Market-wide Half-Hourly
To find out more, please visit the Market-wide Half-Hourly Settlement website here.
Find more info here
On 20th April 2021, OFGEM (Office of Gas and Electricity Markets) published the decision to implement Market-wide Half-Hourly Settlement (MHHS).
The Market-wide Half-Hourly Settlement programme is an Elexon led initiative that will bring the most significant change in how electricity is being used and accounted for since the introduction of the non-half hourly market in 1998. At TotalEnergies Gas & Power, we are gearing up to be ready for the changes.
Set to be implemented in 2026, Market-wide Half-Hourly Settlement will introduce site-specific reconciliation using half-hourly data, ensuring a faster & more accurate settlement process for all market participants. In turn, providing greater transparency & accuracy in the measurement of energy usage & billing to better support businesses managing their energy consumption.
Market-wide Half-Hourly Settlement is a key enabler for a smarter, more flexible energy system, vital in supporting flexible solutions for the UK's transition to Net Zero by 2050. The programme aims to change consumer behaviour which will decrease our carbon footprint by reducing demand on the grid at peak times and the need for expensive generation capacity.
No action is required for our customers. As your supplier, TotalEnergies Gas & Power will manage the industry changes and inform you if there is anything that you need to be aware of. For further information, read our FAQs below.
Half-Hourly Settlement for UMS Metering Supplies (P434)
Find out more about the change, the drivers, what you need to do, benefits, and impacts of the modification.
FAQs
Market-wide Half-Hourly Settlement is an initiative that will bring the most significant change in the Power industry for the past two decades. The programme will introduce a site-specific reconciliation using half-hourly data, resulting in a faster & more accurate settlement process.
No, there is no impact to Gas customers. Market-wide Half-Hourly Settlement only impacts the Power industry.
No, all industry facing changes will be handled by TotalEnergies Gas & Power. If there is anything that you need to be aware of, we will contact you. In the meantime, if you are a customer of ours and would like to view your half-hourly consumption data, please do so by requesting it.
According to the current industry plan, Market-wide Half-Hourly Settlement will come into effect from December 2026. The current industry plan can be found here.
Currently for meters that are not CT or UMS, this remains a customer's choice alongside a suppliers capability, however, in readiness for MHHS migration, we strongly recommend that you install a smart / advanced meter.
The timeline for meters to be settled HH is in line with Market-wide HH Settlement (2026), however, for CT and UMS new connections, regulation states that any new connection installed after 1st October 2023 must be HH settled.