency improvements.
CRM: Customer Relationship Management
A system for managing a company’s interactions with current and potential customers.
DCC: Data and Communications Company
The company that manages the data and communications to and from smart meters.
Elexon: N/A
The company that manages the Balancing and Settlement Code (BSC) for the electricity market in Great Britain.
EMS: Energy Management System
A system for monitoring, controlling, and optimising the performance of the generation and/or transmission system.
EPC: Energy Performance Certificate
A certificate that rates the energy efficiency and environmental impact of a property.
ESOS: Energy Savings Opportunity Scheme
A mandatory energy assessment scheme for large organisations in the UK, requiring audits of energy use and efficiency.
FIT: Feed-in Tariff
A government scheme that pays small-scale renewable energy generators for the electricity they produce and export to the grid.
MRA: Master Registration Agreement
The now-defunct multi-party agreement between electricity suppliers and distribution companies to govern the essential interactions. This no longer exists, and has been replaced by REC.
NDRHI: Non-Domestic Renewable Heat Incentive
A government scheme that provides financial incentives for renewable heat generation in non-domestic buildings.
Ofgem: Office of Gas and Electricity Markets
The government regulator for the electricity and downstream natural gas markets in Great Britain.
REC: Retail Energy Code
The REC is the main framework for governing Great Britain’s retail energy market. It standardises processes for supplier switching, metering, and data management to streamline operations across the sector.
REGO: Renewable Energy Guarantee of Origin
A certificate that guarantees the electricity generated is from renewable sources.
ROC: Renewable Obligation Certificate
A certificate issued to operators of accredited renewable generating stations for the eligible renewable electricity they generate.
SPAA: Supply Point Administration Agreement
An agreement that sets out the inter-operational arrangements between gas suppliers and transporters in the UK retail market.
TPI: Third Party Intermediary
An intermediary company that facilitates transactions between energy suppliers and end-users.
Electric Terms
ADS: Advanced Data Services
The ‘Qualified’ service that provides the Advanced Retrieval and Processing Service.
DA: Data Aggregator
A party responsible for aggregating meter readings for submission to the settlement process.
DC: Data Collector
A party that retrieves and processes consumption data from meters for settlement purposes.
FSP: Full Settlement Participant
A market participant that is fully settled in the electricity market.
HHDC: Half-Hourly Data Collector
A party that retrieves and processes half-hourly consumption data from meters.
HHDA: Half-Hourly Data Aggregator
A party responsible for aggregating half-hourly meter readings for submission to the settlement process.
HHMO: Half-Hourly Meter Operator
A party responsible for installing and maintaining half-hourly meters.
HHS: Half-Hourly Settlement
The process of settling electricity supply and demand on a half-hourly basis.
MDD: Market Domain Data
The central repository of reference data used by participants in the electricity market.
MDR: Market Data Repository
A centralised database for storing and managing market data related to energy consumption and transactions.
MDS: Market Data Services
Services that provide market participants with access to market data and reports.
MEM: Meter Equipment Manager
A party responsible for the installation and maintenance of meters.
MHHS: Market-wide Half-Hourly Settlement
Utilises smart meters to record usage during each half-hour period, allowing for more accurate billing and settlement.
MOP: Meter Operator
A company responsible for installing and maintaining electricity meters.
MPAN: Meter Point Administration Number
A unique identifier for electricity supply points used in the UK.
MPAS: Meter Point Administration Service
A service provided by distribution companies to manage MPANs and associated data.
MS: Metering System
The system comprising the meter and associated equipment used to measure energy consumption.
MRS: Meter Reading Service
A service that collects meter readings from customer premises.
NGESO: National Grid Electricity System Operator
The system operator for the electricity transmission network in Great Britain.
NHH: Non-Half-Hourly Settlement
The process of settling electricity supply and demand on a non-half-hourly basis.
NHHDA: Non-Half-Hourly Data Aggregator
A party responsible for aggregating non-half-hourly meter readings for submission to the settlement process.
NHHDC: Non-Half-Hourly Data Collector
A party that retrieves and processes non-half-hourly consumption data from meters.
NHHMO: Non-Half-Hourly Meter Operator
A party responsible for installing and maintaining non-half-hourly meters.
