Your Market-wide Half Hourly Settlement (MHHS) Questions Answered
What is MHHS and how is Shell Energy preparing for it?
A: The Market-Wide Half-Hourly Settlement (MHHS) programme is an industry-led initiative designed to modernise how electricity usage is measured and settled across the market. By recording and settling energy use every half hour, MHHS will provide a more accurate and timely view of consumption.
A: Yes, Shell Energy is on the official path to MHHS qualification in line with Ofgem’s delivery plan.
A: We’re in Wave 3 and will migrate all portfolios between August 2026 and May 2027. Migrations will start small and grow steadily to minimise disruption.
A: MHHS readiness is a key priority. A multi-year project team, supported by senior leadership, is developing cross-departmental solutions and working closely with Ofgem, system providers, and industry stakeholders to meet all required standards and deadlines.
Will MHHS change my contract or pricing?
A: Contracts already include provisions for regulatory changes. We’ll update documentation as needed to align with MHHS requirements.
A: We endeavour to keep any changes to a minimum and ensure full continuity of your current terms. If any updates are required, we’ll inform you well in advance.
A: We will endeavour to maintain customer pricing or contractual terms before contract end dates, provided the product structure remains supported.
A: Yes, our terms and conditions allow price or charge changes if required by regulation. We’ll always endeavour to keep any impact minimal.
A: Some Non Half-Hourly (NHH) meters may incur an availability charge post migration which we reserve the right to charge onto customers
How will I be kept informed about MHHS changes?
A: Customers shouldn't notice much immediate impact from these changes. We'll keep you informed through regular updates on our website and blogs. If any changes are likely to affect you directly, we'll contact you in advance by email or through your account manager.
How will my meter and energy account be affected?
A: Migrations will take place in waves to ensure a smooth transition. NHH meters will be updated to enable half-hourly settlement where required.
A: No action is required. We’ll communicate directly with affected customers and brokers ahead of any changes.
A: Our portfolio includes a mix of meter types, so upgrade needs will vary:
Traditional meters: Currently NHH. We’ll offer or recommend upgrades to enable HH capability.
Smart meters: Currently NHH. We plan to move new acquisitions and renewals to HH contracts after qualification which will not require a meter upgrade.
Advance meters: A mix of HH and NHH. After qualification, all new quotes and renewals will move to HH, and some upgrades may be required.
What will happen to my data under MHHS?
A: Yes. Where half-hourly data is available, you can view insights and reports through the Shell Energy self-service portal.
A: Yes. These responsibilities will move to new market roles under MHHS, but you won’t need to take any action.
A: No. We’ll continue to follow strict GDPR and data privacy standards. Only authorised parties will have access to your data.
Still got questions?
Speak to our experts at seukl-mhhs-queries@shell.com