MHHS explained: what market-wide half-hourly settlement means for your business
Market-wide Half-Hourly Settlement is moving every meter in Great Britain to half-hourly settlement. Here are the key dates, the new MSA, ADS and SDS roles, and a…
Swansea
Half-hourly electricity and metering in Swansea
Half-hourly electricity help for businesses in Swansea: independent contract comparison, line-by-line bill checks and meter and data support from a specialist broker – for single sites and multi-site portfolios across South Wales.
Call 07565 147 170 or send us a bill for a free check.
Half-hourly electricity for Swansea businesses
Wales' second city, Swansea has a broad economy built on education, healthcare and public services, including Swansea University's two campuses, large hospitals and the DVLA's headquarters at Morriston. The Port of Swansea and Swansea Enterprise Park support manufacturing, distribution and trade businesses, while the SA1 waterfront and city centre host offices, retail and hospitality. Tourism around Mumbles and Gower adds seasonal demand.
For schools, care homes, public buildings and factories, the timing of electricity use matters as much as the amount. On a half-hourly supply every 30 minutes is metered and priced, so a site that runs machinery, chillers or heating through the late-afternoon peak pays very differently from one that does most of its work overnight.
Your local electricity network
Swansea is in the South Wales distribution area run by National Grid Electricity Distribution. If your site is supplied from that network, the bottom line of the MPAN on your bill starts with 21.
DUoS unit charges here follow red, amber and green time bands. The red band runs 17:00–19:30, Monday to Friday, and every kWh used in it carries the highest network charge. Green, overnight and at weekends, is the cheapest.
Half-hourly sites also pay a capacity charge for their Agreed Supply Capacity. If it was set years ago it may no longer match how the site runs – too high and you pay for capacity you never use, too low and excess capacity charges appear. Changes go through National Grid Electricity Distribution.
What we do for businesses in Swansea
Most of our work with local businesses falls into four jobs:
- Review your Agreed Supply Capacity and red-band use against twelve months of half-hourly data.
- Make sure your metering and data service contracts are in place and ready for MHHS.
- Compare half-hourly contracts from UK suppliers well before your renewal date, so you never fall onto out-of-contract rates.
- Check your bills line by line: energy rates, DUoS bands, capacity and excess capacity, reactive power, TNUoS, Climate Change Levy and VAT.
That includes industrial, commercial and public sites around Swansea Enterprise Park, Port of Swansea and SA1 Swansea Waterfront, as well as single shops and offices in the town centre.
We explain every option in plain English, show the figures from your own half-hourly data and tell you our fee, so the decision is always yours.
What MHHS means locally
Market-wide Half-Hourly Settlement is bringing smaller Swansea sites onto half-hourly settlement too, with every meter due to move by May 2027. Sites that are already half-hourly see new names for their metering and data agents and more reliance on actual readings. Our guide to understanding MHHS explains what to check.
A short review now saves trouble later: check for estimated reads on recent bills, find out who your metering and data agents are, and read how your contract treats industry and settlement changes before you sign the next one.
Free bill check for Swansea businesses
The quickest start is a recent bill. We check it against your half-hourly data, ask suppliers to quote like for like and show you the options side by side. Request a free quote or call 07565 147 170.
Our services for businesses in Swansea
- Half-Hourly Electricity Contracts Compare half-hourly electricity contracts from a range of UK suppliers, with fixed, pass-through and flexible options explained clearly so you can choose with confidence.
- Contract Renewals & Switching Renew or switch your half-hourly electricity contract on time, avoid costly out-of-contract rates, and keep your notices, meter agents and data in order.
- Half-Hourly Bill Checking Line-by-line checks of your half-hourly electricity bills, from DUoS bands and capacity charges to CCL and VAT, with clear help raising disputes when something is wrong.
- Half-Hourly Meter Upgrades Find out whether your site needs a half-hourly, AMR or CT meter, then let us arrange the upgrade and chase communication faults until data flows again.
- Metering & Data Service Contracts Keep your half-hourly bills based on real data by appointing the right metering and data agents, including the MOP-to-MSA and HHDC-to-ADS changes under MHHS.
