The Complete Guide to Half Hourly Meters

Half hourly meters allow businesses to see how much energy they use at different times of the day, helping them become more energy efficient.

They also enable a supplier to accurately price the amount of energy being used by a business; allowing suppliers to create the perfect tariff for the customer.


A half hourly meter is like a smart meter in that they send automatic readings to your energy supplier. Unlike a traditional  meter, they read how much electricity is being used every half an hour.

The ‘S’ number on a meter identifies half hourly meters; if the S number has a ‘00’ in the top left box then your meter is half hourly.

You can request access to the information your meter sends to your supplier. You may need to do this to:

  1. Calculate your unit charge and your daily rate in order to produce invoices.
  2. Your previous data is used to negotiate your next electricity contract/switch contract.
  3. Find patterns in your usage and implement energy efficiency measures where and when necessary.


These meters are for businesses with high energy usage. For businesses who use between 70-100kWh of energy in 30 minutes, they are voluntary.

There are only around 100,000 half-hourly meters in the UK.

There is some rumouring that in the future all businesses would be required to have half-hourly meters/smart meters to improve the general accuracy of billing.

Typically the types of businesses that use half-hourly meter systems are large-scale enterprises/industries such as:

  • agricultural,
  • breweries,
  • department stores,
  • supermarkets, and
  • factories


They are mandatory for all businesses who use more than 100kWh of energy in 30 minutes. These are known as mandatory half hourly meters.

BSC 272 is a piece of legislation passed in October 2014, referred to as P272. It was introduced to improve bill handling for larger businesses. It means that, as of April 2017, all non-half hourly profile class 05-08 meters had to be moved over to half-hourly meters.


Energy solutions put our energy into procuring yours. It is important customers with half-hourly meters understand how Availability and Triad, or TNUoS charges, as well as your working hours, can affect the prices you’re paying.

We can help you reduce your costs now, and secure the best possible price and your next renewal.

The process of comparing half-hourly electricity meter suppliers is slightly more complex than for smaller businesses. They compare energy deals, saving you money and time.

Here’s how the process works:

Step No. What Happens
1 Contact Energy Solutions
2 Provide your meter number and meter address
3 Provide a Letter of Authority (LOA). This allows a broker to access your data from your current provider (the process cannot move forwards until this is accessed)
4 An invitation to tender (ITT) is arranged by the broker and submitted to all energy suppliers. Within about a week, a range of rates are provided for the client to review
5 Switching date depends on contract renewal dates, if you are out of contract it can be only a day or two.


We recommend giving us a call to find out how we can save you time and money!

0131 610 1688

For more information about this post and how Energy Solutions can help with your Electricity, Gas, or Water, click on the links, or check out the contact details at the bottom of the page.