SCR: Significant Code Review
A process initiated by Ofgem to review and, if necessary, modify energy codes to deliver significant improvements.
SEC: Smart Energy Code
The code that sets out the rights and obligations for the management and operation of smart metering in Great Britain.
SMRS: Supplier Meter Registration Service
The service provided by suppliers for registering and managing meter points.
SP: Settlement Period
The half-hour time period used for electricity settlement.
STC: System Operator Transmission Owner Code
The code governing the relationship between the transmission system operator and transmission owners in the UK.
UEPT: User Entry Process Testing
The testing process required for new participants to enter the electricity market.
Data Terms
ADS: Advanced Data Services
The ‘Qualified’ service that provides the Advanced Retrieval and Processing Service.
DC: Data Collector
A party that retrieves and processes consumption data from meters for settlement purposes.
DA: Data Aggregator
A party responsible for aggregating meter readings for submission to the settlement process.
FSP: Full Settlement Participant
A market participant that is fully settled in the electricity market.
HHDC: Half-Hourly Data Collector
A party that retrieves and processes half-hourly consumption data from meters.
HHDA: Half-Hourly Data Aggregator
A party responsible for aggregating half-hourly meter readings for submission to the settlement process.
HHMO: Half-Hourly Meter Operator
A party responsible for installing and maintaining half-hourly meters.
HHS: Half-Hourly Settlement
The process of settling electricity supply and demand on a half-hourly basis.
MDD: Market Domain Data
The central repository of reference data used by participants in the electricity market.
MDR: Market Data Repository
A centralised database for storing and managing market data related to energy consumption and transactions.
MDS: Market Data Services
Services that provide market participants with access to market data and reports.
MEM: Meter Equipment Manager
A party responsible for the installation and maintenance of meters.
MOP: Meter Operator
A company responsible for installing and maintaining electricity meters.
MPAN: Meter Point Administration Number
A unique identifier for electricity supply points used in the UK.
MPAS: Meter Point Administration Service
A service provided by distribution companies to manage MPANs and associated data.
MS: Metering System
The system comprising the meter and associated equipment used to measure energy consumption.
MRS: Meter Reading Service
A service that collects meter readings from customer premises.
NHHDA: Non-Half-Hourly Data Aggregator
A party responsible for aggregating non-half-hourly meter readings for submission to the settlement process.
NHHDC: Non-Half-Hourly Data Collector
A party that retrieves and processes non-half-hourly consumption data from meters.
NHHMO: Non-Half-Hourly Meter Operator
A party responsible for installing and maintaining non-half-hourly meters.
NHH: Non-Half-Hourly Settlement
The process of settling electricity supply and demand on a non-half-hourly basis.
NGESO: National Grid Electricity System Operator
The system operator for the electricity transmission network in Great Britain.
STC: System Operator Transmission Owner Code
The code governing the relationship between the transmission system operator and transmission owners in the UK.
SEC: Smart Energy Code
The code that sets out the rights and obligations for the management and operation of smart metering in Great Britain.
SMRS: Supplier Meter Registration Service
The service provided by suppliers for registering and managing meter points.
SP: Settlement Period
The half-hour time period used for electricity settlement.
SCR: Significant Code Review
A process initiated by Ofgem to review and, if necessary, modify energy codes to deliver significant improvements.
UEPT: User Entry Process Testing
The testing process required for new participants to enter the electricity market.
Gas Terms
CM: Capacity Market
A mechanism to ensure the supply of electricity continues to meet demand as the system decarbonises.
GEMA: Gas and Electricity Markets Authority
The governing body of Ofgem, responsible for regulating the gas and electricity markets in Great Britain.
GDN: Gas Distribution Network
The network of pipelines that distribute gas from the transmission system to consumers.
GASMAN: Gas Management System
A system for monitoring, controlling, and optimising the performance of the gas transmission system.
LNG: Liquefied Natural Gas
Natural gas that has been cooled to liquid form for ease of storage and transport.
NTS: National Transmission System
The high-pressure gas pipeline system in the UK used for the transmission of natural gas.
REGMAN: Regulation Management
Systems and processes used to ensure compliance with regulations in the energy market.
UNC: Uniform Network Code
The framework for the transportation and trading of gas across the UK gas network.