Why this helps
A rough daily usage number can only go so far.
A half-hourly smart meter export shows when electricity is actually being used. That is what makes timing-based comparisons more useful.
Where to find the file
Sign in to your Octopus account and go to the electricity section.
Look for the smart meter data download area. Octopus often labels it “Get your geek on”. Choose electricity, pick a date range, and download the half-hourly consumption CSV.
What the file contains
The useful columns are the half-hour start time, end time, and consumption in kWh.
Those rows show how much electricity was used in each half-hour period. That is the information needed for a better Agile comparison.
How OffPeakly uses it
OffPeakly reads the CSV in your browser and summarises it into:
- average daily usage
- overnight usage share
- daytime usage share
- peak-period usage share
Privacy
CSV files are processed locally in the browser. The raw file is not uploaded to OffPeakly.
The useful output is the summary, not the full meter history.
Choose a sensible date range
Use enough days to represent normal life.
A week when everyone was away, a heatwave, a Christmas break, or an unusual EV charging pattern can skew the result. A longer normal period gives a better estimate.