- MHHS Readiness Review Get your sites ready for Market-wide Half-Hourly Settlement with a practical check of MPAN data, meter communications, agent appointments and contract terms.
- Supply Capacity (kVA) Reviews Check whether your Agreed Supply Capacity fits how your site really uses power, so you are not paying for unused kVA or facing excess capacity charges.
- Load Profile & DUoS Analysis Turn your half-hourly data into plain-English reports that show your base load, out-of-hours waste and red-band peaks, and where shifting loads could reduce costs.
- Multi-Site Energy Management Bring every half-hourly MPAN in your portfolio under control, with aligned end dates, group contracts, consolidated billing and clear reporting across all your sites.
- Renewable Electricity Contracts Compare REGO-backed renewable electricity contracts for half-hourly sites, with honest advice on what green tariffs mean, on-site solar and export, and PPAs for larger users.
Areas we cover around Swansea
We help businesses across Swansea and nearby, including:
- Mumbles
- Sketty
- Morriston
- Llansamlet
- Gorseinon
- Gowerton
- Clydach
- Pontarddulais
- Neath
- Port Talbot
Nearby towns and cities
What our customers say
All reviews★★★★★As a busy manufacturing business in Manchester, managing our electricity costs is essential. Half Hourly Electricity made the whole process simple and stress-free, helping us find a competitive energy deal suited to our high electricity usage. Their team was professional, knowledgeable and helpful throughout. We’re extremely pleased with the service and would highly recommend them to other manufacturing businesses looking to manage their energy costs.
★★★★★As a data centre business based in Glasgow, having a reliable and cost-effective electricity supply is crucial to our operations. Half Hourly Electricity helped us secure a competitive energy deal tailored to our high electricity consumption and 24/7 operational needs. Their team was professional, knowledgeable and made the entire process straightforward and hassle-free. We’re extremely satisfied with the service and would highly recommend Half Hourly Electricity to other data centre businesses looking to reduce their energy costs.
★★★★★Running a busy nail salon in Hackney, London, means keeping our electricity costs under control while providing a comfortable environment for our clients. Half Hourly Electricity made finding a competitive energy deal simple and stress-free. Their team was friendly, professional and helped us find a suitable electricity plan for our salon’s needs. The whole process was smooth and hassle-free, and we’re very pleased with the service. We would highly recommend Half Hourly Electricity to other beauty salons and small businesses looking to save on their energy bills.
Half-hourly electricity in Swansea: common questions
Who is the electricity network operator in Swansea?
National Grid Electricity Distribution runs the local distribution network in Swansea (South Wales area, distributor ID 21). It sets the DUoS time bands and capacity charges on half-hourly bills, and handles requests to change your Agreed Supply Capacity.
When is the DUoS red band in Swansea?
In the South Wales area the red band runs 17:00–19:30, Monday to Friday, according to the network operator’s charging statement. Electricity used then carries the highest network charges, so moving flexible loads out of that window can lower costs.
Does my Swansea business need a half-hourly meter?
If your site’s maximum demand goes over 100 kW in any half hour, it must be half-hourly metered and settled. Smaller sites are also moving to half-hourly settlement under MHHS by May 2027. If the top line of your MPAN starts with 00, you are already half-hourly.
Can you help if our Swansea site is out of contract?
Yes. Out-of-contract and deemed rates are usually much higher than contract prices. Send us a recent bill and we can ask UK suppliers for quotes quickly, then handle the switch and your metering and data contracts.
Which areas around Swansea do you cover?
We help businesses across Swansea and nearby, including Mumbles, Sketty, Morriston and Llansamlet. We work UK-wide too, so we can look after other sites in your portfolio wherever they are.
What does a free bill check include?
We compare every line of your bill with your contract and half-hourly data: energy rates, DUoS bands, capacity and excess capacity, reactive power, TNUoS, Climate Change Levy and VAT. You get a plain-English summary of anything wrong or worth changing.
Get a half-hourly quote for your Swansea site
Tell us your postcode and contract end date, or send a recent bill. We will check your charges and compare contracts from UK suppliers. Free, and no obligation.
