For the full process, see our guide on how to switch electricity supplier.
What is a half-hourly (HH) meter?
A half-hourly meter records use in 30-minute intervals, common for larger business sites. Data is sent automatically; HH contracts are often priced differently from non-HH.
Why HH pricing differs
HH rates can include capacity charges, pass-through costs (balancing, BSUoS), and time-based or demand-based elements. Your usage profile directly affects the price, so HH quotes are more tailored.
Data, settlement and risk
- Data — A data collector (DC) and aggregator (DA) handle your data. When you switch, the new supplier may use different DC/DA arrangements.
- Settlement — HH supplies are settled in the wholesale market. Good data quality matters for accurate billing.
- Risk — Some HH contracts pass more risk to you; others are more fixed. Compare contract type as well as price.
What suppliers need
To quote, suppliers typically need your MPAN, meter type (HH), and often historical consumption. A broker that specialises in HH can help.
Next step: Compare electricity suppliers including half-hourly options.
Get an HH quoteGet HH quote