Half-hourly (HH) data is a record of how much electricity your site uses in each 30-minute period. It shows exactly when you use power across the day, which lets us size a solar and battery system accurately and give you a realistic savings figure rather than an estimate based on annual totals alone.
Why the shape of your usage matters
Two businesses can use the same total electricity in a year but at very different times of day. Solar only helps when you are actually using power, so knowing your half-hourly shape tells us how much of the generation you would use on site — the single biggest driver of savings.
How to get your half-hourly data
If your site has a half-hourly meter, your electricity supplier or broker can provide the data, usually as a spreadsheet covering the last twelve months. Larger commercial sites are often already on half-hourly metering. If you are not, your annual consumption and current rates still let us produce a solid estimate.
This guide is general information, not financial or tax advice. Your circumstances determine what applies — please confirm with your accountant or advisor. Get a tailored proposal →
Frequently asked questions
What if I do not have half-hourly data?
No problem. We can work from your annual consumption and current tariff to produce a good estimate, then refine it if half-hourly data becomes available.
Is my data safe with you?
Yes. We use it only to prepare your proposal, in line with our privacy policy. We never sell your data.
Related guides
- Capital allowances on commercial solar: full expensing & AIA explained
- How solar improves your commercial EPC (and helps with MEES)
- How much can your business save with commercial solar?
See our funding options, commercial solar and solar by industry pages.