Meter Operator
The licensed entity that owns, installs and maintains a half-hourly electricity meter; contracted separately from the energy supplier.
The Meter Operator (MOP) is the licensed entity that physically owns, installs, commissions and maintains a half-hourly electricity meter, the associated communications equipment and any current transformers. For HH supplies, the MOP contract is separate from both the energy supply contract and the data-collection / data-aggregation contract, and is signed directly with the customer.
MOP services include:
- Initial installation, commissioning and certification of the meter.
- Routine maintenance and re-certification on the regulatory cycle.
- Fault response when the meter fails or loses communication.
For non-half-hourly profile-class supplies, the meter is owned by the supplier or the supplier's appointed MOP under a bundled arrangement, and the customer is not generally involved in the MOP contract directly.
In procurement, two issues arise routinely. First, when a half-hourly site changes energy supplier, the MOP contract does not transfer automatically — it must either be retained, novated or replaced. Second, MOP charges vary materially between providers, and tendering the MOP contract independently of the energy supply contract typically produces savings that are easier to lock in than energy-side savings, because the MOP market is small and pricing is relatively transparent.
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Data Collector / Data Aggregator
DC / DAThe licensed entities responsible for collecting half-hourly meter readings (DC) and processing them for industry settlement (DA).
Read definitionHalf-Hourly Metering
HHThe metering and settlement regime in which electricity consumption is measured and settled in 30-minute intervals; mandatory above 100 kW measured maximum demand.
Read definitionMarket-wide Half-Hourly Settlement
MHHSThe Ofgem programme to extend half-hourly settlement to all UK electricity customers, leveraging smart-meter data; phased delivery through the late 2020s.
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