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Your guide to half-hour meters

As businesses come in all shapes and sizes, there are different ways to measure energy use, depending on how large your business is. 

Understanding your business energy meter can sometimes feel like an information overload, which is why we’ve created an easy-to-follow guide to help you make get to grips with what half-hourly meters are and what they could mean for your business.


  1. What is a half-hourly meter?
  2. How do they work?
  3. Are they beneficial?
  4. P272 regulation
  5. How can I compare half-hourly prices?

What is a half-hourly meter?

Half-hourly meters, also known as HH or 00 meters, automatically measure and record energy usage for businesses. It is mandatory for businesses in the UK to record their energy usage with half-hourly meters if they use at least 100,000 kWh of electricity each year. This is due to the P272 regulation, however, businesses that use over 70,00 kWh of electricity per year may request to install a half-hourly metre if they choose.

How do they work?

As the name suggests, readings are taken every half-hour, totalling 48 per day. The system relies on a fixed line that updates your supplier with automatic meter readings in half-hour periods. With updates in real time, suppliers can create incredibly accurate charges to make sure you’re paying for exactly how much energy you use.

By knowing precisely how much energy your business is using, you’ll find it easier to find a tailored tariff. That way you can ensure you’re getting the best possible deal for your business’ energy needs.

Are they beneficial?

Despite being mandatory for many businesses, there are still benefits that can be reaped from half-hourly meters. The most immediate benefit you’ll notice from a HH meter is that all energy readings are automatic, meaning you’ll never need to go through the trouble of recording or sending your readings to your supplier. 

Half-hourly meters also give you the opportunity to save money on your energy bills. However, lower bills aren’t guaranteed as they rely on your actions as a business owner. Instead, by analysing your consumption data, you can review exactly when your business uses the most energy and work towards operating more efficiently to save money on your bills.

P272 regulation

As of 2017, Ofgem approved the P272 regulation, changing how maximum demand meters work for business. It is now compulsory for all businesses to record their energy usage at half-hourly rates if they have a 05, 06, 07 or 08 meter profile.

The change was implemented as an effort to allow suppliers to better track their customer’s energy usage to help provide more accurate bills. This not only prevents customers from being overcharged with estimated billing, but it allows suppliers to buy electricity from the grid more economically.

How can I compare half-hourly prices?

Switching your tariff on a half-hourly meter can be more tricky and time-consuming than a standard meter, but it’s still the best way to ensure you’re getting the deal that’s right for you.

By choosing to switch with Love Energy Savings, our team of energy experts will be on hand every step of the way. We can secure you the fairest deal on your business energy, thanks to our years of experience helping businesses like yours.  We can also clear up any questions you have about half-hourly meters or the P272 legislation.

Get in touch with our team at 0800 9888375 or enter your postcode into our free energy comparison tool to find an amazing deal and see how much you could save.