Half Hourly Insights is a free tool for UK businesses and public sector organisations that have half-hourly electricity data. It runs in your web browser, so your meter files are never uploaded. You need one Excel or CSV file per meter, ideally covering 12 months.
Using the analyser
Can I use it for my home?
No. The site and the analyser are built for business and public sector buildings, with opening hours, closures and supply capacity in mind, so the results wouldn't mean much for a household. For advice on home energy use and bills, Citizens Advice is a good place to start.
Is it really free?
Yes. There's no charge, no account and no limit on the number of sites. If you'd like help acting on the results you can contact us, but there's no obligation.
Do I need to install anything?
No. It runs in Chrome or Edge on a recent computer. It isn't designed for phones, because the charts need a larger screen.
How many sites can I load?
As many as your computer can handle. Each meter file becomes a site, and the analyser ranks them so you know which to look at first.
Is there a user guide?
Yes. Download the user guide (PDF). It takes you through getting your data, loading it, setting opening hours, reading the results, downloading reports and creating customer dashboards.
Can I save my work?
Yes. Save a project file to your computer and open it again later. It contains the readings and all your settings, so store it as carefully as the original data.
Can I share results with a client or colleague?
Yes. You can download a PDF report for one site or your whole portfolio, export to Excel, or create a customer dashboard. That's a password-protected copy of the analyser containing only their sites.
Your data
Is my data uploaded anywhere?
No. The analysis runs entirely in your web browser. Your meter files are read on your own computer and nothing is sent to us or anyone else. Once the page has loaded you can even disconnect from the internet and keep working. Our privacy notice has the details.
What data do I need?
Half-hourly electricity readings for each meter, ideally covering 12 months or more. Here is how to get them.
What if my file has gaps or errors?
The analyser finds them before showing any figures. Missing readings are left out rather than counted as zero, and days with zero readings or clock changes are flagged for you to decide on.
The results
Are the costs savings?
No. They show what a pattern costs now at the rates you entered. Any saving depends on what you change. The savings estimates are clearly labelled as estimates.
How accurate is it?
It's as accurate as the data and opening hours you give it. Each finding shows a confidence rating and the evidence behind it, and each figure is labelled as measured or estimated.
Can it tell me which equipment is wasting energy?
No. Data from the main meter shows when electricity is used, but not what is using it. The findings tell you when and where to look, and a visit to the building finds the cause.
Still have a question?
Try the analyser with the example file, or get in touch.