MHHS and the Future of Energy Billing

The Market-Wide Half-Hourly Settlement (MHHS) programme is designed to revolutionise how energy is consumed, monitored, and settled across the country. As the UK embarks on this energy transition as part of its journey to Net Zero, MHHS will become a key enabler in our transition to a more flexible, cost effective and efficient energy system. It offers the potential to lower consumer bills while creating an energy market that better adapts to real-time demand. But for energy suppliers in England, Scotland and Wales, MHHS poses significant challenges. In this blog we explore why MHHS necessitates the urgent need for accurate and timely meter readings, and the repercussions of not meeting the required faster resolution time.

 

Key changes under MHHS

One of the most significant changes that the MHHS programme will bring when it is introduced in December 2026, is the reduction of the billing settlement window. Energy suppliers, who have previously operated with a 14-month settlement period, will now have only four months to reconcile energy usage. This shift requires operational overhauls, especially for settlements and metering teams, as the pressure to resolve discrepancies in a shorter time frame mounts.

 

The importance of accurate data

Without timely and accurate meter reads, suppliers may face increased reliance on the Supply & Volume Allocation (SVA) system, where Grid Supply Point (GSP) correction factors come into play. This could lead to suppliers paying for more energy than their customers actually consume - a costly inefficiency that needs addressing.

 

BFY Group estimates that, as a result, suppliers may overpay by up to 8% under the new system.1 The reason? Suppliers often overestimate energy usage, relying on Estimated Annual Consumption (EACs) in the absence of actual meter readings. Currently, suppliers can take up to 14 months to correct these estimates, but with the new window reduced to just four months, there’s a risk of overpaying due to incomplete data.

 

Suppliers who excel in this new landscape will be those with robust data collection systems, especially in gathering actual consumption data through smart meters. High smart meter penetration and a strong settlement performance will become essential competitive advantages.

 

The role of Calisen Metering Services (CMS) in MHHS

For energy suppliers navigating these upcoming changes, partnering with data collection experts is key. Calisen Metering Services (CMS), formerly known as Lowri Beck, offers a wealth of experience in meter reading and data retrieval. Since 1997, we have been providing end-to-end dual-fuel utility support solutions for gas, electricity, and water markets.

 

With over 600 dedicated meter readers and an annual total of more than 4 million site visits, we provide extensive coverage across Great Britain. Our team is well-equipped to support suppliers through this transition, offering both cyclical and non-cyclical meter reading services, and we tailor our approach based on read type and frequency to meet the unique needs of each supplier’s meter reading strategy.

 

Preparing for the future: Meter reading services for MHHS

To help suppliers prepare for MHHS, we offer a variety of data collection services for both smart and non-smart meters. These services include cold calls, appointment visits, pedestrian meter reading, safety inspections, and customer-read verification. Additionally, we provide a convenient online portal where customers can book appointments for meter readings.

 

Our readiness for the MHHS transition extends beyond just data collection. We are deeply involved in ensuring a smooth shift from Data Retriever to Meter Read Services (MRS). Many of our meter readers have been upskilled to assist with other crucial tasks, such as meter commissioning, communication hub reboots, and SIM swaps. This means we can help resolve issues with non-communicating smart meters, essential to the challenge of obtaining accurate meter readings. 

 

Furthermore, every meter reading visit includes a visual inspection of the meter. This additional layer of service ensures that any signs of interference, damage, or unsafe conditions are reported to the relevant Distribution Network Operator (DNO).

 

Conclusion

The shift to Market-Wide Half-Hourly Settlement will challenge energy suppliers to rethink their operational strategies, particularly when it comes to accurate meter reading and settlement performance. Those who can stay ahead of the curve by maximising their smart meter penetration and improving data collection will emerge as winners in this evolving market.

 

Calisen Metering Services offers the expertise, scale, and solutions necessary to help energy suppliers navigate these changes seamlessly. From data retrieval to enhanced meter services, we are poised to play a key role in supporting the UK’s energy transition and helping suppliers thrive in a more flexible, net-zero-focused future.

 

How will you maximise meter read collection and ensure you’re not over paying for your energy when MHHS comes into practice?  Get in touch today to find out more about Calisen Metering Services and join the 50 domestic and non-domestic energy suppliers we are already supporting. 

 

Source ref: https://www.bfygroup.co.uk/blog/mhhs-could-pose-a-major-commercial-risk-for-suppliers